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 (ccRCC), and characterize safety and key time-to-event outcomes.

Patients: Adults (≥18) with histologically confirmed advanced or metastatic ccRCC, treatment naïve for systemic therapy, measurable disease by RECIST 1.1, ECOG 0–2, and adequate organ function. All IMDC risk groups are eligible with stratification by risk; initial analyses focus on intermediate/poor risk. Controlled HIV and resolved/controlled HBV/HCV are allowed per protocol. Key exclusions include prior checkpoint inhibitor or VEGF/VEGFR therapy, uncontrolled CNS metastases, recent radiotherapy or major surgery, active autoimmune disease requiring systemic therapy, significant cardiovascular disease, and pregnancy or breastfeeding.

Design: Randomized, open-label, multicenter phase II study using a Simon two-stage design; 2:1 allocation to investigational versus control arms. Treatment continues until toxicity, progression, or a maximum of 96 weeks (12-week induction, 84-week maintenance).

Treatments: Arm A (experimental): 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 on Days 1 and 22 only. Maintenance: Cycles 3–4 botensilimab 75 mg IV Day 1 with balstilimab 450 mg IV on Days 1, 22, 43, 64; Cycles 5–9 balstilimab 450 mg IV on Days 1, 22, 43, 64. Botensilimab is an investigational Fc‑enhanced anti‑CTLA‑4 antibody designed to augment T‑cell priming, deplete intratumoral Tregs, and activate myeloid cells while reducing complement-mediated toxicity; early trials across multiple solid tumors, particularly in combination with balstilimab, have shown encouraging activity including objective responses in MSS colorectal cancer and manageable immune‑related toxicity profiles. Balstilimab is an investigational anti‑PD‑1 antibody that blocks PD‑1/PD‑L1 and PD‑L2 interactions to restore T‑cell effector function; it has demonstrated clinical activity and tolerability alone and in combination with CTLA‑4 blockade in early studies. Arm B (active comparator): standard 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.

Outcomes: Primary: Objective response rate per RECIST 1.1 comparing botensilimab plus balstilimab versus ipilimumab plus nivolumab. Secondary: Duration of response; 12‑ and 24‑month landmark progression‑free survival; treatment‑free survival including time on/off treatment with grade ≥3 treatment‑related toxicities; safety and tolerability by CTCAE v5.0.

Burden on patient: Moderate. Patients require frequent IV infusions, especially during induction and early maintenance, with visits approximately every 2–3 weeks initially and every 4 weeks during nivolumab maintenance in the control arm or up to weekly‑to‑monthly patterns in the investigational arm’s maintenance cycles. Archival metastatic tumor tissue (10–20 unstained slides or FFPE block) is mandatory and must be shipped by end of Cycle 2; fresh biopsy is not mandated unless archival tissue is insufficient, which could increase burden. Routine safety labs and imaging per RECIST are expected at standard intervals for immunotherapy trials; no intensive pharmacokinetic sampling is described. Travel and time commitments are higher than standard single‑agent therapy but comparable to typical dual‑checkpoint regimens; immune‑related adverse event monitoring may necessitate additional unscheduled visits or interventions.

Last updated: Oct 2025

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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

Columbia University Irving Medical Center

New York, New York, 10032, United States

[email protected] / No phone

Status: Recruiting

Cornell University

Ithaca, New York, 14850, United States

[email protected] / 646-962-9406

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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