🏛️ Verified NIH Record • Updated 2026-01-06

ACTengine® IMA203 Combined With mRNA-4203 (NCT06946225)

A First-in-human, Open-label Trial to Evaluate the Combination of ACTengine® IMA203 With mRNA-4203 in Previously Treated, Unresectable or Metastatic Cutaneous Melanoma or Synovial Sarcoma Patients (ACTengine® IMA203-102)

🟢 Recruiting Phase1 💊 Investigational Drug / Biologic Sponsor: Immatics US, Inc.

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

This purpose of this clinical trial is to evaluate the safety, tolerability and anti-tumor activity of IMA203 in combination with different doses of mRNA-4203. The trial includes participants with previously treated unresectable or metastatic cutaneous melanoma (CM) or synovial sarcoma (SS).

Who can join: Review the eligibility criteria below.

Location: University of California San Francisco — San Francisco, 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 (4 Sites)

  • University of California San Francisco — San Francisco, California
  • Dana Farber Cancer Institute — Boston, Massachusetts
  • Memorial Sloan Kettering Cancer Center — New York, New York
  • MD Anderson Cancer Center — Houston, Texas

📞 Contact the Study Coordinator

Phone: (346) 204-5400

Email: ctgovinquiries@immatics.com

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 ↗