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Study of Pembrolizumab (MK-3475) Monotherapy in Locally Advanced/Metastatic Renal Cell Carcinoma (MK-3475-427/KEYNOTE-427)

A Phase II Single-arm, Open-label Monotherapy Clinical Trial of Pembrolizumab (MK-3475) in Locally Advanced/Metastatic Renal Cell Carcinoma (mRCC) (KEYNOTE-427)

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02853344
Enrollment
275
Registered
2016-08-02
Start date
2016-09-30
Completion date
2022-04-01
Last updated
2023-04-11

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

Conditions

Renal Cell Carcinoma

Keywords

Programmed Cell Death-1 (PD1, PD-1), Programmed Cell Death 1 Ligand 1(PDL1, PD-L1), Programmed Cell Death 1 Ligand 2 (PDL2, PD-L2)

Brief summary

The purpose of this study is to assess the safety and efficacy of monotherapy pembrolizumab (MK-3475) in participants with renal cell carcinoma (RCC). There will be two cohorts in this study: Cohort A will consist of participants with clear cell (cc) RCC and Cohort B will consist of participants with non-clear cell (ncc) RCC.

Interventions

BIOLOGICALPembrolizumab

IV infusion

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Cohort A (clear cell RCC cohort) participant must have histologically confirmed diagnosis of clear cell RCC or RCC with clear cell component (with or without sarcomatoid features). * Cohort B (non-clear cell RCC cohort) participant must have histologically confirmed diagnosis of non-clear cell RCC (with or without sarcomatoid features). Participants with tumors that have a component of clear cell histology are not eligible for inclusion in Cohort B. * Has locally advanced/metastatic disease, i.e., newly diagnosed Stage IV RCC per American Joint Committee on Cancer (AJCC) or have recurrent disease. * Has measurable disease per RECIST 1.1 as assessed by BICR. * Has received no prior systemic therapy for advanced RCC. Prior neoadjuvant/adjuvant therapy for RCC is acceptable if completed \>12 months prior to allocation. * Must provide adequate tissue for biomarker analysis for Cohorts A and B from an archival tissue sample or newly obtained core or excisional biopsy of a tumor lesion not previously irradiated. * Participants receiving bone resorptive therapy (including but not limited to bisphosphonate or RANK-L inhibitor) must have therapy initiated at least 2 weeks prior to treatment allocation. * Has Karnofsky Performance Status (KPS) ≥70%, as assessed within 10 days prior to treatment allocation. * Demonstrates adequate organ function. * Female participants of childbearing potential must be willing to use an adequate method of contraception for the course of the study through 120 days after the last dose of study drug. * Male participants of childbearing potential must agree to use an adequate method of contraception starting with the first dose of study drug through 120 days after the last dose of study drug.

Exclusion criteria

* Is currently participating in or has participated in a study of an investigational agent or using an investigational device within 4 weeks prior to allocation, has had major surgery within 4 weeks or radiation therapy within 2 weeks prior to allocation, or who has not recovered (i.e., ≤ Grade 1 or to Baseline) from AEs due to prior treatment. * Had prior treatment with any anti-programmed cell death 1 (anti-PD-1), or anti-programmed cell death ligand 1 (PD-L1), or PD-L2 agent or an antibody targeting any other immune-regulatory receptors or mechanisms. Examples of such antibodies include antibodies against indoleamine-2,3-dioxygenase (IDO), PD-L1, interleukin 2 receptors (IL-2R), glucocorticoid-induced tumor necrosis factor receptor-related protein (GITR). * Has a diagnosis of immunodeficiency OR is receiving a systemic steroid therapy exceeding 10 mg daily dose of prednisone or equivalent or any other form of immunosuppressive therapy within 7 days prior to allocation, except in the case of central nervous system (CNS) metastases (see below). * Has an active autoimmune disease requiring systemic treatment within the past 2 years OR a documented history of clinically severe autoimmune disease. * Has a known additional malignancy that has had progression or has required active treatment in the last 3 years. Note: Basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ, such as breast cancer in situ, that has undergone potentially curative therapy are acceptable. * Has known active CNS metastases and/or carcinomatous meningitis. * Has a history of (non-infectious) pneumonitis that required steroids or current pneumonitis. * Has an active infection requiring systemic therapy. * Has a known history of Human Immunodeficiency Virus (HIV) infection. * Has known history of Hepatitis B or known active Hepatitis C. * Has received a live virus vaccine within 30 days of allocation. * Has had a prior solid organ transplant. * Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of study drug.

