Castration Levels of Testosterone, Hormone-Resistant Prostate Cancer, Metastatic Prostate Carcinoma in the Soft Tissue, Prostate Carcinoma Metastatic in the Bone, PSA Progression, Stage IV Prostate Adenocarcinoma AJCC v7
Conditions
Brief summary
This phase II trial studies selinexor in treating patients with prostate cancer that has spread to other parts of the body (metastatic), keeps growing even when the amount of testosterone in the body is reduced to very low levels (castration-resistant), and did not respond to treatment (refractory) with abiraterone acetate and/or enzalutamide. Selinexor may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.
Detailed description
PRIMARY OBJECTIVES: I. To describe radiographic progression free survival (rPFS) associated with selinexor in patients with abiraterone (abiraterone acetate) refractory metastatic castration-resistant prostate cancer (mCRPC). SECONDARY OBJECTIVES: I. To measure prostate-specific antigen (PSA) changes at 12 weeks post-selinexor initiation. II. To assess time to PSA progression. III. To measure time to development of \>= 2 new bone lesions. IV. To compare the relationship of abiraterone-resistance status (primary vs acquired) and treatment outcome. V. To determine the effect of selinexor on persistent pain associated with bone metastasis using the brief pain inventory (BPI) short form. VI. To describe the safety profile of selinexor in patients with metastatic castration-resistant prostate cancer. VII. To determine the effect of selinexor on circulating leukocyte exportin 1 (XPO-1) expression, leukocyte gene expression profile and macrophage inhibitory cytokine-1 (MIC-1) messenger ribonucleic acid (mRNA) expression. VIII. To assess serum selinexor trough levels as a function of dose and time since last dose. TERTIARY OBJECTIVES: I. To describe the relationship of XPO-1 expression to PSA decline. II. To describe the expression profile of metastatic tumor and outcome. III. To describe the type of progression (e.g. pain, bone etc). IV. To define XPO-1 expression in patients for whom pre- and post-treatment biopsy is obtained. OUTLINE: Patients receive selinexor orally (PO) on days 1 and 3 of weeks 1-3. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 30 days and then every 6 months thereafter.
Interventions
DRUGSelinexor
Given PO
Sponsors
National Cancer Institute (NCI)
University of California, San Francisco
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Histologically confirmed adenocarcinoma of the prostate * Patients must have castrate levels of testosterone (\< 50 ng/dL) on gonadotropin-releasing hormone (GnRH) analogues or have had prior orchiectomy; GnRH analogues must be continued while on study * Tumor tissue submitted for molecular and genetic analysis through the companion Stand-up 2 Cancer (SU2C) radiologically guided biopsy of abiraterone and/or enzalutamide refractory mCRPC protocol * Patients who consent to participate in the companion biopsy protocol and are subsequently determined to be ineligible for biopsy are eligible to participate in the current protocol * Progressive disease as demonstrated by a rising PSA (at least two determinations) prior to study entry, and/or radiographic evidence of tumor progression in soft tissue according to modified Response Evaluation Criteria In Solid Tumors (RECIST) criteria or identification of new lesions by bone scan (i.e., \>= 2 new lesions) * Primary resistance or acquired resistance (i.e., acquired resistance will be defined as disease progression following a period of response defined as \>= 50% decline in PSA within 12 weeks of starting therapy and not otherwise meeting criteria for primary resistance) to any of the following agents/combinations of therapy: * Abiraterone acetate; primary resistance to abiraterone will be defined as: * No PSA decline * PSA decline less than 50% after 12 weeks of abiraterone therapy * PSA progression within 12 weeks of abiraterone acetate (AA) treatment (by Prostate Cancer Working Group-2 \[PCWG2\] criteria), after initial response to therapy * Objective progression, by RECIST criteria for soft tissue lesions and by modified PCWG2 criteria for bone lesions within 12 weeks of starting abiraterone treatment * Unequivocal clinical progression (per the treating provider's discretion) within 12 weeks of starting abiraterone treatment * Enzalutamide; primary resistance to enzalutamide will be defined as: * No PSA decline * PSA decline less than 50% after 