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A Study to Evaluate the Safety and Efficacy of Selinexor With or Without Pembrolizumab Versus Standard of Care in Previously Treated Metastatic Colorectal Cancer With RAS Mutations

A Phase 2 Open-Label Multicenter Study to Evaluate the Safety and Efficacy of Selinexor With or Without Pembrolizumab Versus Standard of Care in Previously Treated Metastatic Colorectal Cancer With RAS Mutations

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04854434
Enrollment
13
Registered
2021-04-22
Start date
2021-06-29
Completion date
2022-06-24
Last updated
2023-11-03

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

Conditions

Metastatic Colorectal Cancer

Brief summary

The purpose of this study is to evaluate the efficacy and safety of selinexor alone or with pembrolizumab in participants with advanced or metastatic colorectal cancer (CRC). Approximately 78 participants with advanced or metastatic CRC will be enrolled, and randomized (1:1:1) into three arms A (selinexor only), B (selinexor and pembrolizumab), and C (standard of care \[Combination of trifluridine and tipiracil\]). Randomization will be based on stratification factors: Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 versus 2. The end of treatment (EoT) visit will occur less than or equal to (\<=30) days post-treatment discontinuation. A survival follow-up visit will be performed every 3 months from EoT and will continue for 12 months.

Interventions

DRUGSelinexor

Participants will receive selinexor oral tablets.

DRUGPembrolizumab

Participants will receive pembrolizumab intravenously.

Participants will receive trifluridine oral tablets as SOC.

DRUGTipiracil

Participants will receive tipiracil oral tablets as SOC.

Sponsors

Karyopharm Therapeutics Inc
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Participants have histologically proven diagnosis of unresectable metastatic colorectal cancer with a known rat sarcoma (RAS) mutation. * Participants have measurable disease according to RECIST 1.1 criteria. * Have received 2-3 prior lines of systemic anticancer treatment (adjuvant or neoadjuvant therapy is not counted as one line of systemic therapy). * Participants with stable previously treated brain metastases are allowed. * ECOG performance status of 0-2 at the time of screening. * Age ≥ 18 years at the time of signing informed consent * Life expectancy of at least 3 months. * Female participants of childbearing potential must agree to use dual methods of contraception and have a negative serum pregnancy test at screening, and male participants must use an effective barrier method of contraception if sexually active throughout the study and for 4 months after the last dose of selinexor or pembrolizumab or 6 months after trifluridine and tipiracil. * Written informed consent signed in accordance with federal, local, and institutional guidelines.

