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Dose Escalation and Dose Expansion Study of GSK525762 in Combination With Androgen Deprivation Therapy in Participants With Castrate-resistant Prostate Cancer

A Phase IB Open-label, Dose Escalation and Expansion Study to Investigate the Safety, Pharmacokinetics, Pharmacodynamics and Clinical Activity of GSK525762 in Combination With Androgen Deprivation Therapy and Other Agents in Subjects With Castrate-resistant Prostate Cancer (CRPC)

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03150056
Enrollment
73
Registered
2017-05-11
Start date
2017-07-18
Completion date
2021-06-22
Last updated
2022-08-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid Tumours

Keywords

Abiraterone, Castrate-resistant prostate cancer, Androgen receptor targeted therapy, RP2D, Enzalutamide, GSK525762

Brief summary

This study aims to evaluate the combination of GSK525762 with other agents that have been shown to be effective in the treatment of CRPC or metastatic (m)CRPC. This study is designed to determine the maximum tolerated dose (MTD) and recommended Phase II dose (RP2D) based on safety, tolerability, pharmacokinetic, and efficacy profiles of GSK525762 in combination with either abiraterone (Arm A) or enzalutamide (Arm B).

Interventions

GSK525762 will be administered.

DRUGAbiraterone

Abiraterone will be administered.

DRUGEnzalutamide

Enzalutamide will be administered.

DRUGPrednisone

Prednisone will be administered as a concomitant medication in combination with abiraterone

Sponsors

GlaxoSmithKline
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

This will be a two-arm, open-label dose escalation and dose expansion cohort study.

Eligibility

Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Written informed consent provided. * Males \>=18 years of age (at the time written consent is obtained for screening). * Histologically confirmed adenocarcinoma of the prostate: screening and on-treatment biopsy is mandatory. If adequate number of paired biopsy samples are collected (\>=20 paired samples for each dose level in each Arm, unless an Arm is closed early), then further biopsy sampling will be considered based on available data; screening biopsy can be waived if participant had a recent biopsy after failure of the most recent therapy (within 30 days) and the biopsy sample is secured to be sent as screening biopsy for this study. * Surgically or medically castrated, with testosterone levels of less than or equal to (\<=)50 nanograms per deciliter (ng/dL) (\<2.0 nanometer \[nM\]). If the participant is being treated with luteinizing hormone-releasing hormone (LHRH) agonists/antagonists (participant who have not undergone orchiectomy) this therapy must have been initiated at least 4 weeks prior to Week 1 Day 1 and must be continued throughout the study. * Participants must have failed prior therapy with abiraterone, enzalutamide, or both: 1. Has completed at least 12 weeks of prior continuous therapy with abiraterone or enzalutamide in any prior line. 2. Lead-in dosing period for enzalutamide only will be required under the following circumstance: (i) If the participant has enzalutamide discontinuation for \>7 days prior to dosing start with GSK525762 plus enzalutamide on trial, then a enzalutamide only lead-in dosing of 28 days is required. (ii) If the participant has enzalutamide discontinuation for \<=7 days prior to dosing start with GSK525762 plus enzalutamide on trial, then an enzalutamide only lead-in dosing of 14 days is required. (iii) If the participant is on continuous dosing with enzalutamide prior to dosing start with GSK525762 plus enzalutamide on trial, then participant can start on combined dosing at end of screening period. (c) Lead-in dosing period for abiraterone only will be required: if the participant has abiraterone discontinuation for more than 3 days prior to dosing start with GSK525762 plus abiraterone on trial, then abiraterone only lead-in dosing of 7 days is required. * One to two line(s) of prior taxane-based chemotherapy allowed. If docetaxel chemotherapy is used more than once, this will be considered as one regimen. Participants who have not received prior chemotherapy in any setting will qualify for study if they are ineligible for or refuse chemotherapy. * Documented prostate cancer progression as assessed by the investigator with one of the following: 1. PSA progression defined by a minimum of 3 rising PSA levels with an interval of \>=1 week between each determination. The PSA value at screening must be \>=5 microgram (µg)/Liter (L) (5 ng/mL) if PSA is the only indication of progression; participants on systemic glucocorticoids for control of symptoms must have documented PSA progression by PCWG3 while on systemic glucocorticoids prior to commencing Week 1 Day 1 treatment. 2. Radiographic progression of soft tissue disease by PCWG3-modified RECIST 1.1 criteria or bone metastasis with 2 or more documented new bone lesions on a bone scan with or without PSA progression. * ECOG performance status of 0 or 1. * Life expectancy \>12 weeks. * Able to swallow and retain orally administered medication. * Must have adequate organ function. * Male participants are eligible to participate if they agree to use contraceptive methods.

Exclusion criteria

* Surgery or local prostatic intervention (excluding a prostatic biopsy) less than 28 days of Week 1 Day 1. * Participants with neuroendocrine and/or small cell CRPC. * Recent prior therapy, defined as: 1. Any investigational or approved non-biologic anti-cancer drug within 14 days prior to the first dose of GSK525762 and abiraterone/enzalutamide. 2. Any nitrosoureas or mitomycin C within 42 days prior to the first dose of GSK525762 and abiraterone/enzalutamide. 3. Any anti-cancer biologic agents within five half-lives prior to the first dose of GSK525762 and abiraterone/enzalutamide. 4. If the participant received radiotherapy \<90 days prior to study treatment, the irradiated lesion cannot be the only lesion used for evaluating response. 5. Any major surgery within 28 days prior to the first dose of GSK525762 and abiraterone/enzalutamide. * Evidence of severe or uncontrolled systemic diseases (e.g., unstable or uncompensated respiratory, hepatic, renal, cardiac disease, or clinically significant bleeding episodes). Any serious and/or unstable pre-existing medical (aside from malignancy), psychiatric disorder, or other conditions that could interfere with participant's safety, obtaining informed consent or compliance to the study procedures, in the opinion of the Investigator; systolic blood pressure higher than 150 millimeter of mercury (mmHg) or diastolic blood pressure higher than 90 mmHg found on 2 separate occasions separated by 1 week, despite adequate therapy, will be defined as uncontrolled hypertension; uncontrolled diabetes mellitus (despite therapeutic, compliance intervention) as defined by a hemoglobin A1c (HbA1c) level more than 8% and/or occurrence of more than 2 episodes of ketoacidosis in the 12 months prior to the first dose of study drug. * Cardiac abnormalities as evidenced by any of the following: 1. Baseline QT interval corrected for heart rate by Fridericia's formula (QTcF) interval \>=480 milliseconds (msec). 2. Clinically significant conduction abnormalities or arrhythmias, such as participants with second degree (Type II) or third degree atrio-ventricular block. 3. History or evidence of current \>=Class II congestive heart failure as defined by New York Heart Association (NYHA). 4. History of acute coronary syndromes (including unstable angina and myocardial infarction), coronary angioplasty, or stenting within the past 3 months. Participants with a history of stent placement requiring ongoing anti-coagulant therapy (e.g., clopidogrel, prasugrel) will not be permitted to enroll. 5. Known cardiac metastasis. * Participants with history of known bleeding disorder(s) or history of clinically significant hemorrhage (e.g., gastrointestinal, neurologic), within the past 6 months. * Therapeutic-dose anticoagulation (e.g., warfarin, low-molecular weight heparin \[LMWH\], or novel oral anticoagulants) must be discontinued and coagulation parameters must be normalized prior to the first dose of GSK525762 and abiraterone/enzalutimide. Prophylactic anticoagulation, with low doses (per standard practice) of agents such as LMWH, direct thrombin inhibitors, or factor Xa inhibitors is permitted. * Concurrent use of high dose aspirin (doses up to 81 milligrams (mg) oral dose daily allowed, or 100 mg, as per country standards) and non-steroidal anti-inflammatory drugs (NSAIDS), except for where NSAIDs provide documented benefit over other analgesics, and then to be used with caution including concomitant use of proton pump inhibitors). * Any acute toxicities due to prior chemotherapy and / or radiotherapy that have not resolved to a National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 4.0 grade \<=1 with the exception of chemotherapy induced alopecia and grade 2 peripheral neuropathy. * The participant has an active second malignancy other than curatively resected basal cell or squamous cell carcinoma of the skin, in situ carcinoma of the bladder, or other cancers for which they are treated with curative intent with no active disease in the 3 years prior to enrollment. * Participants with known symptomatic brain metastasis are not suitable for enrolment. Participants with asymptomatic, stable, treated brain metastases are eligible for study entry. * History of seizure within 6 months of study treatment initiation or any condition that may predispose participant to seizure (e.g., prior cortical stroke or significant brain trauma) or who are currently being treated with cytochrome P450 enzyme inducing anti-epileptic drugs for seizures (use of anti-epileptic drugs to control pain is allowed in participants not suffering from seizures unless drug is excluded due to Cytochrome (CY)P3A4 induction - phenytoin, carbamazepine, phenobarbital). * History of loss of consciousness or transient ischemic attack within 12 months prior to enrollment. * Participants with symptomatic or impending cord compression unless appropriately treated beforehand and clinically stable and asymptomatic. * Current use of a prohibited medication or planned use of any forbidden medications during treatment with GSK525762 and abiraterone/enzalutamide. This includes medications that are potent inducers or inhibitors of CYP3A4 enzymes or strong inhibitors of CYP2C8. * Participants with gastrointestinal disorders likely to interfere with absorption of the study medication. * Participants with known bleeding diathesis. * Current active liver or biliary disease (with the exception of Gilbert's syndrome or asymptomatic gallstones, liver metastases or otherwise stable chronic liver disease per investigator assessment). * Initiating bisphosphonate or denosumab therapy or adjusting dose/regimen within 3 months prior to Week 1 Day 1. Participants on a stable bisphosphonate or denosumab therapy are eligible and may continue. * Any serious known immediate or delayed hypersensitivity reaction to GSK525762 or idiosyncrasy to drugs chemically related to the investigational drugs. Additionally, any known hypersensitivity to either enzalutamide, abiraterone or any excipients would be excluded. * Known history of human immunodeficiency virus (HIV). * Presence of hepatitis B surface antigen (HBsAg) or positive hepatitis C antibody test result at screening.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)Up to 21.3 monthsPSA50 response rate is defined as percentage of participants with a decrease of \>=50% in the PSA concentration from the Baseline PSA value determined at least 12 weeks after start of treatment and confirmed \>=4 weeks later by an additional PSA evaluation.
Number of Participants With AEs Leading to Any Dose Reduction or DelaysUp to 21.3 monthsAn AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Number of participants with AEs leading to any dose reduction or delays have been presented.
Number of Participants Who Withdrew Due to Toxicity and Changes in Safety AssessmentUp to 21.3 monthsNumber of participants who withdrew due to toxicity and changes in safety assessment including laboratory parameters and vital signs have been presented.
Number of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Up to 21.3 monthsAn AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose: results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgement, or is associated with liver injury and impaired liver function.

