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Active, not recruitingNCT03634540Updated Dec 20, 2024

A Trial of Belzutifan (PT2977, MK-6482) in Combination With Cabozantinib in Patients With Clear Cell Renal Cell Carcinoma (ccRCC) (MK-6482-003)

A Phase 2 interventional study of Belzutifan and Cabozantinib in Renal Cell Carcinoma (RCC), Clear Cell Renal Cell Carcinoma (ccRCC) and Kidney Cancer, sponsored by Peloton Therapeutics, Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA). Active, not recruiting at 10 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-12-20.

Sponsored by Peloton Therapeutics, Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA) (part of Merck & Co., Inc) · Phase 2, Interventional, and Treatment

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Phase
Phase 2
Study type
Interventional
Enrollment
118
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-15

Among 18 studies testing belzutifan in Carcinoma, Renal Cell — 5 open to participants now, 13 under way, 5 of them phase 3. belzutifan · Carcinoma, Renal Cell.

Planned enrollment
11th of 18
118 · median 135
Started
2018
the only one that year
Phase 2
7 of 18
5 open now
Primary completion
2027-02
later than 7 of 12 live
Registered
2nd of 18
by date
Lead sponsor
2 of 18
Peloton Therapeutics, Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)

Among the 18 studies testing belzutifan in Carcinoma, Renal Cell, this one is the 11th largest by planned enrollment, is the only one that started in 2018, is one of 7 in phase 2, reaches primary completion later than 7 of the 12 other live ones, and was the 2nd registered.

Carcinoma, Renal Cell

2,038 studies on the registry are indexed under Carcinoma, Renal Cell; 395 are open to participants now.

Browse Carcinoma, Renal Cell studies →

Open to participants now

5 of the 18 studies testing belzutifan in Carcinoma, Renal Cell are open now, in 4 countries. Recruiting first, the newest first:

By country, each count listing its studies:

All 5 open studies →

About belzutifan

belzutifan: first FDA approval 2021 (WELIREG), first EMA approval 2025. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 307 Carcinoma, Renal Cell studies recruiting now, 254 (83%) set no upper age limit and 18 (6%) stop at 75 or younger; 20 take children under 18; 19 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 18 studies testing belzutifan in Carcinoma, Renal Cell, or all of them as a file.
02

Study summary

This is an open-label Phase 2 study which will evaluate the efficacy and safety of belzutifan in combination with cabozantinib in participants with advanced ccRCC. Belzutifan and cabozantinib will be administered orally once daily.

03

Conditions studied

  • Renal Cell Carcinoma (RCC)
  • Clear Cell Renal Cell Carcinoma (ccRCC)
  • Kidney Cancer
  • Renal Cancer
  • Renal Cell Carcinoma
  • Renal Cell Cancer Metastatic
  • Renal Cell Carcinoma Recurrent
  • Renal Cell Cancer, Recurrent
  • Kidney

Keywords

  • hypoxia-inducible factor (HIF)
  • hypoxia-inducible factor 2 alpha (HIF-2α, HIF-2 alpha)
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Has locally advanced or RCC with predominantly clear cell subtype
  • Has at least one as defined by version 1.1
  • (ECOG) performance status of 0-1
  • Has adequate organ function defined as follows:

    • ≥ 1,000/µL, level ≥ 10 g/dL and count ≥ 100,000/µL without transfusion or growth factor support within 2 weeks prior to obtaining the hematology values at screening;
    • Serum creatinine level ≤ 2.0 × (ULN)
    • Transaminase levels (/ALT) ≤ 3.0 × upper limit of normal (ULN); total (TBILI) ≤ 1.5 mg/dL in the absence of Gilbert's disease *Cohort 1: Participants must not have received prior systemic therapy for advanced or metastatic ccRCC
  • Cohort 2: Participants must have received prior immunotherapy and no more than two prior treatments for advanced or metastatic ccRCC

Exclusion criteria

Exclusion Criteria:

  • Has received prior treatment with belzutifan or other HIF2α inhibitors
  • Has received prior treatment with cabozantinib
  • Has had radiation therapy for bone within two weeks of starting study drug
  • Has a history of untreated or history of or spinal cord compression
  • Has failed to recover from the reversible effects of prior anticancer therapy
  • Has uncontrolled or poorly controlled hypertension
  • Is receiving anticoagulant therapy
  • Has had any major cardiovascular event within 6 months prior to study drug administration
  • Has any other cardiac, respiratory, or other medical or psychiatric condition that might interfere with participation in the trial or interfere with the interpretation of trial results
  • Has had major surgery within 3 months before first study drug administration
  • Has an active infection requiring systemic treatment
  • Is participating in another therapeutic clinical trial
Terms in these criteria, in plain language(13)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
118 participants (estimated)

Study arms

  • Experimental
    Belzutifan + Cabozantinib: Treatment Naïve (Cohort 1)

    Naïve participants will receive 120 mg belzutifan and 60 mg cabozantinib orally once daily (QD) at the same time.

