A Study of Belzutifan (MK-6482) in Combination With Palbociclib Versus Belzutifan Monotherapy in Participants With Advanced Renal Cell Carcinoma (MK-6482-024/LITESPARK-024)
Belzutifan: 40 mg tablet administered orally at a dose of 120 mg.
Palbociclib: 75, 100, or 125 mg tablet administered orally according to randomized dose for 21 days consecutive days followed by 7 days off.
Study summary
The purpose of this study is to evaluate the efficacy and safety of belzutifan monotherapy and belzutifan plus palbociclib combination therapy in participants with advanced clear-cell renal cell carcinoma (ccRCC) who experienced disease progression on or after receiving prior therapy. The study will establish the safety of belzutifan plus palbociclib and determine a recommended dosage of palbociclib for the combination therapy by ascending dose escalation.
Eligibility
Sex
ALL
Min age
18 Years
Max age
—
Healthy volunteers
No
Inclusion Criteria:
* Has a histologically confirmed diagnosis of unresectable Stage IV (per American Joint Committee on Cancer \[AJCC\], 8th Edition) RCC with clear-cell component
* Has had disease progression on or after having received at least 2 systemic treatments for unresectable Stage IV RCC with prior anti-programmed cell death 1 ligand 1 (PD-1/L1) and a vascular endothelial growth factor-tyrosine kinase inhibitor (VEGF-TKI) in sequence or in combination
* Has measurable disease per RECIST 1.1 as assessed by the investigator and verified by blinded independent central review (BICR)
* Has recovered from all AEs due to previous therapies
Exclusion Criteria:
* Has hypoxia, requires intermittent supplemental oxygen, or requires chronic supplemental oxygen
* Has a known additional malignancy that is progressing or has required active treatment within the past 3 years
* Has known central nervous system (CNS) metastases and/or carcinomatous meningitis
* Has clinically significant cardiac disease
* Has moderate to severe hepatic impairment
* Has a known history of human immunodeficiency virus (HIV) infection
* Has a history of hepatitis B (HBV) or known active hepatitis C (HCV) infection
* Has received prior treatment of belzutifan or palbociclib
* Has received prior radiotherapy ≤2 weeks prior to first dose of study intervention. Participants must have recovered from all radiation-related toxicities and not require corticosteroids
* Has had major surgery ≤3 weeks prior to first dose of study intervention
* Has received colony-stimulating factors (eg, granulocyte colony-stimulating factor \[G-CSF\], granulocyte-macrophage colony-stimulating factor \[GM-CSF\], or recombinant erythropoietin \[EPO\]) ≤28 days prior to the first dose of study intervention
Primary outcome measure(s)
Number of Participants Who Experience at Least One Dose-limiting Toxicity (DLT) — Up to approximately 28 days A DLT consists of one or more of the following toxicities: Grade (Gr) 3 or 4 hypoxia or dyspnea; Gr 3 or 4 nausea, vomiting, or diarrhea if persistent for \>48 hours despite therapy; Gr 3 or 4 cardiovascular, vascular, or thrombotic events; Nonhematologic AE ≥Gr 3 in severity with exceptions; Gr 3 rash that does not resolve within 2 weeks; Gr 3 nonhematologic toxicity if persisting despite optimal medical treatment; Gr 3 or 4 hematologic toxicities; Gr 3 or 4 febrile neutropenia; Gr 3 or 4 nonhematologic laboratory value; Any aspartate aminotransferase or alanine aminotransferase \>8x the upper limit of normal (ULN) or 5 to 8x ULN persisting for \>2 weeks; \>2 weeks delay in dosing due to intervention-related toxicity; Intervention-related toxicity causing intervention discontinuation in the first 28 days of dosing; Missing \>20% of intervention doses due to drug-related AEs; Gr 5 toxicity. The number of participants who experience at least one DLT will be reported.
Number of Participants Who Experience at Least One Adverse Event (AE) — Up to approximately 4 years An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who experience at least one AE will be reported.
Number of Participants Who Discontinue Study Treatment Due to an AE — Up to approximately 4 years An AE is any unfavorable and unintended sign, 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. The number of participants who discontinued from the study treatment due to an AE will be reported.
Trial sites (13)
Facility
City
Region
Status
Georgetown University Medical Center ( Site 1002)
Washington D.C.
District of Columbia
University of Chicago Medical Center ( Site 1007)
Chicago
Illinois
Beth Israel Deaconess Medical Center-Cancer Clinical Trials Office ( Site 1001)
Boston
Massachusetts
Huntsman Cancer Institute-HCI Clinical Trials Office ( Site 1004)
Salt Lake City
Utah
Macquarie University-MQ Health Clinical Trials Unit ( Site 2001)
Macquarie University
New South Wales
Westmead Hospital ( Site 2006)
Westmead
New South Wales
Frankston Hospital-Oncology and Haematology ( Site 2005)
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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