Exclusion criteria

* Prior treatment with a selective inhibitor of nuclear export (SINE) compound or selinexor. * Prior treatment with immune checkpoint inhibitors. * Participants with microsatellite instability high (MSI-H) or deficient mismatch repair (dMMR). * Known allergy to any of study drugs (selinexor, pembrolizumab, and trifluridine and tipiracil) or the excipient of pembrolizumab. * Significant cardiovascular impairment, defined as: * Left ventricular ejection fraction ≤ 40 percent (%) * Active congestive heart failure (New York Heart Association \[NYHA\]) Class ≥ 3 * Unstable angina or myocardial infarction within 3 months of enrollment * Serious and potentially life-threatening arrhythmia * Impaired hematopoietic function (any of the following would result in exclusion): * Absolute neutrophil count (ANC) less than (\<) 1500/cubic millimeter (mm\^3) * Platelet count \< 100,000/ mm\^3 * Hemoglobin (Hb) \< 10 gram per deciliter (g/dL) * Significant renal impairment, defined as: calculated creatinine clearance (CrCl) of \< 30 milliliter per minute (mL/min) using the formula of Cockcroft and Gault. * Impaired hepatic function defined as: total bilirubin greater than (\>) 1.5 × upper limit of normal (ULN) and aspartate transaminase (AST) \> 2.5 x ULN, AST \> 2.5 x ULN; for Arm B, unless bilirubin elevation is related to Gilbert's Syndrome for which bilirubin must be ≤ 4 x ULN. * Participants with a diagnosis of immunodeficiency or are receiving systemic steroid therapy (\>10 mg/day of prednisone or equivalent) or any other form of immunosuppressive therapy. Participants with active autoimmune disease requiring systemic treatment during the past 2 years. * Participants with controlled type I and type II diabetes mellitus, and endocrinopathies such as hypothyroidism on stable hormone replacement, skin disorders (such as vitiligo, psoriasis, or alopecia) not requiring systemic treatment, or conditions not expected to recur in the absence of an external trigger are allowed. Note: The Investigator needs to evaluate the participants medical history to confirm that they are eligible to receive the combination with pembrolizumab per these criteria. * Insufficient time since or not recovered from procedures or anti-cancer therapy, defined as: * Not recovered from major surgery ≤ 21 days prior to Day 1 dosing. Minor procedures, such as biopsies, dental work, or placement of a port or IV line for infusion are permitted. * Have ongoing clinically significant anti-cancer therapy-related toxicities Common Terminology Criteria for Adverse Events (CTCAE) Grade \> 1. In specific cases, participants whose toxicity has stabilized or with Grade 2 non-hematologic toxicities can be allowed following documented approval by the Sponsor's Medical Monitor. * Had last dose of previous anti-cancer therapy ≤14 days prior to Day 1 dosing. * Palliative radiotherapy \> 14 days prior to the study is allowed. * Received investigational drugs in other clinical trials within 28 days, or 5 half-lives of the investigational drug (whichever is shorter), prior to Cycle 1 Day 1 (C1D1). * Live-attenuated vaccine against an infectious disease (e.g., nasal spray influenza vaccine) ≤ 14 days prior to the intended C1D1. * Female participants who are pregnant or lactating. * Active, ongoing or uncontrolled active infection requiring parenteral antibiotics, antivirals, antifungals within 1 week of Screening. * Participants with autoimmune disease, a medical condition that requires systemic corticosteroids or other immunosuppressive medication; or a history of interstitial lung disease. * Any gastrointestinal dysfunctions that could interfere with the absorption of selinexor (e.g. bowel obstruction, inability to swallow tablets, malabsorption syndrome, unresolved nausea, vomiting, diarrhea CTCAE \> grade 1). * In the opinion of the investigator, participants who are below their ideal body weight and would be unduly impacted by changes in their weight. * Serious psychiatric or medical conditions that could interfere with participation in the study or in the opinion of the Investigator would make study involvement unreasonably hazardous. * Concurrent therapy with approved or investigational anticancer therapeutic including topical therapies.

Design outcomes

Primary

MeasureTime frameDescription
Arm B and C: Progression-free Survival (PFS) as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1From the date of randomization until disease progression or death, whichever occurs first (up to 8 months)PFS was defined as the time from the date of randomization until disease progression or death due to any cause, whichever occurs first. PFS was assessed by the investigator per RECIST 1.1. As per RECIST 1.1 criteria, PD was defined as at least a 20% increase in the sum of the longest diameter (SLD), taking as reference the smallest sum of the longest diameter (SLD) recorded from baseline or the appearance of 1 or more new lesions.

