Why does immunotherapy fail in some bowel cancer patients? new study aims to find out

NCT ID NCT06353854

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

Summary

This study will follow 600 people with a specific type of advanced colorectal cancer (MSI-high) who are being treated with the immunotherapy drug pembrolizumab. The goal is to understand why about 20-30% of patients do not respond to this treatment. By analyzing tumor samples and patient data, researchers hope to identify markers that predict resistance, helping to personalize treatment decisions in the future.

What this could mean

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

Active substance

pembrolizumab

What this could lead to

If successful, this could help doctors identify which patients are unlikely to benefit from pembrolizumab, allowing them to choose alternative treatments earlier.

What could go wrong

This is an observational study, not a treatment trial. It will not directly improve outcomes for participants, and the findings may not lead to immediate changes in care.

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.

colorectal cancer Lynch syndrome

As listed by the trial registrant

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

Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • CH - Compiegne

    NOT_YET_RECRUITING

    Compiègne, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

  • CH - Gustave Dron

    NOT_YET_RECRUITING

    Tourcoing, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

  • CH - Louis Pasteur

    NOT_YET_RECRUITING

    Le Coudray, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

  • CH Jean Minjoz

    NOT_YET_RECRUITING

    Besançon, 25030, France

    Contact Email: •••••@•••••

  • CH Saint Joseph

    NOT_YET_RECRUITING

    Marseille, France

    Contact Email: •••••@•••••

    Contact

    Contact

  • CH Saint Joseph - Saint Luc

    NOT_YET_RECRUITING

    Lyon, 69365, France

    Contact Email: •••••@•••••

  • CHR D'Orleans - Hopital de la Source

    NOT_YET_RECRUITING

    Orléans, 45100, France

    Contact Phone: •••-•••-••••

  • Caluire et Cuire - Infirmerie Protestante de Lyon

    NOT_YET_RECRUITING

    Lyon, France

    Contact

    Contact Email: •••••@•••••

    Contact

  • Centre Hospitalier

    NOT_YET_RECRUITING

    Mulhouse, 68070, France

    Contact Phone: •••-•••-••••

  • Centre Hospitalier Regional et Universitaire de Lille

    RECRUITING

    Lille, 59037, France

    Contact Phone: •••-•••-••••

  • Ch - Centre Hospitalier Metropole Savoie

    NOT_YET_RECRUITING

    Chambéry, 73011, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

  • Ch - Centre Hospitalier de Cholet

    NOT_YET_RECRUITING

    Cholet, 49300, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

  • Ch - Centre Hospitalier de La Côte Basque

    NOT_YET_RECRUITING

    Bayonne, 64100, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

  • Ch - Centre Hospitalier de Soisson

    NOT_YET_RECRUITING

    Soissons, 02209, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

  • Ch - Ch Beauvais

    NOT_YET_RECRUITING

    Beauvais, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

  • Ch - Chd Vendée

    NOT_YET_RECRUITING

    La Roche-sur-Yon, 85925, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

  • Ch - Duchenne

    NOT_YET_RECRUITING

    Boulogne-sur-Mer, France

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

  • Ch - Hôpital Saint Joseph

    NOT_YET_RECRUITING

    Marseille, 13285, France

    Contact

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact

    Contact

    Contact

  • Polyclinique Saint Privat

    RECRUITING

    Boujan-sur-Libron, 34760, France

    Contact Email: •••••@•••••

  • Prive - Institut Montsouris

    RECRUITING

    Paris, France

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact Phone: •••-•••-•••• Email: •••••@•••••