Secondary

MeasureTime frameDescription
Trough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.
Cmax of AbirateronePre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.
Tmax of AbirateronePre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.
AUC(0-tau) of AbirateronePre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.
Ctrough of AbirateronePre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.
Cmax of EnzalutamidePre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.
Tmax of EnzalutamidePre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.
AUC(0-tau) of EnzalutamidePre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.
Objective Response RateUp to 21.3 monthsObjective response rate (ORR) is defined as the percentage of participants with a confirmed CR or PR at any time as per PCWG3-modified RECIST version 1.1; where CR: Disappearance of all target lesions. Any pathological lymph nodes must be \<10 millimeter (mm) in the short axis and PR: At least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the Baseline sum of the diameters.
Disease Control Rate at Week 24Week 24Disease control rate (DCR) is defined as the percentage of participants with \>=1 post-Baseline disease assessment who showed either a confirmed complete response (CR), partial response (PR) or stable disease (SD) observed at \>=24 weeks per prostate cancer working group 3 (PCWG3)-modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1; where CR: disappearance of all target lesions. Any pathological lymph nodes must be \<10 millimeter in the short axis; PR: At least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the Baseline sum of the diameters; SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive diseases. Confidence interval (CI) was computed using exact two sided 95% CI.
Composite Response RateUp to 21.3 monthsComposite response rate was defined as the percentage of participants with one of the following: a) Response based on PCWG3-modified RECIST version 1.1, b) PSA decrease of \>=50% from Baseline at Week 12 and thereafter, or c) Circulating Tumor-cell Count Conversion from unfavorable (\>=5/7.5 milliliter \[mL\]) at Baseline to favorable (\<5/7.5 mL) confirmed by a second assessment at least 4 weeks later. If a participant met at least one of the above requirements, then that participant was considered a composite responder. CI was computed using exact two sided 95% CI.
Circulating Tumor Cells (CTC) Response RateUp to 21.3 monthsCTC response rate is defined as the percentage of participants with a CTC conversion to \<5/7.5 mL blood at nadir (confirmed by a second consecutive value obtained four or more weeks later) for participants with unfavourable CTC (\>=5/7.5 mL) at Baseline. CI was computed using exact two sided 95% CI.
Prostate-specific Antigen (PSA) Response Rate at Week 4Week 4PSA Response Rate is defined as percentage of participants achieving \>=30% decrease from Baseline PSA after 4 weeks of study treatment. The CI was calculated using exact two sided 95% CI for the percentage of participants with Baseline PSA values who show \>=30% reduction in PSA at \>=4 weeks post-Baseline.
Time to Disease ProgressionUp to 21.3 monthsTime to disease progression is defined as the time from date of first dose of study treatment to date of disease progression defined as one or more of the following criteria: 1. Radiographic progression by PCWG3-modified RECIST version 1.1 for participants with measurable disease, 2. Bone progression on bone scan according to the PCGW3 criteria, 3. PSA progression according to the PCWG3 criteria accompanied by any one of the following: investigator-defined clinical progression or either of the above RECIST version 1.1 radiographic progression or bone progression.
Radiographic Progression-free Survival (rPFS)Up to 21.3 montthsrPFS is defined as the time from study treatment start until the first date of either disease progression or death due to any cause. The date of disease progression is defined as the earliest date of disease progression as assessed by the investigator using PCWG3-modified RECIST, version 1.1 or progression on bone scan. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as a reference, the smallest sum of diameters recorded since the treatment started.
Number of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance StatusUp to 21.3 monthsPerformance status assessments were based on 6-point ECOG scale (from 0 to 5), where 0=fully active, able to carry on all pre-disease performance without restriction; 1=restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature (e.g., light house work, office work); 2=ambulatory and capable of all self-care but unable to carry out any work activities, up and about more than 50% of waking hours; 3=capable of only limited self-care, confined to bed or chair more than 50% of waking hours; 4=completely disabled, cannot carry on any self-care, totally confined to bed or chair; and 5=dead. Data for worst case post-Baseline is presented.
Change From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Baseline (Week 1 Day 1, pre-dose) and on Day 1 of Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 61EORTC QLQ-C30 includes 30-items with single and multi-item scales. These included 5 functional scales (physical functioning, role functioning, cognitive functioning, emotional functioning and social functioning), 3 symptom scales (fatigue, pain and nausea/vomiting), a GHS/ Quality-of-Life (QoL) scale, and six single items (constipation, diarrhea, insomnia, dyspnea, appetite loss and financial difficulties). Response options for GHS/QoL range from 1 to 4, where 1=not at all and 4=very much. Scores were averaged and transformed to a 0 to 100 scale, with higher scores representing a high QoL. Baseline is defined as the latest non-missing assessment time-point prior to the first study treatment dose. Change from Baseline was calculated as post-Baseline visit value minus Baseline value.
Change From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursBaseline (Pre-dose on Week 1 Day 1) and on Day 1 of Weeks 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 61, 73, 85, 97BPI-SF is 9-item self-administered questionnaire. Pain intensity score was calculated from the four items (items 3, 4, 5 and 6) for worst pain, least pain, average pain and current pain. Worst pain in last 24 hours was rated from 0 (no pain) to 10 (pain as bad as you can imagine). Baseline is defined as the latest non-missing assessment time-point prior to the first study treatment dose (latest up to Week 1 Day 1). Change from Baseline was calculated as post-Baseline visit value minus Baseline value.
Ctrough of EnzalutamidePre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.
Maximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis. PK Population consisted of all participants from the All Treated Safety Population for whom a PK sample was obtained and analyzed.
Time to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.
Area Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.