Secondary

MeasureTime frameDescription
Arm B and C: Overall Response Rate (ORR)From the date of randomization until the documentation of CR or PR, whichever occurs first (up to 8 months)ORR was defined as the percentage of participants who achieve complete response (CR) or partial response (PR) or or initiating a new antineoplastic therapy. ORR was assessed by RECIST 1.1 as defined by the Investigator based on radiologic criteria. Per RECIST 1.1 criteria, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Arm A and C: Overall Response Rate (ORR)From the date of randomization until the documentation of CR or PR, whichever occurs first (up to 8 months)ORR was defined as the percentage of participants who achieve CR or PR or or initiating a new antineoplastic therapy. ORR was assessed by RECIST 1.1 as defined by the Investigator based on radiologic criteria. Per RECIST 1.1 criteria, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Arm A, B and C: Progression-free Survival (PFS) at 6 MonthsAt 6 MonthsPFS at 6 months was defined as the time from the date of randomization without disease progression at 6 months as assessed by the investigator per RECIST 1.1. As per RECIST 1.1 criteria, PD was defined as at least a 20% increase in the sum of the longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions.
Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 6 MonthsAt 6 MonthsOS was defined as the time from the first dose date to date of death due to any cause. Participant was considered as event (overall survival) free if participant was not died and was alive at 6 months.
Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 12 MonthsAt 12 MonthsOS was defined as the time from the first dose date to date of death due to any cause. Participant was considered as event (overall survival) free if participant was not died and was alive at 12 months.
Arm A, B and C: Overall Survival (OS)From the date of randomization up to death (up to 8 months)OS was defined as time from the date of randomization to death due to any cause.
Arm A and C: Duration of Response (DOR) Based on Response Evaluation Criteria in Solid Tumors Version 1.1From first occurrence of CR or PR until disease progression or death, whichever occurs first (up to 8 months)DOR was defined as the time from first occurrence of CR or PR until the first date of PD per RECIST version 1.1 or death. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Arm B and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.1From the date of randomization up to death (up to 8 months)Disease control rate was defined as participants who achieved best overall response of CR, PR, or at least 12 continuous weeks of stable disease (SD) as assessed by investigator as per RECIST v 1.1. As per RECIST v 1.1 before PD or initiating a new antineoplastic therapy, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (at least a 20% increase in the sum of diameters of target lesions) taking as reference the smallest sum diameters while on study.
Arm A and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.1From the date of randomization up to death (up to 8 months)Disease control rate was defined as participants who achieved best overall response of CR, PR, or at least 12 continuous weeks of stable disease (SD) as assessed by investigator as per RECIST v 1.1. As per RECIST v 1.1 before PD or initiating a new antineoplastic therapy, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (at least a 20% increase in the sum of diameters of target lesions) taking as reference the smallest sum diameters while on study.
Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsFrom start of study drug administration up to 12 monthsAn adverse event was defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of study treatment, whether or not considered related to the study treatment. A SAE was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. A TEAE was defined as those AEs that develop or worsen after the first dose of study drug. TEAEs included both serious and non-serious TEAEs.
Arm B and C: Duration of Response (DOR) Based on Response Evaluation Criteria in Solid Tumors Version 1.1From first occurrence of CR or PR until disease progression or death, whichever occurs first (up to 8 months)DOR was defined as the time from first occurrence of CR or PR until the first date of PD per RECIST version 1.1 or death. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Countries

United States

Participant flow

Recruitment details

The study was conducted at 3 investigational sites in the United States.

Pre-assignment details

A total of 13 participants were enrolled and randomized to receive study treatments Arm A (single-agent selinexor), Arm B (selinexor + pembrolizumab), or Arm C (standard of care) based on the stratification factor of Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 versus 2.

Participants by arm

ArmCount
Arm A: Selinexor 80 mg
Participants received a single dose of selinexor 80 mg (4 tablets of 20 mg) orally QW on Day 1 of each week of a 42-day cycle (i.e., on Days 1, 8, 15, 22, 29, and 36 of each 42-day cycle) until PD, intolerable toxicity, or withdrawal from the study (maximum exposure: 33 weeks).
4
Arm B: Selinexor 80 mg and Pembrolizumab 400 mg
Participants received a single dose of selinexor 80 mg (4 tablets of 20 mg) orally QW on Day 1 of each week of a 42-day cycle (i.e., on Days 1, 8, 15, 22, 29, and 36 of each 42-day cycle) in combination with pembrolizumab 400 mg IV once every 6 weeks of each 42-day cycle until PD, intolerable toxicity, or withdrawal from the study (maximum exposure: 30 weeks).
5
Arm C: Standard of Care (SOC)
Participants received combination of trifluridine and tipiracil 35 mg/m\^2/dose tablets orally BID (maximum 80 mg per dose) as SOC on Days 1 through 5 and Days 8 through 12 of each 28-day cycle until PD, intolerable toxicity, or withdrawal from the study (maximum exposure: 11 weeks).
4
Total13

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyDeath134
Overall StudyOther110
Overall StudyStudy Terminated by Sponsor200

Baseline characteristics

CharacteristicTotalArm C: Standard of Care (SOC)Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A: Selinexor 80 mg
Age, Continuous62.7 years
STANDARD_DEVIATION 13.61
57.0 years
STANDARD_DEVIATION 17.63
61.0 years
STANDARD_DEVIATION 14.78
70.5 years
STANDARD_DEVIATION 3.11
Ethnicity (NIH/OMB)
Hispanic or Latino
3 Participants2 Participants0 Participants1 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
10 Participants2 Participants5 Participants3 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
12 Participants4 Participants5 Participants3 Participants
Sex: Female, Male
Female
6 Participants1 Participants4 Participants1 Participants
Sex: Female, Male
Male
7 Participants3 Participants1 Participants3 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
1 / 43 / 54 / 4
other
Total, other adverse events
4 / 45 / 54 / 4
serious
Total, serious adverse events
1 / 42 / 50 / 4

Outcome results

Primary

Arm B and C: Progression-free Survival (PFS) as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1

PFS was defined as the time from the date of randomization until disease progression or death due to any cause, whichever occurs first. PFS was assessed by the investigator per RECIST 1.1. As per RECIST 1.1 criteria, PD was defined as at least a 20% increase in the sum of the longest diameter (SLD), taking as reference the smallest sum of the longest diameter (SLD) recorded from baseline or the appearance of 1 or more new lesions.

