🏛️ Verified NIH Record • Updated 2026-05-06

INBRX-106 in Combination With Pembrolizumab in First-line PD-L1 CPS≥20 HNSCC (NCT06295731)

A Phase 2/3, Randomized Study of INBRX-106 Combined With Pembrolizumab Versus Pembrolizumab as First Line Treatment for Patients With Recurrent or Metastatic (R/M) Head and Neck Squamous Cell Carcinoma (HNSCC) Expressing PD-L1 (CPS ≥20) (HexAgon-HN)

🔵 Active, Not Recruiting Phase2 / Phase3 💊 Investigational Drug / Biologic Sponsor: Inhibrx Biosciences, Inc

🩺 Plain-English Summary (8th-Grade Level)

This seamless phase 2/3 randomized controlled study will evaluate the efficacy and safety of the hexavalent OX40 agonist antibody INBRX-106 combined with the anti-PD-1 antibody pembrolizumab versus pembrolizumab (+ placebo in phase 3) as first-line treatment for patients with locally advanced recurrent or metastatic head and neck squamous cell carcinoma (R/M HSNSCC) incurable by local therapies, expressing PD-L1 with a combined proportion score (CPS) ≥20.

Who can join: Review the eligibility criteria below.

Location: City of Hope Medical Center — Duarte, California

Age range: 18 Years

🧪 Interventions in This Study

📋 "Do I Qualify?" — 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria ↗

📍 All Participating Trial Locations (87 Sites)

Showing the first 25 of 87 sites.

  • City of Hope Medical Center — Duarte, California
  • Los Angeles Cancer Network (LACN) — Los Angeles, California
  • UC Davis — Sacramento, California
  • Medical Oncology Associates of San Diego — San Diego, California
  • Sarcoma Oncology Center — Santa Monica, California
  • ChristianaCare Health Services — Newark, Delaware
  • University of Florida UF Health Cancer Center — Gainesville, Florida
  • The Oncology Institute of Hope & Innovation — Miami, Florida
  • Mid Florida Hematology and Oncology Center — Orange City, Florida
  • Cleveland Clinic Florida, The Maroone Cancer Center — Weston, Florida
  • University of Illinois Cancer Center — Chicago, Illinois
  • Norton Cancer Institute — Louisville, Kentucky
  • Massachusetts General Hospital — Boston, Massachusetts
  • Karmanos Cancer Institute — Detroit, Michigan
  • Washington University St. Louis — St Louis, Missouri
  • Intermountain Health, St. Vincent Regional Hospital, Cancer Centers of Montana — Billings, Montana
  • Oncology Hematology West, PC dba Nebraska Cancer Specialists — Omaha, Nebraska
  • Comprehensive Cancer Centers of Nevada — Las Vegas, Nevada
  • Christus St. Vincent Regional Cancer Center — Santa Fe, New Mexico
  • UNC Lineberger Comprehensive Cancer Center — Chapel Hill, North Carolina
  • Oklahoma University Stephenson Cancer Center — Oklahoma City, Oklahoma
  • Oregon Health & Science University — Portland, Oregon
  • UPMC Hillman Cancer Center — Pittsburgh, Pennsylvania
  • CHRISTUS Spohn Cancer Center — Corpus Christi, Texas
  • VCU Massey Comprehensive Cancer Center — Richmond, Virginia

📞 Contact the Study Coordinator

Phone: (800) 826-4673

Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.

💰 Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA § 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

💡 How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Contact the study coordinator using the phone/email above.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
🏛️ View Official NIH Record ↗