Virus therapy takes on tough cancers in early trial

NCT ID NCT07190833

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

Summary

This early-phase study is testing a modified virus called OTS-412, given alone or with hydroxyurea and the immunotherapy atezolizumab, in 27 adults with solid tumors that have stopped responding to standard treatments. The main goal is to check safety and side effects, while also looking at whether the tumors shrink. It is too soon to know if this approach will work, but it may offer a new avenue for patients with few options left.

What this could mean

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

Active substance
OTS-412 (a modified vaccinia virus), hydroxyurea, and atezolizumab
What this could lead to
If it works, this could point toward a new treatment option for patients with solid tumors that no longer respond to standard therapies.
What could go wrong
This is a very early phase 1 trial with only 27 participants, so it is primarily testing safety. The virus and drug combination may not shrink tumors or improve survival, and side effects are unknown.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

Contacts and locations

Locations

  • Dong-A University Hospital

    RECRUITING

    Busan, 49201, South Korea

  • Pusan National University Yangsan Hospital

    RECRUITING

    Busan, 50612, South Korea

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