BioNTech's RNA cancer therapy trial halted early

NCT ID NCT05262530

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested an experimental RNA-based therapy called BNT142 in people with advanced solid tumors that have a specific protein called CLDN6. The goal was to see if it was safe and could shrink tumors. However, the trial was terminated early, so we don't have clear answers about whether it works.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

BNT142 (an experimental RNA-based therapy)

What this could lead to

If it had worked, this could have pointed toward a new treatment option for certain advanced solid tumors that express the CLDN6 protein.

What could go wrong

The trial was terminated early, so we don't know if BNT142 is safe or effective. It was a very early study (Phase 1/2a) with only 73 participants, so even positive results would need much more testing.

Disclaimer Read more

This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Conditions

The condition(s) this trial relates to.

endometrial cancer endometrial carcinoma neoplasm non-small cell lung carcinoma ovarian cancer testicular cancer

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Cambridge University Hospitals NHS Foundation Trust

    Cambridge, CB2 0QQ, United Kingdom

  • Churchill Hospital - Oxford University Hospitals NHS Foundation Trust

    Oxford, OX3 7LE, United Kingdom

  • Duke University Medical Center

    Durham, North Carolina, 27705, United States

  • HM Nou Delfos General Hospital

    Barcelona, 08023, Spain

  • Hammersmith Hospital, Imperial College School Of Medicine - Imperial College Healthcare NHS Trust

    London, W12 0HS, United Kingdom

  • Hospital Universitario 12 de Octubre - Centro de Actividades Ambulatorias

    Madrid, 28041, Spain

  • Hospital Universitario Vall D'Hebron

    Barcelona, 08035, Spain

  • Hospital Universitario Virgen de la Victoria Campus Universitario de Teatinos

    Málaga, 29010, Spain

  • MD Anderson Cancer Center

    Madrid, 28033, Spain

  • NEXT Virginia

    Fairfax, Virginia, 22031, United States

  • National University Cancer Institute - National University Hospital

    Singapore, 119074, Singapore

  • START Madrid CIOCC Hospital Universitario HM Sanchinarro

    Madrid, 28050, Spain

  • START Madrid-FJD Hospital Universitario Fundacion Jimenez Diaz

    Madrid, 28040, Spain

  • South Texas Accelerated Research Therapeutics (START) - San Antonio

    San Antonio, Texas, 78229, United States

  • The Clatterbridge Cancer Centre NHS Foundation Trust

    Liverpool, L7 8YA, United Kingdom

  • The University of Texas MD Anderson Cancer Center

    Houston, Texas, 77030, United States

  • University of Maryland Medical Center

    Baltimore, Maryland, 21201, United States

  • University of Pennsylvania

    Philadelphia, Pennsylvania, 19104, United States