12 weeks of enzalutamide therapy * PSA progression within 12 weeks of enzalutamide treatment (by PCWG2 criteria), after initial response to therapy * Objective progression, by RECIST criteria for soft tissue lesions and by modified PCWG2 criteria for bone lesions within 12 weeks of starting enzalutamide treatment * Unequivocal clinical progression (per the treating provider's discretion) within 12 weeks of starting enzalutamide treatment * Other second-generation investigational anti-androgen/androgen-receptor targeted therapies, including apalutamide (ARN-509); primary resistance will be defined as: * No PSA decline * PSA decline less than 50% after 12 weeks of enzalutamide therapy * PSA progression within 12 weeks of enzalutamide treatment (by PCWG2 criteria), after initial response to therapy * Objective progression, by RECIST criteria for soft tissue lesions and by modified PCWG2 criteria for bone lesions within 12 weeks of starting enzalutamide treatment * Unequivocal clinical progression (per the treating provider's discretion) within 12 weeks of starting enzalutamide treatment * Combination therapy with abiraterone, enzalutamide and/or other second- generation investigational anti-androgen/androgen-receptor targeted therapies, including ARN-509; primary resistance to combination therapy will be defined as: * No PSA decline * PSA decline less than 50% after 12 weeks of abiraterone and enzalutamide therapy * PSA progression within 12 weeks of abiraterone and enzalutamide treatment (by PCWG2 criteria), after initial response to therapy * Objective progression, by RECIST criteria for soft tissue lesions and by modified PCWG2 criteria for bone lesions within 12 weeks of starting abiraterone and enzalutamide treatment * Unequivocal clinical progression (per the treating provider?s discretion) within 12 weeks of starting abiraterone and enzalutamide treatment * Sequenced therapy, including any of the following: * Abiraterone acetate followed by enzalutamide * Primary resistance will be defined per criteria for abiraterone monotherapy primary resistance * Enzalutamide followed by abiraterone acetate * Primary resistance will be defined per criteria for enzalutamide monotherapy primary resistance * Other second-generation investigational anti-androgen/androgen- receptor targeted therapies, including ARN-509 * Primary resistance will be defined per criteria for other investigational anti-androgen monotherapy primary resistance * Presence of 1 or more bone metastasis * Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 * Prior and ongoing zoledronic acid or denosumab therapy is allowed * Prior therapy with radium-223 is allowed * Discontinuation of prior therapy for mCRPC: a washout period of 28 days for the following therapies is required: abiraterone, enzalutamide, fluconazole, itraconazole, flutamide, bicalutamide, nilutamide, and other experimental hormonal agents (ARN509, orteronel \[TAK-700\], etc.), sipuleucel-T (Provenge), other experimental vaccines (PROSTVAC-V/F, etc.), strontium-89, samarium, and radium-223 chloride * Leukocytes \> 3,000/mcL * Absolute neutrophil count \> 1,500/mcL * Platelets \> 125,000/mcL * Hemoglobin \>= 5.59 mmol/L or 9 g/dL; up to 5% deviation is tolerated; transfusions and growth factors are allowed * Total bilirubin within normal institutional limits * Aspartate aminotransferase (AST)(serum glutamic oxaloacetic transaminase \[SGOT\]) \< 3 X institutional upper limit of normal * Alanine aminotransferase (ALT)(serum glutamate pyruvate transaminase \[SGPT\]) \< 3 X institutional upper limit of normal * Creatinine within normal institutional limits OR creatinine clearance \> 60 mL/min/1.73 m\^2 for patients with creatinine levels above institutional normal * Ability to understand a written informed consent document, and the willingness to sign it * Life expectancy of at least 12 weeks * Able to swallow and retain oral medication
Exclusion criteria