Other

MeasureTime frameDescription
Number of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyUp to 3 years and 11 monthsAn AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose: results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgement, or is associated with liver injury and impaired liver function. Number of Participants With any AEs and SAEs collected from start of the treatment until end of the study were reported.
Number of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the StudyUp to 3 years and 11 monthsNumber of participants who withdrew due to toxicity and changes in safety assessment including laboratory parameters and vital signs from start of the treatment until end of the study were reported.
Number of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyUp to 3 years and 11 monthsAn AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Number of Participants with AEs leading to any dose reduction or delays from start of the treatment until end of the study were reported.

Countries

Australia, Spain, United Kingdom, United States

Participant flow

Recruitment details

This was an open-label, dose escalation and expansion study to investigate safety, pharmacokinetics, pharmacodynamics and clinical activity of GSK525762 in combination with abiraterone or enzalutamide in participants with castrate resistant prostate cancer (CRPC).

Pre-assignment details

This study has been terminated due to meeting protocol defined futility. A total of 73 participants were enrolled in the study.

Participants by arm

ArmCount
GSK525762 60 mg+Abiraterone 1000 mg
Participants received once daily oral dose of GSK525762 60 milligram (mg) in combination with abiraterone 1000 mg up to maximum of 21.3 months. Participants received prednisone 5 mg orally twice daily as per abiraterone label.
10
GSK525762 60 mg Alternate+Abiraterone 1000 mg
Participants received an alternate dosing schedule- once daily GSK525762 60 mg + abiraterone 1000 mg tablets via the oral route for 2 weeks followed by 1 week off-treatment up to maximum of 21.3 months. Participants received prednisone 5 mg orally twice daily as per abiraterone label.
6
GSK525762 40 mg+Abiraterone 1000 mg
Participants received once daily oral dose of GSK525762 40 mg in combination with abiraterone 1000 mg up to maximum of 21.3 months. Participants received prednisone 5 mg orally twice daily as per abiraterone label.
4
GSK525762 80 mg+Enzalutamide 160 mg
Participants received once daily oral dose of GSK525762 80 mg in combination with enzalutamide 160 mg up to maximum of 21.3 months.
10
GSK525762 60 mg+Enzalutamide 160 mg
Participants received once daily oral dose of GSK525762 60 mg in combination with enzalutamide 160 mg up to maximum of 21.3 months.
22
GSK525762 60 mg Alternate+Enzalutamide 160 mg
Participants received an alternate dosing schedule- once daily GSK525762 60 mg + enzalutamide 160 mg tablets via the oral route for 2 weeks followed by 1 week off-treatment up to maximum of 21.3 months.
21
Total73

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004FG005
Overall StudyDeath9227810
Overall StudyStudy terminated by Sponsor131156
Overall StudyWithdrawal by Subject000002

Baseline characteristics

CharacteristicGSK525762 60 mg+Abiraterone 1000 mgGSK525762 60 mg Alternate+Abiraterone 1000 mgGSK525762 40 mg+Abiraterone 1000 mgGSK525762 80 mg+Enzalutamide 160 mgGSK525762 60 mg+Enzalutamide 160 mgGSK525762 60 mg Alternate+Enzalutamide 160 mgTotal
Age, Continuous70.4 Years
STANDARD_DEVIATION 7.69
68.0 Years
STANDARD_DEVIATION 9.57
76.3 Years
STANDARD_DEVIATION 4.11
69.3 Years
STANDARD_DEVIATION 4.72
71.0 Years
STANDARD_DEVIATION 6.49
69.1 Years
STANDARD_DEVIATION 5.11
70.2 Years
STANDARD_DEVIATION 6.32
Race/Ethnicity, Customized
Asian-East Asian Heritage
2 Participants0 Participants0 Participants0 Participants0 Participants0 Participants2 Participants
Race/Ethnicity, Customized
Black or African American
1 Participants0 Participants0 Participants0 Participants1 Participants1 Participants3 Participants
Race/Ethnicity, Customized
White-Arabic/North African Heritage
0 Participants0 Participants0 Participants0 Participants0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
White-White/Caucasian/European Heritage
7 Participants6 Participants4 Participants10 Participants21 Participants19 Participants67 Participants
Sex: Female, Male
Female
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Sex: Female, Male
Male
10 Participants6 Participants4 Participants10 Participants22 Participants21 Participants73 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
9 / 102 / 62 / 47 / 108 / 2210 / 21
other
Total, other adverse events
10 / 106 / 64 / 410 / 1022 / 2221 / 21
serious
Total, serious adverse events
4 / 102 / 60 / 41 / 106 / 227 / 21

Outcome results

Primary

Number of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment

Number of participants who withdrew due to toxicity and changes in safety assessment including laboratory parameters and vital signs have been presented.

Time frame: Up to 21.3 months

Population: All Treated Population.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment6 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment2 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment3 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment8 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment4 Participants
Primary

Number of Participants With AEs Leading to Any Dose Reduction or Delays

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Number of participants with AEs leading to any dose reduction or delays have been presented.

Time frame: Up to 21.3 months

Population: All Treated Population.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction4 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay5 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction1 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction0 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay4 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction7 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay8 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction10 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay15 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose reduction7 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or DelaysDose delay12 Participants
Primary

Number of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose: results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgement, or is associated with liver injury and impaired liver function.

Time frame: Up to 21.3 months

Population: All Treated Population consisted of all participants who received at least one dose of GSK525762 or abiraterone or enzalutamide.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs10 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs4 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs6 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs4 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs0 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs10 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs1 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs22 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs6 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any AEs21 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs)Any SAEs7 Participants
Primary

Percentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)

PSA50 response rate is defined as percentage of participants with a decrease of \>=50% in the PSA concentration from the Baseline PSA value determined at least 12 weeks after start of treatment and confirmed \>=4 weeks later by an additional PSA evaluation.

Time frame: Up to 21.3 months

Population: Modified All Treated Population comprised of all participants who received at least one dose of GSK525762 plus abiraterone/enzalutamide. Only those participants with data available at the indicated time points were analyzed.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
GSK525762 40 mg+Abiraterone 1000 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgPercentage of Participants With Greater Than or Equals to (>=)50 Percent (%) Decrease in Prostate-specific Antigen From Baseline (PSA50)0 Percentage of participants
Secondary

