A Randomized Phase 2 Trial of Fianlimab and Cemiplimab +/- Ipilimumab or Ipilimumab Plus Nivolumab in First-line Advanced Renal Cell Carcinoma (RCC)

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Trial Details

Sponsor: Brian Rini (other)

Phase: 2

Start date: Sept. 23, 2025

Planned enrollment: 120

Trial ID: NCT07188896
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More trial details at ClinicalTrials.gov More info

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chevron Show for: fianlimab (REGN3767)

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Goal: Evaluate whether adding investigational LAG-3 blockade with fianlimab to PD-1 blockade, with or without ipilimumab, improves first-line outcomes in advanced clear-cell renal cell carcinoma compared with standard ipilimumab plus nivolumab.

Patients: Adults with previously untreated, unresectable locally advanced or metastatic renal cell carcinoma containing a clear-cell component, across all IMDC risk groups. Patients need measurable disease, Karnofsky performance status of at least 70%, adequate organ function, and available tumor tissue. Key exclusions include prior systemic RCC therapy, active autoimmune disease requiring systemic immunosuppression, a history of myocarditis, and ongoing prednisone-equivalent dosing of at least 10 mg/day.

Design: Three-arm, randomized phase 2 trial with 2:2:1 allocation to the triplet, doublet, or active-control arm, respectively.

Treatments: Arm A receives intravenous fianlimab, cemiplimab, and ipilimumab; Arm B receives intravenous fianlimab and cemiplimab. Fianlimab is an investigational anti-LAG-3 antibody that blocks an inhibitory T-cell checkpoint and is being paired with the anti-PD-1 antibody cemiplimab. In a single-arm phase 1 melanoma study, the combination produced a 61.2% objective response rate among patients without prior anti-PD-1 treatment for advanced disease; however, a subsequent randomized phase 3 melanoma trial did not show a statistically significant progression-free survival benefit over pembrolizumab, and efficacy in RCC remains unknown. Arm C receives intravenous ipilimumab plus nivolumab, a standard CTLA-4/PD-1 checkpoint-inhibitor regimen.

Outcomes: The primary endpoint is confirmed objective response rate by RECIST 1.1 over 2 years. Secondary endpoints include median, 12-month, and 24-month progression-free survival; duration of response; treatment-free survival, including time with grade 3 or higher treatment-related toxicity; and treatment-related adverse events and serious adverse events.

Burden on patient: Moderate. All arms require repeated visits for intravenous therapy, laboratory monitoring, and imaging to assess response and toxicity. Available tumor tissue is required, preferably from a recent metastatic lesion, which may necessitate a biopsy if suitable tissue is unavailable; no routine serial research biopsies or intensive pharmacokinetic sampling are specified. Travel and monitoring demands may be greater than with oral therapy, but much of the assessment resembles usual care for intravenous immunotherapy.

Last updated: Sep 2026

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Vanderbilt-Ingram Cancer Center

Nashville, Tennessee, 37232, United States

[email protected] / 615-343-6584

Status: Recruiting

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