Time frame: From the date of randomization until disease progression or death, whichever occurs first (up to 8 months)

Population: Prior to study completion, the signal was assessed by sponsor to be uncompetitive in the current treatment landscape and thus the colorectal cancer (CRC) program was closed. Data for this outcome measure was not planned to be collected and analyzed for Arm A.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm B and C: Progression-free Survival (PFS) as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1NA Months
Arm C: Standard of Care (SOC)Arm B and C: Progression-free Survival (PFS) as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1NA Months
Secondary

Arm A and C: Duration of Response (DOR) Based on Response Evaluation Criteria in Solid Tumors Version 1.1

DOR was defined as the time from first occurrence of CR or PR until the first date of PD per RECIST version 1.1 or death. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: From first occurrence of CR or PR until disease progression or death, whichever occurs first (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Here, overall number of participants analyzed signifies those who had response (CR/PR) in specified arm. Data for this outcome measure was not planned to be collected and analyzed for Arm B.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A and C: Duration of Response (DOR) Based on Response Evaluation Criteria in Solid Tumors Version 1.1NA months
Secondary

Arm A and C: Overall Response Rate (ORR)

ORR was defined as the percentage of participants who achieve CR or PR or or initiating a new antineoplastic therapy. ORR was assessed by RECIST 1.1 as defined by the Investigator based on radiologic criteria. Per RECIST 1.1 criteria, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: From the date of randomization until the documentation of CR or PR, whichever occurs first (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Data for this outcome measure was not planned to be collected and analyzed for Arm B.

ArmMeasureValue (NUMBER)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A and C: Overall Response Rate (ORR)25.0 percentage of participants
Arm C: Standard of Care (SOC)Arm A and C: Overall Response Rate (ORR)0 percentage of participants
Secondary

Arm A and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.1

Disease control rate was defined as participants who achieved best overall response of CR, PR, or at least 12 continuous weeks of stable disease (SD) as assessed by investigator as per RECIST v 1.1. As per RECIST v 1.1 before PD or initiating a new antineoplastic therapy, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (at least a 20% increase in the sum of diameters of target lesions) taking as reference the smallest sum diameters while on study.

Time frame: From the date of randomization up to death (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Here, overall number of participants analyzed signifies those who had response (CR/PR/SD) in specified arm. Data for this outcome measure was not planned to be collected and analyzed for Arm B.

ArmMeasureValue (NUMBER)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.1100 percentage of participants
Secondary

Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEs

An adverse event was defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of study treatment, whether or not considered related to the study treatment. A SAE was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. A TEAE was defined as those AEs that develop or worsen after the first dose of study drug. TEAEs included both serious and non-serious TEAEs.

Time frame: From start of study drug administration up to 12 months

Population: Safety population included all participants who were assigned to study treatment and who received greater than or equal to 1 dose of study drug.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with TEAEs4 Participants
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with Serious TEAEs1 Participants
Arm C: Standard of Care (SOC)Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with TEAEs5 Participants
Arm C: Standard of Care (SOC)Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with Serious TEAEs2 Participants
Arm C: Standard of Care (SOC)Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with Serious TEAEs0 Participants
Arm C: Standard of Care (SOC)Arm A, B and C: Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious TEAEsParticipants with TEAEs4 Participants
Secondary

Arm A, B and C: Overall Survival (OS)

OS was defined as time from the date of randomization to death due to any cause.

Time frame: From the date of randomization up to death (up to 8 months)

Population: Prior to study completion, the signal was assessed by sponsor to be uncompetitive in the current treatment landscape and thus CRC program was closed.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Overall Survival (OS)NA months
Arm C: Standard of Care (SOC)Arm A, B and C: Overall Survival (OS)NA months
Arm C: Standard of Care (SOC)Arm A, B and C: Overall Survival (OS)NA months
Secondary

Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 12 Months

OS was defined as the time from the first dose date to date of death due to any cause. Participant was considered as event (overall survival) free if participant was not died and was alive at 12 months.