* Untreated brain metastases; brain metastases =\< 1 cm and not associated with any focal neurologic deficits are allowed * Prior docetaxel or other chemotherapy for mCRPC; patients who have received docetaxel for metastatic hormone-sensitive prostate cancer are eligible * Active or symptomatic viral hepatitis or chronic liver disease * Clinically significant heart disease as evidenced by myocardial infarction, or arterial thrombotic events in the past 6 months, severe or unstable angina, or New York Heart Association (NYHA) class II-IV heart disease or known cardiac ejection fraction measurement of \< 50 % at baseline * Patients with significantly diseased or obstructed gastrointestinal tract or uncontrolled vomiting or diarrhea or other gastrointestinal disorders (medical disorders or extensive surgery) that may interfere with the absorption of the study agents * Pure small cell carcinoma of the prostate or any mixed histology cancer of the prostate (eg: neuroendocrine) that contains \< 50% adenocarcinoma, as observed on biopsy obtained at the time of diagnosis or on any subsequent biopsies * Any ?currently active? second malignancy, other than non-melanoma skin cancer; patients are not considered to have a currently active? malignancy, if they have completed therapy and are considered by their physician to be at least less than 30% risk of relapse over next year * Any condition, which in the opinion of the investigator, would preclude participation in this trial * Active psychiatric illnesses/social situations that would limit compliance with protocol requirements * Patients in whom urgent treatment with docetaxel is indicated, per clinician discretion; this includes, but is not limited to patients with symptomatic visceral metastatic disease * Uncontrolled infection or concomitant medical illness that is not adequately controlled with current medical management, as determined per clinician discretion * Active bleeding disorders or evidence of evidence of chronic or acute disseminated intravascular coagulation (DIC) * Severely compromised immunological state, including known human immunodeficiency virus (HIV) * Any acute toxicities due to prior anti-cancer treatments and/or radiotherapy that have not resolved to a National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) grade of =\< 1 (except alopecia) * Prior radiation therapy completed \< 3 weeks or single fraction of palliative radiotherapy \< 14 days prior to first dose of KPT-330 (selinexor) * Initiation of bisphosphonate therapy \< 4 weeks prior to first dose of KPT-330; patients receiving bisphosphonate or denosumab therapy must be on stable doses for at least 4 weeks prior to first dose of KPT-330 * Men unable or unwilling to employ 2 forms of highly effective contraception throughout the study and for 8 weeks after the end of study treatment
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Radiographic Progression Free Survival (rPFS) | From study start up to 3 years | Defined as the time from study start until one of the following events occurs: \>= 2 new bone lesions on technetium bone scan; Response Evaluation Criteria in Solid Tumors (RECIST)-defined tumor progression; clinical deterioration requiring a change in prostate cancer therapy, or at clinician discretion; surgery or radiation to treat a prostate cancer related indication; or death from any cause. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Time to PSA Progression | Time between the first evaluation at which the response criteria are met and the first documentation of PSA progression or death or up to 3 years | Time between the first evaluation at which the response criteria are met and the first documentation of PSA (Prostate-Specific Antigen) progression or death. Progression is defined as a rise in PSA of 50% above nadir value or 25% above baseline if there is no decline. |
| Incidence of Non-serious Adverse Events | Up to 3 years after treatment start | Incidence of non-serious adverse events, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0 |
| Comparison of Leukocyte Exportin 1 (XPO-1) and Macrophage Inhibitory Cytokine-1 (MIC-1) Gene Expression Levels Pre- and Post-Selinexor Treatment | On days 1 and 15 of course 1 and on day 1 of courses 2 and 3 | Total RNA isolated from leukocytes of patients will be used for quantitative polymerase chain reaction analysis (qPCR) in order to compare expression levels of XPO-1 and MIC-1 as a function of selinexor dose and total time on treatment. |
| PSA Decline of ≥50% at 12 Weeks Post Therapy Initiation | At 12 weeks post therapy initiation | The number of patients experiencing a PSA decline from baseline of at least 50% in PSA at 12 weeks following the initiation of study therapy. |
| Abiraterone Resistance Status (Primary Versus Acquired) | At baseline | Comparison of radiographic progression free survival between patients with primary abiraterone resistance and acquired abiraterone resistance using a Cox proportional hazards model. |