Area Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246

Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,62697.923 Hours*nanogram per milliliterGeometric Coefficient of Variation 69.1
GSK525762 60 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,84927.834 Hours*nanogram per milliliterGeometric Coefficient of Variation 71.78
GSK525762 60 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=2,1,0,5,9,103765.196 Hours*nanogram per milliliterGeometric Coefficient of Variation 0.47
GSK525762 60 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,74170.516 Hours*nanogram per milliliterGeometric Coefficient of Variation 6.55
GSK525762 60 mg Alternate+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=2,1,0,5,9,104918.549 Hours*nanogram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,75146.749 Hours*nanogram per milliliterGeometric Coefficient of Variation 9.99
GSK525762 60 mg Alternate+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,62580.877 Hours*nanogram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,84677.411 Hours*nanogram per milliliterGeometric Coefficient of Variation 21.59
GSK525762 40 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,74598.235 Hours*nanogram per milliliterGeometric Coefficient of Variation 16.28
GSK525762 40 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,61561.908 Hours*nanogram per milliliterGeometric Coefficient of Variation 13.67
GSK525762 40 mg+Abiraterone 1000 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,84172.282 Hours*nanogram per milliliterGeometric Coefficient of Variation 31.08
GSK525762 80 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,81139.481 Hours*nanogram per milliliterGeometric Coefficient of Variation 34.32
GSK525762 80 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=2,1,0,5,9,104379.342 Hours*nanogram per milliliterGeometric Coefficient of Variation 30.76
GSK525762 80 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,6674.437 Hours*nanogram per milliliterGeometric Coefficient of Variation 57.1
GSK525762 80 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,73816.407 Hours*nanogram per milliliterGeometric Coefficient of Variation 37.02
GSK525762 60 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,73386.702 Hours*nanogram per milliliterGeometric Coefficient of Variation 30.44
GSK525762 60 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,81261.529 Hours*nanogram per milliliterGeometric Coefficient of Variation 102.14
GSK525762 60 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,6660.607 Hours*nanogram per milliliterGeometric Coefficient of Variation 14.41
GSK525762 60 mg+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=2,1,0,5,9,103373.990 Hours*nanogram per milliliterGeometric Coefficient of Variation 19.73
GSK525762 60 mg Alternate+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=2,1,0,5,9,103306.018 Hours*nanogram per milliliterGeometric Coefficient of Variation 31.84
GSK525762 60 mg Alternate+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,1,3,5,6,6386.950 Hours*nanogram per milliliterGeometric Coefficient of Variation 37.03
GSK525762 60 mg Alternate+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,2,6,9,8959.452 Hours*nanogram per milliliterGeometric Coefficient of Variation 60.97
GSK525762 60 mg Alternate+Enzalutamide 160 mgArea Under the Plasma Concentration-time Curve From Time Zero to the End of the Dosing Interval (AUC[0-tau]) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=2,2,2,4,12,73082.516 Hours*nanogram per milliliterGeometric Coefficient of Variation 33.36
Secondary

AUC(0-tau) of Abiraterone

Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 1 Day 1, n=5,1,1432.368 Hours*nanogram per milliliterGeometric Coefficient of Variation 56.74
GSK525762 60 mg+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 3 Day 1, n=1,2,11361.627 Hours*nanogram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 1 Day 1, n=5,1,1148.871 Hours*nanogram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 3 Day 1, n=1,2,1595.686 Hours*nanogram per milliliterGeometric Coefficient of Variation 64.72
GSK525762 40 mg+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 1 Day 1, n=5,1,11405.809 Hours*nanogram per milliliter
GSK525762 40 mg+Abiraterone 1000 mgAUC(0-tau) of AbirateroneWeek 3 Day 1, n=1,2,12185.039 Hours*nanogram per milliliter
Secondary

AUC(0-tau) of Enzalutamide

Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25

Population: PK Population. AUC(0-tau) could not be derived as only pre-dose samples were collected.

ArmMeasureValue (GEOMETRIC_MEAN)
GSK525762 60 mg+Abiraterone 1000 mgAUC(0-tau) of EnzalutamideNA Hours*microgram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgAUC(0-tau) of EnzalutamideNA Hours*microgram per milliliter
GSK525762 40 mg+Abiraterone 1000 mgAUC(0-tau) of EnzalutamideNA Hours*microgram per milliliter
Secondary

Change From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 Hours

BPI-SF is 9-item self-administered questionnaire. Pain intensity score was calculated from the four items (items 3, 4, 5 and 6) for worst pain, least pain, average pain and current pain. Worst pain in last 24 hours was rated from 0 (no pain) to 10 (pain as bad as you can imagine). Baseline is defined as the latest non-missing assessment time-point prior to the first study treatment dose (latest up to Week 1 Day 1). Change from Baseline was calculated as post-Baseline visit value minus Baseline value.

Time frame: Baseline (Pre-dose on Week 1 Day 1) and on Day 1 of Weeks 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 61, 73, 85, 97

Population: Modified All Treated Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,70.5 Scores on a scaleStandard Deviation 0.71
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,82.5 Scores on a scaleStandard Deviation 7.78
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,150.5 Scores on a scaleStandard Deviation 1.77
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,130.1 Scores on a scaleStandard Deviation 2.62
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,150.4 Scores on a scaleStandard Deviation 1.92
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,17-0.8 Scores on a scaleStandard Deviation 3.06
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,131.3 Scores on a scaleStandard Deviation 1.53
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,62.0 Scores on a scale
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,150.5 Scores on a scaleStandard Deviation 1.91
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,72.0 Scores on a scaleStandard Deviation 3
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,131.3 Scores on a scaleStandard Deviation 0.96
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,17-0.3 Scores on a scaleStandard Deviation 1.26
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,130.8 Scores on a scaleStandard Deviation 2.86
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,83.5 Scores on a scaleStandard Deviation 4.36
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,15-1.7 Scores on a scaleStandard Deviation 1.53
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,60.5 Scores on a scaleStandard Deviation 0.71
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 61 Day 1,n=0,0,1,1,1,1-2.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,17-1.0 Scores on a scaleStandard Deviation 0.82
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,13-2.3 Scores on a scaleStandard Deviation 1.71
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 25 Day 1,n=0,0,1,2,3,43.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,72.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 49 Day 1,n=0,0,1,3,1,32.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,8-0.5 Scores on a scaleStandard Deviation 4.95
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,6-2.5 Scores on a scaleStandard Deviation 0.71
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 45 Day 1,n=0,0,1,2,1,31.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,15-1.8 Scores on a scaleStandard Deviation 1.89
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 41 Day 1,n=0,0,1,3,1,1-1.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 37 Day 1,n=0,0,1,3,0,40.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,13-0.3 Scores on a scaleStandard Deviation 2.52
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,15-1.3 Scores on a scaleStandard Deviation 1.15
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 33 Day 1,n=0,0,1,3,2,21.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 29 Day 1,n=0,0,1,3,2,4-3.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 37 Day 1,n=0,0,1,3,0,41.7 Scores on a scaleStandard Deviation 2.08
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,130.0 Scores on a scaleStandard Deviation 1.12
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,15-1.0 Scores on a scaleStandard Deviation 2.05
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,15-0.8 Scores on a scaleStandard Deviation 1.28
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,17-0.9 Scores on a scaleStandard Deviation 2.13
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,13-0.5 Scores on a scaleStandard Deviation 2.07
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,70.2 Scores on a scaleStandard Deviation 1.92
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,8-0.8 Scores on a scaleStandard Deviation 3.11
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,6-0.2 Scores on a scaleStandard Deviation 2.49
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 25 Day 1,n=0,0,1,2,3,40.0 Scores on a scaleStandard Deviation 0
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 29 Day 1,n=0,0,1,3,2,4-0.7 Scores on a scaleStandard Deviation 1.15
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 33 Day 1,n=0,0,1,3,2,20.7 Scores on a scaleStandard Deviation 1.15
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 41 Day 1,n=0,0,1,3,1,11.3 Scores on a scaleStandard Deviation 1.53
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 45 Day 1,n=0,0,1,2,1,32.5 Scores on a scaleStandard Deviation 2.12
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 49 Day 1,n=0,0,1,3,1,30.3 Scores on a scaleStandard Deviation 1.53
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 61 Day 1,n=0,0,1,1,1,10.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 73 Day 1,n=0,0,0,1,1,00.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 85 Day 1,n=0,0,0,1,1,03.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 73 Day 1,n=0,0,0,1,1,0-2.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 33 Day 1,n=0,0,1,3,2,2-1.5 Scores on a scaleStandard Deviation 2.12
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 45 Day 1,n=0,0,1,2,1,3-1.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 97 Day 1,n=0,0,0,0,1,0-3.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,130.0 Scores on a scaleStandard Deviation 2.91
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 29 Day 1,n=0,0,1,3,2,4-3.5 Scores on a scaleStandard Deviation 0.71
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,7-1.7 Scores on a scaleStandard Deviation 2.21
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 85 Day 1,n=0,0,0,1,1,0-3.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,8-1.3 Scores on a scaleStandard Deviation 1.15
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 25 Day 1,n=0,0,1,2,3,4-1.3 Scores on a scaleStandard Deviation 5.69
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,150.3 Scores on a scaleStandard Deviation 3.26
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,130.2 Scores on a scaleStandard Deviation 2.49
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 61 Day 1,n=0,0,1,1,1,1-3.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 49 Day 1,n=0,0,1,3,1,3-3.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,6-2.3 Scores on a scaleStandard Deviation 4.04
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,170.7 Scores on a scaleStandard Deviation 3.38
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 41 Day 1,n=0,0,1,3,1,1-3.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,150.2 Scores on a scaleStandard Deviation 2.81
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 21 Day 1,n=1,2,2,5,3,61.0 Scores on a scaleStandard Deviation 1.79
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 49 Day 1,n=0,0,1,3,1,32.7 Scores on a scaleStandard Deviation 2.52
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 25 Day 1,n=0,0,1,2,3,4-1.0 Scores on a scaleStandard Deviation 1.15
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 4 Day 1,n=8,4,3,8,16,150.4 Scores on a scaleStandard Deviation 1.76
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 29 Day 1,n=0,0,1,3,2,40.8 Scores on a scaleStandard Deviation 4.19
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 33 Day 1,n=0,0,1,3,2,2-1.0 Scores on a scaleStandard Deviation 1.41
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 3 Day 1,n=8,3,4,10,16,150.0 Scores on a scaleStandard Deviation 1.51
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 37 Day 1,n=0,0,1,3,0,40.0 Scores on a scaleStandard Deviation 1.41
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 41 Day 1,n=0,0,1,3,1,1-1.0 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 2 Day 1,n=9,5,4,9,14,130.2 Scores on a scaleStandard Deviation 1.48
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 61 Day 1,n=0,0,1,1,1,13.0 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 45 Day 1,n=0,0,1,2,1,31.7 Scores on a scaleStandard Deviation 1.15
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 13 Day 1,n=2,3,1,5,7,7-0.4 Scores on a scaleStandard Deviation 2.15
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 17 Day 1,n=2,4,2,5,3,8-0.5 Scores on a scaleStandard Deviation 2.2
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 9 Day 1,n=3,4,3,8,10,13-0.4 Scores on a scaleStandard Deviation 2.4
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in Brief Pain Inventory - Short Form (BPI-SF): Pain Intensity- Pain at Worst in Last 24 HoursWeek 5 Day 1,n=6,4,4,10,19,17-0.2 Scores on a scaleStandard Deviation 1.78
Secondary