    Drug: Belzutifan · Drug: Cabozantinib

  • Experimental
    Belzutifan + Cabozantinib: Prior Immunotherapy (Cohort 2)

    Participants who have received prior immunotherapy will receive 120 mg belzutifan and 60 mg cabozantinib orally QD at the same time.

    Drug: Belzutifan · Drug: Cabozantinib

Interventions

  • Belzutifan tablets administered orally.

    Also known as: PT2977, MK-6482, WELIREG™

  • Cabozantinib tablets administered orally.

    Also known as: CABOMETYX®

06

What researchers measure

Primary outcomes

  1. Overall Response Rate (ORR)

    ORR is defined as the percentage of participants with a best confirmed response of Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: ≥30% decrease in the sum of diameters of target lesions) as determined by the investigator using Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1).

    Time frame: Up to approximately 2 years

Secondary outcomes

  1. Progression Free Survival (PFS)

    PFS is defined as the interval from the start of study treatment until the earlier of the first documentation of disease progression determined by RECIST 1.1 or death from any cause.

    Time frame: Up to approximately 2 years

  2. Duration of Response (DOR)

    DOR is defined as the interval from the first documentation of response, as determined by RECIST 1.1, to the earlier of the first documentation of disease progression or death from any cause, and calculated for participants with a best confirmed response of CR (disappearance of all target lesions) or PR (≥30% decrease in the sum of diameters of target lesions).

    Time frame: Up to approximately 2 years

  3. Time to Response (TTR)

    TTR is defined as the interval from the start of study treatment to the first documentation of a response, as determined by RECIST 1.1, and calculated for participants with a best confirmed response of CR or PR.

    Time frame: Up to approximately 2 years

  4. Overall Survival (OS)

    OS is defined as the interval from the start of treatment to the death of the participant from any cause.

    Time frame: Up to approximately 2 years

  5. Number of participants experiencing an Adverse Event (AE)

    An AE is defined as any untoward medical occurrence in a participant regardless of its causal relationship to study treatment. An AE can be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of the study drug, whether or not it is considered to be study drug related. Included in this definition are any newly occurring events and any previous condition that has increased in severity or frequency since the administration of study drug.

    Time frame: Up to approximately 2 years

  6. Number of participants discontinuing study treatment due to an Adverse Event (AE)

    An AE is defined as any untoward medical occurrence in a participant regardless of its causal relationship to study treatment. An AE can be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of the study drug, whether or not it is considered to be study drug related. Included in this definition are any newly occurring events and any previous condition that has increased in severity or frequency since the administration of study drug.

    Time frame: Up to approximately 2 years

  7. Belzutifan Plasma Concentration

    Blood samples for the determination of belzutifan concentration will be collected at pre-specified timepoints before and after treatment administration.

    Time frame: Weeks 1 and 4: pre-dose, 2 and 6 hours post-dose

  8. Belzutifan Metabolite Plasma Concentration

    Blood samples for the determination of belzutifan metabolite concentration will be collected at pre-specified timepoints before and after treatment administration.

    Time frame: Weeks 1 and 4: pre-dose, 2 and 6 hours post-dose

  9. Cabozantinib Plasma Concentration

    Blood samples for the determination of cabozantinib concentration will be collected at pre-specified timepoints before and after treatment administration.

    Time frame: Weeks 1 and 4: pre-dose, 2 and 6 hours post-dose

07

Study locations

10 sites
08

References and documents

Publications

  • Choueiri TK, McDermott DF, Merchan J, Bauer TM, Figlin R, Heath EI, Michaelson MD, Arrowsmith E, D'Souza A, Zhao S, Roy A, Perini R, Vickery D, Tykodi SS. Belzutifan plus cabozantinib for patients with advanced clear cell renal cell carcinoma previously treated with immunotherapy: an open-label, single-arm, phase 2 study. Lancet Oncol. 2023 May;24(5):553-562. doi: 10.1016/S1470-2045(23)00097-9. Epub 2023 Mar 31. PubMed 37011650 ↗

Individual participant data

Plan to share: Yes — http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf

Data sharing details ↗ · engagezone.msd.com

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Sep 2018 (actual). Primary completion is estimated for Feb 2027, 100 months after the start.

Of 47 industry-sponsored phase 2 interventional studies under Carcinoma, Renal Cell, half reached primary completion within 33 months of starting (the median), counting those still running; a quarter within 24 and three quarters within 52. This study's planned 100 months is above that.

Counting every sponsor, half of 230 studies reached it within 58 months; a quarter within 33 and three quarters within 94.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 3, 2018
First posted
Aug 16, 2018
StartActual
Sep 27, 2018
Primary completionEst.
Feb 26, 2027
CompletionEst.
Feb 26, 2027
Last update
Dec 20, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 20, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03634540
Responsible party
Sponsor
First posted
Aug 16, 2018
Start date
Sep 27, 2018
Primary completion
Feb 26, 2027 (estimated)
Completion
Feb 26, 2027 (estimated)
Last update
Dec 20, 2024

Study contacts

Medical Director
study director · Merck Sharp & Dohme LLC

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Dec 2024. You cannot join it, but the record below documents what was studied.

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Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

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Studies of the drug tested here: Belzutifan

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