| Serum Selinexor Levels | At day 1 of course 1, each treatment day until end of treatment up to 3 years | Serum selinexor trough levels as a function of dose and time since last dose |
| Time to Confirmed Development of >= 2 New Bone Lesions That Cannot be Attributable to Bone Scan Flare | At week 8, 16, 24, and every 12 weeks thereafter up to 3 years after treatment start | Defined as time interval between the date of treatment initiation and the date of documented new lesions. Evaluation criteria is defined by the PSAWG2 (Prostate-Specific Antigen Working Group 2) criteria for bone scan evaluation. The time will be 'backdated' to when the \>= 2 new lesions were detected if a second scan is done to confirm progression. |
| Incidence of Serious Adverse Events | Up to 3 years after treatment start | Incidence of serious adverse events, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0 |
| Reduction in Pain for Symptomatic Patients, Measured Using the Brief Pain Inventory (BPI), Short Form | At baseline and day 1 of every following cycle until end of treatment or 3 years after study start | The effect of selinexor on persistent pain associated with bone metastasis, measured using the Brief Pain Inventory (BPI), Short Form. 0 denotes ''no pain'' and 10, ''pain as bad as you can imagine. |
Countries
United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Treatment (Selinexor) BID: twice a day D: day PO: oral 1 cycle = 4 weeks, 28 days
Premedication:
* Ondansetron 8 mg PO every 8 hours on day prior to and day of dosing (D0-D3)
* Olanzapine 5 mg PO at bedtime or 2.5 mg PO BID on day of dosing (D1, D3)
Study drug:
\- Selinexor PO on D1 and D3 of weeks 1-3 of each cycle. Drug holiday on week 4. Courses repeat every 28 days in absence of disease progression or unacceptable toxicity. | 14 |
| Total | 14 |
Baseline characteristics
| Characteristic | Treatment (Selinexor) |
|---|---|
| Age, Customized Age Group 50 - 59 | 1 Participants |
| Age, Customized Age Group 60 - 69 | 3 Participants |
| Age, Customized Age Group 70 - 79 | 10 Participants |
| Ethnicity (NIH/OMB) Hispanic or Latino | 1 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 12 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 1 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 0 Participants |
| Race (NIH/OMB) Asian | 1 Participants |
| Race (NIH/OMB) Black or African American | 0 Participants |
| Race (NIH/OMB) More than one race | 1 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 1 Participants |
| Race (NIH/OMB) White | 11 Participants |
| Region of Enrollment United States | 14 Participants |
| Sex: Female, Male Female | 0 Participants |
| Sex: Female, Male Male | 14 Participants |
Adverse events
| Event type | EG000 affected / at risk |
|---|---|
| deaths Total, all-cause mortality | 0 / 14 |
| other Total, other adverse events | 13 / 14 |
| serious Total, serious adverse events | 4 / 14 |
Outcome results
Primary
Radiographic Progression Free Survival (rPFS)
Defined as the time from study start until one of the following events occurs: \>= 2 new bone lesions on technetium bone scan; Response Evaluation Criteria in Solid Tumors (RECIST)-defined tumor progression; clinical deterioration requiring a change in prostate cancer therapy, or at clinician discretion; surgery or radiation to treat a prostate cancer related indication; or death from any cause.
Time frame: From study start up to 3 years
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| Treatment (Selinexor) | Radiographic Progression Free Survival (rPFS) | 31 weeks |
Secondary
Abiraterone Resistance Status (Primary Versus Acquired)
Comparison of radiographic progression free survival between patients with primary abiraterone resistance and acquired abiraterone resistance using a Cox proportional hazards model.
Time frame: At baseline
Population: The study was terminated due to unacceptable toxicity. Data on resistance type was not collected.
Secondary
Comparison of Leukocyte Exportin 1 (XPO-1) and Macrophage Inhibitory Cytokine-1 (MIC-1) Gene Expression Levels Pre- and Post-Selinexor Treatment
Total RNA isolated from leukocytes of patients will be used for quantitative polymerase chain reaction analysis (qPCR) in order to compare expression levels of XPO-1 and MIC-1 as a function of selinexor dose and total time on treatment.
Time frame: On days 1 and 15 of course 1 and on day 1 of courses 2 and 3
Population: The study was terminated due to unacceptable toxicity. Data was not collected.