Change From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)

EORTC QLQ-C30 includes 30-items with single and multi-item scales. These included 5 functional scales (physical functioning, role functioning, cognitive functioning, emotional functioning and social functioning), 3 symptom scales (fatigue, pain and nausea/vomiting), a GHS/ Quality-of-Life (QoL) scale, and six single items (constipation, diarrhea, insomnia, dyspnea, appetite loss and financial difficulties). Response options for GHS/QoL range from 1 to 4, where 1=not at all and 4=very much. Scores were averaged and transformed to a 0 to 100 scale, with higher scores representing a high QoL. Baseline is defined as the latest non-missing assessment time-point prior to the first study treatment dose. Change from Baseline was calculated as post-Baseline visit value minus Baseline value.

Time frame: Baseline (Week 1 Day 1, pre-dose) and on Day 1 of Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 61

Population: Modified All Treated Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 3 Day 1,n=6,0,1,4,3,7-8.3 Scores on a scaleStandard Deviation 23.57
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,10-8.3 Scores on a scaleStandard Deviation 10.54
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,8-8.3 Scores on a scaleStandard Deviation 12.91
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,3-25.0 Scores on a scale
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,3-25.0 Scores on a scale
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 9 Day 1,n=2,0,1,2,3,6-12.5 Scores on a scaleStandard Deviation 17.68
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 5 Day 1,n=3,0,1,3,5,9-8.3 Scores on a scaleStandard Deviation 14.43
GSK525762 60 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 1 Day 1,n=1,0,0,0,2,08.3 Scores on a scale
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,1016.7 Scores on a scale
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,816.7 Scores on a scale
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,38.3 Scores on a scale
GSK525762 60 mg Alternate+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,3-16.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 37 Day 1,n=0,0,1,0,0,30.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 33 Day 1,n=0,0,1,0,1,28.3 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,316.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 45 Day 1,n=0,0,1,0,0,1-8.3 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 9 Day 1,n=2,0,1,2,3,6-8.3 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 41 Day 1,n=0,0,1,0,0,08.3 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,8-12.5 Scores on a scaleStandard Deviation 29.46
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 61 Day 1,n=0,0,1,0,0,116.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,30.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 3 Day 1,n=6,0,1,4,3,7-16.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 49 Day 1,n=0,0,1,0,0,216.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 25 Day 1,n=0,0,1,0,0,10.0 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 21 Day 1,n=0,0,1,1,0,216.7 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 5 Day 1,n=3,0,1,3,5,98.3 Scores on a scale
GSK525762 40 mg+Abiraterone 1000 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,100.0 Scores on a scaleStandard Deviation 11.79
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,30.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 3 Day 1,n=6,0,1,4,3,7-4.2 Scores on a scaleStandard Deviation 8.33
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,105.6 Scores on a scaleStandard Deviation 9.62
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,8-2.1 Scores on a scaleStandard Deviation 4.17
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 21 Day 1,n=0,0,1,1,0,20.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,30.0 Scores on a scale
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 5 Day 1,n=3,0,1,3,5,9-5.6 Scores on a scaleStandard Deviation 9.62
GSK525762 80 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 9 Day 1,n=2,0,1,2,3,6-20.8 Scores on a scaleStandard Deviation 5.89
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 3 Day 1,n=6,0,1,4,3,72.8 Scores on a scaleStandard Deviation 4.81
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,101.4 Scores on a scaleStandard Deviation 9.74
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,80.0 Scores on a scaleStandard Deviation 13.61
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 5 Day 1,n=3,0,1,3,5,90.0 Scores on a scaleStandard Deviation 11.79
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 9 Day 1,n=2,0,1,2,3,6-30.6 Scores on a scaleStandard Deviation 12.73
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,3-8.3 Scores on a scaleStandard Deviation 11.79
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 1 Day 1,n=1,0,0,0,2,04.2 Scores on a scaleStandard Deviation 5.89
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,30.0 Scores on a scale
GSK525762 60 mg+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 33 Day 1,n=0,0,1,0,1,20.0 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 17 Day 1,n=1,1,1,1,1,3-11.1 Scores on a scaleStandard Deviation 19.25
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 25 Day 1,n=0,0,1,0,0,1-8.3 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 29 Day 1,n=0,0,0,0,0,2-8.3 Scores on a scaleStandard Deviation 11.79
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 61 Day 1,n=0,0,1,0,0,1-16.7 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 3 Day 1,n=6,0,1,4,3,7-1.2 Scores on a scaleStandard Deviation 3.15
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 33 Day 1,n=0,0,1,0,1,2-8.3 Scores on a scaleStandard Deviation 11.79
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 13 Day 1,n=1,1,1,1,2,30.0 Scores on a scaleStandard Deviation 0
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 37 Day 1,n=0,0,1,0,0,3-2.8 Scores on a scaleStandard Deviation 4.81
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 9 Day 1,n=2,0,1,2,3,6-12.5 Scores on a scaleStandard Deviation 10.21
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 5 Day 1,n=3,0,1,3,5,9-0.0 Scores on a scaleStandard Deviation 11.02
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 45 Day 1,n=0,0,1,0,0,10.0 Scores on a scale
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 4 Day 1,n=6,1,2,3,6,102.5 Scores on a scaleStandard Deviation 16.22
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 49 Day 1,n=0,0,1,0,0,2-8.3 Scores on a scaleStandard Deviation 0
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 2 Day 1,n=6,1,2,4,4,8-1.0 Scores on a scaleStandard Deviation 12.94
GSK525762 60 mg Alternate+Enzalutamide 160 mgChange From Baseline in European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core-30 (EORTC QLQ-C30): Global Health Status (GHS)Week 21 Day 1,n=0,0,1,1,0,2-4.2 Scores on a scaleStandard Deviation 5.89
Secondary

Circulating Tumor Cells (CTC) Response Rate

CTC response rate is defined as the percentage of participants with a CTC conversion to \<5/7.5 mL blood at nadir (confirmed by a second consecutive value obtained four or more weeks later) for participants with unfavourable CTC (\>=5/7.5 mL) at Baseline. CI was computed using exact two sided 95% CI.

