Diabetes drug metformin takes on deadly brain cancer in new trial

NCT ID NCT04945148

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This phase 2 trial is testing whether adding the diabetes drug metformin to standard radiation and chemotherapy can help people with a specific type of glioblastoma, a fast-growing brain cancer. The study will include about 64 patients whose tumors have a particular energy-making profile (OXPHOS-positive). Participants will take metformin daily alongside standard treatment, and researchers will track how long the cancer stays under control and overall survival.

What this could mean

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

Active substance

Metformin

What this could lead to

If it works, this could offer a new, well-tolerated treatment option for a specific subtype of glioblastoma, potentially slowing tumor growth.

What could go wrong

This is a small, early-phase trial (phase 2) with only 64 participants. The benefit may be modest or not confirmed in larger studies, and metformin may cause gastrointestinal side effects.

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.

glioblastoma IDH-wildtype glioblastoma

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

  • Foch Hospital

    RECRUITING

    Suresnes, Hauts de Seine, 92150, France

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

  • Hôpital Neurologique Pierre Wertheimer

    RECRUITING

    Bron, Lyon, 69500, France

    Contact Email: •••••@•••••

  • Istituto Nazionale Carlo Besta

    NOT_YET_RECRUITING

    Milan, Milano, 20131, Italy

    Contact Email: •••••@•••••

  • Pitié Salpêtrière Hospital

    RECRUITING

    Paris, PARIS, 75013, France

    Contact Email: •••••@•••••

  • Saint Louis Hospital

    RECRUITING

    Paris, Paris, 75010, France

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

  • Spidali Riuniti Di Livorno

    NOT_YET_RECRUITING

    Livorno, Toscana Nord Ouest, 57100, Italy

    Contact Email: •••••@•••••

  • Timone Hospital

    RECRUITING

    Marseille, Marseille, 13354, France

    Contact Email: •••••@•••••