Secondary
Incidence of Non-serious Adverse Events
Incidence of non-serious adverse events, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0
Time frame: Up to 3 years after treatment start
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Night blindness | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Watering eyes | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Lung infection | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Upper respiratory infection | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Urinary tract infection | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hot flashes | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Blurred vision | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Anorexia | 14 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hypophosphatemia | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Metabolism and nutrition disorders - Other | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Eye pain | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hypocalcemia | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hyponatremia | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Weight loss | 7 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Platelet count decreased | 6 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | INR increased | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Investigations - Other | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Neutrophil count decreased | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Nausea | 14 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Vomiting | 7 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Constipation | 5 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Diarrhea | 6 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Abdominal distension | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Abdominal pain | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Flatulence | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Gastrointestinal disorders - Other | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Fatigue | 11 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Pain | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Localized edema | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Anemia | 10 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Blood and lymphatic system disorders - Other | 4 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Bone pain | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Pain in extremity | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Arthralgia | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Musculoskeletal/connective tissue disorder, other | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Dizziness | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Presyncope | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Headache | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hypotension | 5 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Insomnia | 3 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Psychosis | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Cough | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Dyspnea | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Voice alteration | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Cardiac disorders - Other | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Chest pain - cardiac | 1 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Skin and subcutaneous tissue disorders - Other | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Alopecia | 2 events |
| Treatment (Selinexor) | Incidence of Non-serious Adverse Events | Hematuria | 1 events |
Secondary
Incidence of Serious Adverse Events
Incidence of serious adverse events, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0
Time frame: Up to 3 years after treatment start
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| Treatment (Selinexor) | Incidence of Serious Adverse Events | Anemia | 1 events |
| Treatment (Selinexor) | Incidence of Serious Adverse Events | Eye disorders - Other | 2 events |
Secondary
PSA Decline of ≥50% at 12 Weeks Post Therapy Initiation
The number of patients experiencing a PSA decline from baseline of at least 50% in PSA at 12 weeks following the initiation of study therapy.
Time frame: At 12 weeks post therapy initiation
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Treatment (Selinexor) | PSA Decline of ≥50% at 12 Weeks Post Therapy Initiation | 1 Participants |
Secondary
Reduction in Pain for Symptomatic Patients, Measured Using the Brief Pain Inventory (BPI), Short Form
The effect of selinexor on persistent pain associated with bone metastasis, measured using the Brief Pain Inventory (BPI), Short Form. 0 denotes ''no pain'' and 10, ''pain as bad as you can imagine.
Time frame: At baseline and day 1 of every following cycle until end of treatment or 3 years after study start
Population: The study was terminated due to unacceptable toxicity. Only baseline data was collected.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| Treatment (Selinexor) | Reduction in Pain for Symptomatic Patients, Measured Using the Brief Pain Inventory (BPI), Short Form | 1.34 units on a scale |
Secondary
Serum Selinexor Levels
Serum selinexor trough levels as a function of dose and time since last dose
Time frame: At day 1 of course 1, each treatment day until end of treatment up to 3 years
Population: The study was terminated due to unacceptable toxicity. Data was not collected.
Secondary
Time to Confirmed Development of >= 2 New Bone Lesions That Cannot be Attributable to Bone Scan Flare
Defined as time interval between the date of treatment initiation and the date of documented new lesions. Evaluation criteria is defined by the PSAWG2 (Prostate-Specific Antigen Working Group 2) criteria for bone scan evaluation. The time will be 'backdated' to when the \>= 2 new lesions were detected if a second scan is done to confirm progression.
Time frame: At week 8, 16, 24, and every 12 weeks thereafter up to 3 years after treatment start
Population: The study was terminated due to unacceptable toxicity. Data was not collected.
Secondary
Time to PSA Progression
Time between the first evaluation at which the response criteria are met and the first documentation of PSA (Prostate-Specific Antigen) progression or death. Progression is defined as a rise in PSA of 50% above nadir value or 25% above baseline if there is no decline.
Time frame: Time between the first evaluation at which the response criteria are met and the first documentation of PSA progression or death or up to 3 years
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| Treatment (Selinexor) | Time to PSA Progression | 12 weeks |