Time frame: Up to 21.3 months

Population: Modified All Treated Population. Only those participants with data available at the indicated time points were analyzed. For GSK525762 40 mg+Abiraterone 1000 mg arm, there were no unfavorable values at Baseline, hence CTC response rate (change from unfavorable to favorable) could not be derived for this arm.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgCirculating Tumor Cells (CTC) Response Rate0 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgCirculating Tumor Cells (CTC) Response Rate0 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgCirculating Tumor Cells (CTC) Response Rate33 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgCirculating Tumor Cells (CTC) Response Rate8 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgCirculating Tumor Cells (CTC) Response Rate0 Percentage of participants
Secondary

Cmax of Abiraterone

Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgCmax of AbirateroneWeek 1 Day 1, n=10,5,477.962 Nanogram per milliliterGeometric Coefficient of Variation 57.07
GSK525762 60 mg+Abiraterone 1000 mgCmax of AbirateroneWeek 3 Day 1, n=4,4,2149.673 Nanogram per milliliterGeometric Coefficient of Variation 65.39
GSK525762 60 mg Alternate+Abiraterone 1000 mgCmax of AbirateroneWeek 1 Day 1, n=10,5,463.369 Nanogram per milliliterGeometric Coefficient of Variation 114.31
GSK525762 60 mg Alternate+Abiraterone 1000 mgCmax of AbirateroneWeek 3 Day 1, n=4,4,287.554 Nanogram per milliliterGeometric Coefficient of Variation 110.92
GSK525762 40 mg+Abiraterone 1000 mgCmax of AbirateroneWeek 1 Day 1, n=10,5,4122.496 Nanogram per milliliterGeometric Coefficient of Variation 131.3
GSK525762 40 mg+Abiraterone 1000 mgCmax of AbirateroneWeek 3 Day 1, n=4,4,2146.924 Nanogram per milliliterGeometric Coefficient of Variation 76.98
Secondary

Cmax of Enzalutamide

Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25

Population: PK Population. Cmax could not be derived as only pre-dose samples were collected.

ArmMeasureValue (GEOMETRIC_MEAN)
GSK525762 60 mg+Abiraterone 1000 mgCmax of EnzalutamideNA Microgram per milliliter
GSK525762 60 mg Alternate+Abiraterone 1000 mgCmax of EnzalutamideNA Microgram per milliliter
GSK525762 40 mg+Abiraterone 1000 mgCmax of EnzalutamideNA Microgram per milliliter
Secondary

Composite Response Rate

Composite response rate was defined as the percentage of participants with one of the following: a) Response based on PCWG3-modified RECIST version 1.1, b) PSA decrease of \>=50% from Baseline at Week 12 and thereafter, or c) Circulating Tumor-cell Count Conversion from unfavorable (\>=5/7.5 milliliter \[mL\]) at Baseline to favorable (\<5/7.5 mL) confirmed by a second assessment at least 4 weeks later. If a participant met at least one of the above requirements, then that participant was considered a composite responder. CI was computed using exact two sided 95% CI.

Time frame: Up to 21.3 months

Population: Modified All Treated Population.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgComposite Response Rate0 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgComposite Response Rate0 Percentage of participants
GSK525762 40 mg+Abiraterone 1000 mgComposite Response Rate0 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgComposite Response Rate10 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgComposite Response Rate5 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgComposite Response Rate0 Percentage of participants
Secondary

Ctrough of Abiraterone

Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgCtrough of AbirateroneWeek 1 Day 1, n=9,2,37.603 Nanogram per milliliterGeometric Coefficient of Variation 93
GSK525762 60 mg+Abiraterone 1000 mgCtrough of AbirateroneWeek 3 Day 1, n=2,4,115.114 Nanogram per milliliterGeometric Coefficient of Variation 9.84
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of AbirateroneWeek 1 Day 1, n=9,2,34.636 Nanogram per milliliterGeometric Coefficient of Variation 1802.64
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of AbirateroneWeek 3 Day 1, n=2,4,17.697 Nanogram per milliliterGeometric Coefficient of Variation 69.99
GSK525762 40 mg+Abiraterone 1000 mgCtrough of AbirateroneWeek 1 Day 1, n=9,2,311.263 Nanogram per milliliterGeometric Coefficient of Variation 86.21
GSK525762 40 mg+Abiraterone 1000 mgCtrough of AbirateroneWeek 3 Day 1, n=2,4,121.800 Nanogram per milliliter
Secondary

Ctrough of Enzalutamide

Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 25 Day 1, Pre-dose, n=2,2,210.103 Microgram per milliliterGeometric Coefficient of Variation 8.13
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 5 Day 1, Pre-dose, n=10,15,1810.026 Microgram per milliliterGeometric Coefficient of Variation 21.8
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 17 Day 1, Pre-dose, n=4,2,48.621 Microgram per milliliterGeometric Coefficient of Variation 22.86
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 1 Day 1, Pre-dose, n=9,20,1813.066 Microgram per milliliterGeometric Coefficient of Variation 21.74
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 9 Day 1, Pre-dose, n=6,6,1310.021 Microgram per milliliterGeometric Coefficient of Variation 27.01
GSK525762 60 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 3 Day 1, Pre-dose, n=9,19,1310.385 Microgram per milliliterGeometric Coefficient of Variation 23.3
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 9 Day 1, Pre-dose, n=6,6,138.064 Microgram per milliliterGeometric Coefficient of Variation 85.9
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 17 Day 1, Pre-dose, n=4,2,412.568 Microgram per milliliterGeometric Coefficient of Variation 10.14
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 3 Day 1, Pre-dose, n=9,19,1310.902 Microgram per milliliterGeometric Coefficient of Variation 24.96
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 25 Day 1, Pre-dose, n=2,2,213.069 Microgram per milliliterGeometric Coefficient of Variation 9.75
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 1 Day 1, Pre-dose, n=9,20,1813.313 Microgram per milliliterGeometric Coefficient of Variation 21.7
GSK525762 60 mg Alternate+Abiraterone 1000 mgCtrough of EnzalutamideWeek 5 Day 1, Pre-dose, n=10,15,189.814 Microgram per milliliterGeometric Coefficient of Variation 44.21
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 5 Day 1, Pre-dose, n=10,15,1812.561 Microgram per milliliterGeometric Coefficient of Variation 31.27
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 1 Day 1, Pre-dose, n=9,20,1814.546 Microgram per milliliterGeometric Coefficient of Variation 30.34
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 3 Day 1, Pre-dose, n=9,19,1311.497 Microgram per milliliterGeometric Coefficient of Variation 27.34
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 25 Day 1, Pre-dose, n=2,2,213.791 Microgram per milliliterGeometric Coefficient of Variation 5.13
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 9 Day 1, Pre-dose, n=6,6,1312.056 Microgram per milliliterGeometric Coefficient of Variation 30.12
GSK525762 40 mg+Abiraterone 1000 mgCtrough of EnzalutamideWeek 17 Day 1, Pre-dose, n=4,2,410.267 Microgram per milliliterGeometric Coefficient of Variation 58.45
Secondary

Disease Control Rate at Week 24

Disease control rate (DCR) is defined as the percentage of participants with \>=1 post-Baseline disease assessment who showed either a confirmed complete response (CR), partial response (PR) or stable disease (SD) observed at \>=24 weeks per prostate cancer working group 3 (PCWG3)-modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1; where CR: disappearance of all target lesions. Any pathological lymph nodes must be \<10 millimeter in the short axis; PR: At least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the Baseline sum of the diameters; SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive diseases. Confidence interval (CI) was computed using exact two sided 95% CI.