Time frame: At 12 Months

Population: Prior to study completion, the signal was assessed by sponsor to be uncompetitive in the current treatment landscape and thus CRC program was closed.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Percentage of Participants With Overall Survival (OS) at 12 MonthsNA percentage of event free participants
Arm C: Standard of Care (SOC)Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 12 MonthsNA percentage of event free participants
Arm C: Standard of Care (SOC)Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 12 MonthsNA percentage of event free participants
Secondary

Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 6 Months

OS was defined as the time from the first dose date to date of death due to any cause. Participant was considered as event (overall survival) free if participant was not died and was alive at 6 months.

Time frame: At 6 Months

Population: Prior to study completion, the signal was assessed by sponsor to be uncompetitive in the current treatment landscape and thus CRC program was closed.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Percentage of Participants With Overall Survival (OS) at 6 MonthsNA percentage of event free participants
Arm C: Standard of Care (SOC)Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 6 MonthsNA percentage of event free participants
Arm C: Standard of Care (SOC)Arm A, B and C: Percentage of Participants With Overall Survival (OS) at 6 MonthsNA percentage of event free participants
Secondary

Arm A, B and C: Progression-free Survival (PFS) at 6 Months

PFS at 6 months was defined as the time from the date of randomization without disease progression at 6 months as assessed by the investigator per RECIST 1.1. As per RECIST 1.1 criteria, PD was defined as at least a 20% increase in the sum of the longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions.

Time frame: At 6 Months

Population: Prior to study completion, the signal was assessed by sponsor to be uncompetitive in the current treatment landscape and thus CRC program was closed.

ArmMeasureValue (MEDIAN)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm A, B and C: Progression-free Survival (PFS) at 6 MonthsNA months
Arm C: Standard of Care (SOC)Arm A, B and C: Progression-free Survival (PFS) at 6 MonthsNA months
Arm C: Standard of Care (SOC)Arm A, B and C: Progression-free Survival (PFS) at 6 MonthsNA months
Secondary

Arm B and C: Duration of Response (DOR) Based on Response Evaluation Criteria in Solid Tumors Version 1.1

DOR was defined as the time from first occurrence of CR or PR until the first date of PD per RECIST version 1.1 or death. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: From first occurrence of CR or PR until disease progression or death, whichever occurs first (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Here, overall number of participants analyzed signifies those who had response (CR/PR) in specified arm. Data for this outcome measure was not planned to be collected and analyzed for Arm A.

Secondary

Arm B and C: Overall Response Rate (ORR)

ORR was defined as the percentage of participants who achieve complete response (CR) or partial response (PR) or or initiating a new antineoplastic therapy. ORR was assessed by RECIST 1.1 as defined by the Investigator based on radiologic criteria. Per RECIST 1.1 criteria, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) had reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: From the date of randomization until the documentation of CR or PR, whichever occurs first (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Data for this outcome measure was not planned to be collected and analyzed for Arm A.

ArmMeasureValue (NUMBER)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm B and C: Overall Response Rate (ORR)0 percentage of participants
Arm C: Standard of Care (SOC)Arm B and C: Overall Response Rate (ORR)0 percentage of participants
Secondary

Arm B and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.1

Disease control rate was defined as participants who achieved best overall response of CR, PR, or at least 12 continuous weeks of stable disease (SD) as assessed by investigator as per RECIST v 1.1. As per RECIST v 1.1 before PD or initiating a new antineoplastic therapy, CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (at least a 20% increase in the sum of diameters of target lesions) taking as reference the smallest sum diameters while on study.

Time frame: From the date of randomization up to death (up to 8 months)

Population: ITT population included all participants randomized to study treatment and were analyzed in the treatment arm to which they were randomized. Here, overall number of participants analyzed signifies those who had response (CR/PR/SD) in specified arm. Data for this outcome measure was not planned to be collected and analyzed for Arm A.

ArmMeasureValue (NUMBER)
Arm B: Selinexor 80 mg and Pembrolizumab 400 mgArm B and C: Percentage of Participants With Confirmed Disease Control Rate as Per Response Evaluation Criteria in Solid Tumors Version 1.140.0 percentage of participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026