Design outcomes

Primary

MeasureTime frameDescription
Objective Response Rate (ORR)Up to approximately 52 monthsORR was defined as the percentage of participants who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions) as assessed by Blinded Independent Central Review (BICR) per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1).

Secondary

MeasureTime frameDescription
Disease Control Rate (DCR)Up to approximately 66 monthsDCR is defined as the percentage of participants who have achieved CR, PR, or Stable Disease (SD) for at least 6 months based on assessments by the BICR per RECIST 1.1. CR is defined as disappearance of all target lesions, PR is defined as at least a 30% decrease in the sum of diameters of target lesions, SD is defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD): At least a 20% increase in the sum of diameters of target lesions and an absolute increase of at least 5 mm. The appearance of one or more new lesions is also considered PD.
Progression-free Survival (PFS)Up to approximately 66 monthsPFS is defined as the time from first dose of study treatment to the first documented progressive disease (PD) per RECIST 1.1 based on BICR, or death due to any cause, whichever occurs first. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD.
Duration of Response (DOR)Up to approximately 66 monthsFor participants who demonstrated a confirmed Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1, DOR was defined as the time from first documented evidence of a CR or PR until progressive disease (PD) or death. DOR for participants who had not progressed or died at the time of analysis was to be censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions as well as an absolute increase of at least 5 mm in the sum of diameters. The appearance of one or more new lesions was also considered PD. DOR assessments were based on BICR with confirmation. The DOR as assessed using RECIST 1.1 for all participants who experienced a confirmed CR or PR is presented.
Number of Participants Who Experienced an Adverse Event (AE)Up to approximately 27 monthsAn adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure.
Number of Participants Who Discontinued Study Drug Due to an AEUp to approximately 24 monthsAn adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure.
Overall SurvivalUp to approximately 66 monthsOS was defined as the time from first dose of study treatment to death due to any cause

Participant flow

Participants by arm

ArmCount
Cohort A: Clear Cell Renal Cell Carcinoma (ccRCC)
Participants with ccRCC received pembrolizumab 200 mg intravenously (IV) every 3 weeks (Q3W) for up to 35 doses (approximately 24 months).
110
Cohort B: Non-clear Cell RCC (nccRCC)
Participants with nccRCC received pembrolizumab 200 mg IV Q3W for up to 35 doses (approximately 24 months).
165
Total275

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyDeath70112
Overall StudyLost to Follow-up11
Overall StudyParticipation in Study Terminated by Sponsor3748
Overall StudyWithdrawal by Subject24

Baseline characteristics

CharacteristicCohort B: Non-clear Cell RCC (nccRCC)TotalCohort A: Clear Cell Renal Cell Carcinoma (ccRCC)
Age, Continuous60.0 Years
STANDARD_DEVIATION 12.3
61.1 Years
STANDARD_DEVIATION 11.8
62.9 Years
STANDARD_DEVIATION 11
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants3 Participants2 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
156 Participants260 Participants104 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
8 Participants12 Participants4 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants2 Participants1 Participants
Race (NIH/OMB)
Asian
17 Participants28 Participants11 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants1 Participants0 Participants
Race (NIH/OMB)
White
145 Participants243 Participants98 Participants
Sex: Female, Male
Female
56 Participants80 Participants24 Participants
Sex: Female, Male
Male
109 Participants195 Participants86 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
71 / 110113 / 1650 / 30 / 5
other
Total, other adverse events
105 / 110142 / 1653 / 33 / 5
serious
Total, serious adverse events
52 / 11047 / 1650 / 30 / 5

Outcome results

Primary

Objective Response Rate (ORR)

ORR was defined as the percentage of participants who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions) as assessed by Blinded Independent Central Review (BICR) per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1).