Time frame: Week 24

Population: Modified All Treated Population. Only those participants with data available at the indicated time points were analyzed.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgDisease Control Rate at Week 240 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgDisease Control Rate at Week 2440 Percentage of participants
GSK525762 40 mg+Abiraterone 1000 mgDisease Control Rate at Week 2450 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgDisease Control Rate at Week 2440 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgDisease Control Rate at Week 2411 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgDisease Control Rate at Week 2429 Percentage of participants
Secondary

Maximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246

Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis. PK Population consisted of all participants from the All Treated Safety Population for whom a PK sample was obtained and analyzed.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18950.319 Nanogram per milliliterGeometric Coefficient of Variation 19.18
GSK525762 60 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10891.302 Nanogram per milliliterGeometric Coefficient of Variation 36.79
GSK525762 60 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18280.892 Nanogram per milliliterGeometric Coefficient of Variation 43.14
GSK525762 60 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10447.929 Nanogram per milliliterGeometric Coefficient of Variation 39.3
GSK525762 60 mg Alternate+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18318.772 Nanogram per milliliterGeometric Coefficient of Variation 31.13
GSK525762 60 mg Alternate+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10735.171 Nanogram per milliliterGeometric Coefficient of Variation 21.63
GSK525762 60 mg Alternate+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18993.154 Nanogram per milliliterGeometric Coefficient of Variation 33.77
GSK525762 60 mg Alternate+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10444.232 Nanogram per milliliterGeometric Coefficient of Variation 26.74
GSK525762 40 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10364.151 Nanogram per milliliterGeometric Coefficient of Variation 15.46
GSK525762 40 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18199.456 Nanogram per milliliterGeometric Coefficient of Variation 32.94
GSK525762 40 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10559.711 Nanogram per milliliterGeometric Coefficient of Variation 40.59
GSK525762 40 mg+Abiraterone 1000 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18671.129 Nanogram per milliliterGeometric Coefficient of Variation 30.44
GSK525762 80 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18427.580 Nanogram per milliliterGeometric Coefficient of Variation 31.76
GSK525762 80 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10449.614 Nanogram per milliliterGeometric Coefficient of Variation 49.54
GSK525762 80 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10284.298 Nanogram per milliliterGeometric Coefficient of Variation 45.12
GSK525762 80 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18408.208 Nanogram per milliliterGeometric Coefficient of Variation 39.86
GSK525762 60 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18321.750 Nanogram per milliliterGeometric Coefficient of Variation 24.24
GSK525762 60 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10328.398 Nanogram per milliliterGeometric Coefficient of Variation 39.74
GSK525762 60 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10158.409 Nanogram per milliliterGeometric Coefficient of Variation 153.45
GSK525762 60 mg+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18333.256 Nanogram per milliliterGeometric Coefficient of Variation 48.86
GSK525762 60 mg Alternate+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,10171.527 Nanogram per milliliterGeometric Coefficient of Variation 47.88
GSK525762 60 mg Alternate+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,18323.685 Nanogram per milliliterGeometric Coefficient of Variation 25.77
GSK525762 60 mg Alternate+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,10356.615 Nanogram per milliliterGeometric Coefficient of Variation 18.26
GSK525762 60 mg Alternate+Enzalutamide 160 mgMaximum Observed Plasma Concentration (Cmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,18336.296 Nanogram per milliliterGeometric Coefficient of Variation 43.28
Secondary

Number of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status

Performance status assessments were based on 6-point ECOG scale (from 0 to 5), where 0=fully active, able to carry on all pre-disease performance without restriction; 1=restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature (e.g., light house work, office work); 2=ambulatory and capable of all self-care but unable to carry out any work activities, up and about more than 50% of waking hours; 3=capable of only limited self-care, confined to bed or chair more than 50% of waking hours; 4=completely disabled, cannot carry on any self-care, totally confined to bed or chair; and 5=dead. Data for worst case post-Baseline is presented.

Time frame: Up to 21.3 months

Population: All Treated Population. Only those participants with data available at the indicated time points were analyzed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status02 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status17 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status21 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status30 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status14 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status30 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status00 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status22 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status31 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status20 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status00 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status13 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status30 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status15 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status23 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status02 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status01 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status116 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status23 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status31 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status31 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status26 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status40 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status50 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status113 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Worst-Case Post Baseline Eastern Cooperative Oncology Group (ECOG) Performance Status01 Participants
Secondary

Objective Response Rate

Objective response rate (ORR) is defined as the percentage of participants with a confirmed CR or PR at any time as per PCWG3-modified RECIST version 1.1; where CR: Disappearance of all target lesions. Any pathological lymph nodes must be \<10 millimeter (mm) in the short axis and PR: At least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the Baseline sum of the diameters.

Time frame: Up to 21.3 months

Population: Modified All Treated Population. Only those participants with data available at the indicated time points were analyzed.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgObjective Response Rate0 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgObjective Response Rate0 Percentage of participants
GSK525762 40 mg+Abiraterone 1000 mgObjective Response Rate0 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgObjective Response Rate0 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgObjective Response Rate0 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgObjective Response Rate0 Percentage of participants
Secondary

Prostate-specific Antigen (PSA) Response Rate at Week 4

PSA Response Rate is defined as percentage of participants achieving \>=30% decrease from Baseline PSA after 4 weeks of study treatment. The CI was calculated using exact two sided 95% CI for the percentage of participants with Baseline PSA values who show \>=30% reduction in PSA at \>=4 weeks post-Baseline.

Time frame: Week 4

Population: Modified All Treated Population.

ArmMeasureValue (NUMBER)
GSK525762 60 mg+Abiraterone 1000 mgProstate-specific Antigen (PSA) Response Rate at Week 40 Percentage of participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgProstate-specific Antigen (PSA) Response Rate at Week 417 Percentage of participants
GSK525762 40 mg+Abiraterone 1000 mgProstate-specific Antigen (PSA) Response Rate at Week 40 Percentage of participants
GSK525762 80 mg+Enzalutamide 160 mgProstate-specific Antigen (PSA) Response Rate at Week 40 Percentage of participants
GSK525762 60 mg+Enzalutamide 160 mgProstate-specific Antigen (PSA) Response Rate at Week 40 Percentage of participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgProstate-specific Antigen (PSA) Response Rate at Week 40 Percentage of participants
Secondary

Radiographic Progression-free Survival (rPFS)

rPFS is defined as the time from study treatment start until the first date of either disease progression or death due to any cause. The date of disease progression is defined as the earliest date of disease progression as assessed by the investigator using PCWG3-modified RECIST, version 1.1 or progression on bone scan. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as a reference, the smallest sum of diameters recorded since the treatment started.

Time frame: Up to 21.3 montths

Population: Modified All Treated Population.

ArmMeasureValue (MEDIAN)
GSK525762 60 mg+Abiraterone 1000 mgRadiographic Progression-free Survival (rPFS)53.0 Days
GSK525762 60 mg Alternate+Abiraterone 1000 mgRadiographic Progression-free Survival (rPFS)NA Days
GSK525762 40 mg+Abiraterone 1000 mgRadiographic Progression-free Survival (rPFS)NA Days
GSK525762 80 mg+Enzalutamide 160 mgRadiographic Progression-free Survival (rPFS)416.0 Days
GSK525762 60 mg+Enzalutamide 160 mgRadiographic Progression-free Survival (rPFS)141.0 Days
GSK525762 60 mg Alternate+Enzalutamide 160 mgRadiographic Progression-free Survival (rPFS)330.0 Days
Secondary

Time to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246

Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (MEDIAN)
GSK525762 60 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,183.000 Hours
GSK525762 60 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,101.000 Hours
GSK525762 60 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,180.800 Hours
GSK525762 60 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,100.500 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,180.558 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,103.000 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,101.000 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,183.000 Hours
GSK525762 40 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,103.000 Hours
GSK525762 40 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,181.000 Hours
GSK525762 40 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,100.950 Hours
GSK525762 40 mg+Abiraterone 1000 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,182.042 Hours
GSK525762 80 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,101.042 Hours
GSK525762 80 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,180.508 Hours
GSK525762 80 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,182.067 Hours
GSK525762 80 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,100.583 Hours
GSK525762 60 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,100.933 Hours
GSK525762 60 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,181.000 Hours
GSK525762 60 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,182.917 Hours
GSK525762 60 mg+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,101.017 Hours
GSK525762 60 mg Alternate+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=4,3,3,10,17,101.875 Hours
GSK525762 60 mg Alternate+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=10,6,4,10,21,180.742 Hours
GSK525762 60 mg Alternate+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=10,6,4,10,21,181.817 Hours
GSK525762 60 mg Alternate+Enzalutamide 160 mgTime to Cmax (Tmax) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=4,3,3,9,17,100.517 Hours
Secondary

Time to Disease Progression

Time to disease progression is defined as the time from date of first dose of study treatment to date of disease progression defined as one or more of the following criteria: 1. Radiographic progression by PCWG3-modified RECIST version 1.1 for participants with measurable disease, 2. Bone progression on bone scan according to the PCGW3 criteria, 3. PSA progression according to the PCWG3 criteria accompanied by any one of the following: investigator-defined clinical progression or either of the above RECIST version 1.1 radiographic progression or bone progression.

