Phase 2 Advanced Renal Cell Cancer Combination ImmunoThErapy Clinical Trial

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Investigational drug late phase More information Active drug More information Moderate burden on patient More information

Trial Details

Sponsor: Michael B. Atkins, MD (other)

Phase: 2

Start date: Sept. 25, 2023

Planned enrollment: 120

Trial ID: NCT05928806
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More trial details at ClinicalTrials.gov More info

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Investigational Drug AI Analysis

chevron Show for: Balstilimab (AGEN2034, BAL)

chevron Show for: Botensilimab (AGEN1181, BOT)

HealthScout AI Analysis

Goal: Evaluate whether the investigational combination of botensilimab (Fc‑enhanced anti‑CTLA‑4) plus balstilimab (anti‑PD‑1) improves objective response rate versus the standard ipilimumab plus nivolumab regimen in previously untreated metastatic clear cell renal cell carcinoma, while characterizing durability of benefit and safety.

Patients: Adults (≥18 years) with histologically confirmed clear cell RCC that is unresectable or metastatic, treatment naïve in the systemic/adjuvant setting, ECOG PS 0–2, measurable disease by RECIST 1.1, and adequate organ function. All IMDC risk groups are eligible with stratification by risk; initial efficacy analyses focus on intermediate/poor risk. Controlled HIV, resolved HBV/HCV viremia, and treated brain metastases under specified conditions are permitted. Key exclusions include prior ICI or VEGF/VEGFR therapies, uncontrolled autoimmune disease or need for significant immunosuppression, recent major surgery, active serious infection, and unstable cardiovascular disease.

Design: Randomized, open-label, multicenter phase 2 trial using a Simon two-stage design; 120 patients randomized 2:1 to experimental versus control. Treatment continues until toxicity, progression, or a maximum of 96 weeks (12-week induction, 84-week maintenance).

Treatments: Arm A: Botensilimab plus balstilimab. Induction: Cycle 1 botensilimab 75 mg IV with balstilimab 450 mg IV on Days 1 and 22; Cycle 2 balstilimab 450 mg IV alone on Days 1 and 22. Maintenance: Cycles 3–4 botensilimab 75 mg IV Day 1 plus balstilimab 450 mg IV on Days 1, 22, 43, 64; Cycles 5–9 balstilimab 450 mg IV alone on Days 1, 22, 43, 64. Botensilimab is an Fc‑enhanced anti‑CTLA‑4 antibody designed to augment T‑cell priming and Treg depletion, activate myeloid cells, and induce immune memory; Fc engineering increases engagement of FcγRIIIa with reduced C1q binding to potentially mitigate complement‑mediated toxicity. In early trials, botensilimab with balstilimab has shown activity across multiple solid tumors, including a 23% ORR and prolonged survival in MSS colorectal cancer subsets, with a manageable immune‑related toxicity profile dominated by diarrhea/colitis and fatigue. Balstilimab is a human IgG4 PD‑1 inhibitor that restores T‑cell effector function; it has demonstrated antitumor activity as monotherapy and enhanced responses in combination with CTLA‑4 blockade in cervical cancer studies. Arm B: Ipilimumab 1 mg/kg IV plus nivolumab 3 mg/kg IV on Days 1 and 22 for two 6‑week induction cycles, followed by nivolumab 480 mg IV every 4 weeks during seven 12‑week maintenance cycles; this is an established first‑line regimen in metastatic ccRCC.

Outcomes: Primary: Objective response rate by RECIST 1.1 comparing experimental versus control arms. Secondary: Duration of response, 12- and 24-month landmark progression-free survival, treatment-free survival (including time on/off therapy and time with grade ≥3 treatment-related toxicities), and safety per CTCAE v5.0.

Burden on patient: Moderate. Patients must provide archival metastatic tumor tissue (10–20 unstained slides or FFPE block) by end of Cycle 2, which may require coordination and shipping but not necessarily a new biopsy unless archival tissue is insufficient. Visit frequency is higher than standard due to induction dosing on Days 1 and 22 and maintenance dosing every 2–4 weeks depending on cycle, necessitating regular travel for infusions over up to 96 weeks. Routine safety labs, imaging for RECIST assessments at typical intervals, and management of potential immune-related adverse events add clinical monitoring demands similar to other ICI trials. No intensive pharmacokinetic sampling or mandated on‑study biopsies are specified, mitigating additional procedural burden.

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Sites (13)

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University of California San Diego

La Jolla, California, 92093, United States

[email protected] / No phone

Status: Recruiting

Yale University, Yale Cancer Center

New Haven, Connecticut, 06520, United States

[email protected] / No phone

Status: Recruiting

Georgetown University

Washington D.C., District of Columbia, 20057, United States

[email protected] / 202-687-1116

Status: Recruiting

Winship Cancer Institute of Emory University

Atlanta, Georgia, 30322, United States

[email protected] / No phone

Status: Recruiting

Indiana University Melvin and Bren Simon Comprehensive Cancer Center

Indianapolis, Indiana, 46202, United States

[email protected] / No phone

Status: Recruiting

Beth Israel Deaconess Medical Center

Boston, Massachusetts, 02215, United States

[email protected] / No phone

Status: Recruiting

Dana-Farber - Partners Cancer Care, Inc

Boston, Massachusetts, 02215, United States

[email protected] / No phone

Status: Recruiting

John Theurer Cancer Center

Hackensack, New Jersey, 07601, United States

[email protected] / 551-996-1777

Status: Recruiting

Cornell University

Ithaca, New York, 14850, United States

[email protected] / 646-962-9406

Status: Recruiting

Columbia University Irving Medical Center

New York, New York, 10032, United States

[email protected] / No phone

Status: Recruiting

Ohio State University Comprehensive Cancer Center

Columbus, Ohio, 43210, United States

[email protected] / No phone

Status: Recruiting

Penn Medicine Abramson Cancer Center

Philadelphia, Pennsylvania, 19104, United States

[email protected] / No phone

Status: Recruiting

University of Texas Southwestern Medical Center

Dallas, Texas, 75390, United States

[email protected] / No phone

Status: Recruiting

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