Time frame: Up to approximately 52 months

Population: All allocated participants who received at least one dose of study treatment

ArmMeasureValue (NUMBER)
Cohort A: Clear Cell RCC (ccRCC)Objective Response Rate (ORR)36.4 Percentage of Participants
Cohort B: Non-clear Cell RCC (nccRCC)Objective Response Rate (ORR)26.7 Percentage of Participants
Secondary

Disease Control Rate (DCR)

DCR is defined as the percentage of participants who have achieved CR, PR, or Stable Disease (SD) for at least 6 months based on assessments by the BICR per RECIST 1.1. CR is defined as disappearance of all target lesions, PR is defined as at least a 30% decrease in the sum of diameters of target lesions, SD is defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD): At least a 20% increase in the sum of diameters of target lesions and an absolute increase of at least 5 mm. The appearance of one or more new lesions is also considered PD.

Time frame: Up to approximately 66 months

Population: All allocated participants who received at least one dose of study treatment.

ArmMeasureValue (NUMBER)
Cohort A: Clear Cell RCC (ccRCC)Disease Control Rate (DCR)58.2 Percentage of Participants
Cohort B: Non-clear Cell RCC (nccRCC)Disease Control Rate (DCR)43.0 Percentage of Participants
Secondary

Duration of Response (DOR)

For participants who demonstrated a confirmed Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1, DOR was defined as the time from first documented evidence of a CR or PR until progressive disease (PD) or death. DOR for participants who had not progressed or died at the time of analysis was to be censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions as well as an absolute increase of at least 5 mm in the sum of diameters. The appearance of one or more new lesions was also considered PD. DOR assessments were based on BICR with confirmation. The DOR as assessed using RECIST 1.1 for all participants who experienced a confirmed CR or PR is presented.

Time frame: Up to approximately 66 months

Population: All allocated participants who received at least one dose of study treatment and had confirmed complete response or partial response.

ArmMeasureValue (MEDIAN)
Cohort A: Clear Cell RCC (ccRCC)Duration of Response (DOR)18.9 Months
Cohort B: Non-clear Cell RCC (nccRCC)Duration of Response (DOR)29.0 Months
Secondary

Number of Participants Who Discontinued Study Drug Due to an AE

An adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure.

Time frame: Up to approximately 24 months

Population: All allocated participants who received at least one dose of study treatment

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cohort A: Clear Cell RCC (ccRCC)Number of Participants Who Discontinued Study Drug Due to an AE23 Participants
Cohort B: Non-clear Cell RCC (nccRCC)Number of Participants Who Discontinued Study Drug Due to an AE25 Participants
Secondary

Number of Participants Who Experienced an Adverse Event (AE)

An adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure.

Time frame: Up to approximately 27 months

Population: All allocated participants who received at least one dose of study treatment

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cohort A: Clear Cell RCC (ccRCC)Number of Participants Who Experienced an Adverse Event (AE)109 Participants
Cohort B: Non-clear Cell RCC (nccRCC)Number of Participants Who Experienced an Adverse Event (AE)155 Participants
Secondary

Overall Survival

OS was defined as the time from first dose of study treatment to death due to any cause

Time frame: Up to approximately 66 months

Population: All allocated participants who received at least one dose of study treatment

ArmMeasureValue (MEDIAN)
Cohort A: Clear Cell RCC (ccRCC)Overall Survival40.7 Months
Cohort B: Non-clear Cell RCC (nccRCC)Overall Survival29.9 Months
Secondary

Progression-free Survival (PFS)

PFS is defined as the time from first dose of study treatment to the first documented progressive disease (PD) per RECIST 1.1 based on BICR, or death due to any cause, whichever occurs first. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD.

Time frame: Up to approximately 66 months

Population: All allocated participants who received at least one dose of study treatment

ArmMeasureValue (MEDIAN)
Cohort A: Clear Cell RCC (ccRCC)Progression-free Survival (PFS)7.1 Months
Cohort B: Non-clear Cell RCC (nccRCC)Progression-free Survival (PFS)4.2 Months

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