Time frame: Up to 21.3 months

Population: Modified All Treated Population.

ArmMeasureValue (MEDIAN)
GSK525762 60 mg+Abiraterone 1000 mgTime to Disease Progression88.0 Days
GSK525762 60 mg Alternate+Abiraterone 1000 mgTime to Disease ProgressionNA Days
GSK525762 40 mg+Abiraterone 1000 mgTime to Disease ProgressionNA Days
GSK525762 80 mg+Enzalutamide 160 mgTime to Disease Progression87.0 Days
GSK525762 60 mg+Enzalutamide 160 mgTime to Disease Progression86.0 Days
GSK525762 60 mg Alternate+Enzalutamide 160 mgTime to Disease Progression84.0 Days
Secondary

Tmax of Abiraterone

Blood samples were collected at indicated time points for PK analysis of abiraterone. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (MEDIAN)
GSK525762 60 mg+Abiraterone 1000 mgTmax of AbirateroneWeek 1 Day 1, n=10,5,41.133 Hours
GSK525762 60 mg+Abiraterone 1000 mgTmax of AbirateroneWeek 3 Day 1, n=4,4,21.000 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTmax of AbirateroneWeek 1 Day 1, n=10,5,41.083 Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTmax of AbirateroneWeek 3 Day 1, n=4,4,22.000 Hours
GSK525762 40 mg+Abiraterone 1000 mgTmax of AbirateroneWeek 1 Day 1, n=10,5,40.750 Hours
GSK525762 40 mg+Abiraterone 1000 mgTmax of AbirateroneWeek 3 Day 1, n=4,4,23.017 Hours
Secondary

Tmax of Enzalutamide

Blood samples were collected at indicated time points for PK analysis of enzalutamide. PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose on Day 1 of Weeks 1, 3, 5, 9, 17 and 25

Population: PK Population. Tmax could not be derived as only pre-dose samples were collected.

ArmMeasureValue (MEDIAN)
GSK525762 60 mg+Abiraterone 1000 mgTmax of EnzalutamideNA Hours
GSK525762 60 mg Alternate+Abiraterone 1000 mgTmax of EnzalutamideNA Hours
GSK525762 40 mg+Abiraterone 1000 mgTmax of EnzalutamideNA Hours
Secondary

Trough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246

Blood samples were collected at indicated time points for PK analysis of GSK525762 and GSK3529246 (metabolite of GSK525762). PK parameters were calculated using standard non-compartmental analysis.

Time frame: Pre-dose, 30 minutes, 1, 3, 6 to 12, 24 hours post-dose on Day 1 of Weeks 1 and 3

Population: PK Population. Only those participants with data available at the indicated time points were analyzed (indicated by n=X in category titles).

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
GSK525762 60 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1758.995 Nanogram per milliliterGeometric Coefficient of Variation 52.5
GSK525762 60 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=2,2,2,1,0,08.966 Nanogram per milliliterGeometric Coefficient of Variation 93.46
GSK525762 60 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,848.223 Nanogram per milliliterGeometric Coefficient of Variation 99.09
GSK525762 60 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,422.418 Nanogram per milliliterGeometric Coefficient of Variation 192.37
GSK525762 60 mg Alternate+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1768.379 Nanogram per milliliterGeometric Coefficient of Variation 47.51
GSK525762 60 mg Alternate+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,48.696 Nanogram per milliliterGeometric Coefficient of Variation 72.93
GSK525762 60 mg Alternate+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=2,2,2,1,0,04.555 Nanogram per milliliterGeometric Coefficient of Variation 522.9
GSK525762 60 mg Alternate+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,848.291 Nanogram per milliliterGeometric Coefficient of Variation 29.86
GSK525762 40 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=2,2,2,1,0,01.410 Nanogram per milliliterGeometric Coefficient of Variation 48.34
GSK525762 40 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,863.526 Nanogram per milliliterGeometric Coefficient of Variation 3.9
GSK525762 40 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1742.107 Nanogram per milliliterGeometric Coefficient of Variation 52.26
GSK525762 40 mg+Abiraterone 1000 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,413.664 Nanogram per milliliterGeometric Coefficient of Variation 119.83
GSK525762 80 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week3 Day1,n=2,2,2,1,0,03.540 Nanogram per milliliter
GSK525762 80 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,850.882 Nanogram per milliliterGeometric Coefficient of Variation 77.1
GSK525762 80 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1746.011 Nanogram per milliliterGeometric Coefficient of Variation 38.73
GSK525762 80 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,42.100 Nanogram per milliliter
GSK525762 60 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,832.299 Nanogram per milliliterGeometric Coefficient of Variation 60.18
GSK525762 60 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,45.053 Nanogram per milliliterGeometric Coefficient of Variation 3035.92
GSK525762 60 mg+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1737.765 Nanogram per milliliterGeometric Coefficient of Variation 56.41
GSK525762 60 mg Alternate+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week3 Day1,n=3,3,2,7,13,826.165 Nanogram per milliliterGeometric Coefficient of Variation 76.95
GSK525762 60 mg Alternate+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK525762:Week1 Day1,n=8,2,3,1,3,41.660 Nanogram per milliliterGeometric Coefficient of Variation 34.6
GSK525762 60 mg Alternate+Enzalutamide 160 mgTrough Concentration (Ctrough) of GSK525762 and Its Active Metabolites GSK3529246GSK3529246:Week1 Day1,n=8,3,3,9,20,1738.200 Nanogram per milliliterGeometric Coefficient of Variation 53.15
Other Pre-specified

Number of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study

Number of participants who withdrew due to toxicity and changes in safety assessment including laboratory parameters and vital signs from start of the treatment until end of the study were reported.

Time frame: Up to 3 years and 11 months

Population: All Treated Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study6 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study2 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study3 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study8 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants Who Withdrew Due to Toxicity and Changes in Safety Assessment Until End of the Study4 Participants
Other Pre-specified

Number of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the Study

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Number of Participants with AEs leading to any dose reduction or delays from start of the treatment until end of the study were reported.

Time frame: Up to 3 years and 11 months

Population: All Treated Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction4 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay5 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction1 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction0 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay4 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction7 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay8 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction10 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay15 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose reduction7 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With AEs Leading to Any Dose Reduction or Delays Until End of the StudyDose delay12 Participants
Other Pre-specified

Number of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the Study

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose: results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgement, or is associated with liver injury and impaired liver function. Number of Participants With any AEs and SAEs collected from start of the treatment until end of the study were reported.

Time frame: Up to 3 years and 11 months

Population: All Treated Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs10 Participants
GSK525762 60 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs4 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs6 Participants
GSK525762 60 mg Alternate+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs2 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs4 Participants
GSK525762 40 mg+Abiraterone 1000 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs0 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs10 Participants
GSK525762 80 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs1 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs22 Participants
GSK525762 60 mg+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs6 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny AEs21 Participants
GSK525762 60 mg Alternate+Enzalutamide 160 mgNumber of Participants With Any Adverse Events (AEs) and Serious Adverse Events (SAEs) Until End of the StudyAny SAEs7 Participants

Source: ClinicalTrials.gov · Data processed: Feb 24, 2026