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New pill shows promise in early trial for tough cancers

NCT ID NCT06566079

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 17, 2026 · Updated 2 times

Summary

This early-stage trial is testing a new oral drug called ISM6331 in 100 adults with advanced mesothelioma or other solid tumors that have not responded to standard treatments. The study aims to find a safe dose and check for any early signs that the drug can shrink tumors. Participants take one capsule daily, and researchers will monitor side effects and how the drug moves through the body.

What this could mean

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

Active substance
ISM6331 (a drug taken orally as a capsule once daily)
What this could lead to
If successful, this could point toward a new treatment option for people with advanced mesothelioma or other solid tumors who have run out of standard therapies.
What could go wrong
This is a very early Phase 1 trial with only 100 participants, so the drug may not prove safe or effective. Side effects are unknown, and it may not work for all tumor types.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 160 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2024

Expected to finish

Feb 2028

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Male or female participants with age ≥18 years at the time of signing the informed consent. 2. Histologically confirmed unresectable advanced or metastatic mesothelioma or other advanced solid tumors, who have failed standard therapy or for whom no effective standard therapy exists, participants for part 1 is regardless of the presence or absence of the genetic alterations of the Hippo pathway, but for part 2 participants with solid tumors other than mesothelioma, genetic testing documentation must demonstrate Hippo signaling pathway dysregulation. 3. Participants with malignant mesothelioma must have prior exposure to at least immune checkpoint therapy and platinum-based chemotherapy. 4. Presence of at least one evaluable lesion in Part 1 or one measurable target lesion in Part 2 according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) for participants with non-pleural mesothelioma or other solid tumors and modified RECIST (mRECIST) v1.1 for participants with malignant pleural mesothelioma. 5. Eastern Cooperative Oncology Group (ECOG) performance status (PS) ≤1. 6. Life expectancy of ≥12 weeks as judged by the investigator. 7. Adequate organ function as determined by medical assessment (within 7 days prior to the first dose of study treatment). 8. Capable of providing signed informed consent form (ICF) and complying with the requirements and restrictions listed in the ICF and in this study protocol. Exclusion Criteria: 1. Participants who have previously received a TEAD inhibitor. 2. Participation in other therapeutic clinical studies within 28 days or 5 half-lives (whichever is shorter) prior to first dose of study treatment. 3. Anti-tumor therapy within 28 days or 5 half-lives (whichever is shorter) prior to first dose of study treatment. 4. Known active central nervous system (CNS) primary tumor or untreated CNS metastases. 5. As judged by the investigator, any evidence of severe or uncontrolled systemic diseases. 6. Unwillingness or unable to comply with the requirements of oral drug administration, or presence of a gastro-intestinal condition 7. Have prior or ongoing clinically significant illness, medical condition, surgical history, physical finding, laboratory abnormality or any other conditions that, in the investigator's opinion, would not be in the best interest of the participant; or that could alter the absorption, distribution, metabolism, or excretion of the study treatment; or impair the assessment of study result. 8. Currently receiving any of Strong inhibitors or inducers of P-gp, or Sensitive substrates of P-gp, CYP1A2, CYP2B6, and CYP3A4 that cannot be discontinued 14 days or 5 half-lives for inhibitors or substrates (whichever is shorter) prior to the first dose of study treatment. Other protocol inclusion and exclusion criteria may apply.

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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.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    10 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Cancer Hospital Chinese Academy of Medical Sciences

    RECRUITING

    Beijing, China

  • Henan Cancer Hospital

    RECRUITING

    Zhengzhou, Henan, China

  • NEXT Oncology - Austin

    RECRUITING

    Austin, Texas, 78758, United States

  • SCRI Oncology Partners

    RECRUITING

    Nashville, Tennessee, 37203, United States

  • Sarah Cannon Research Institute at HealthONE

    RECRUITING

    Denver, Colorado, 80218, United States

  • Shanghai Pulmonary Hospital

    RECRUITING

    Shanghai, Shanghai Municipality, China

  • Sun Yat-Sen University Cancer Center

    RECRUITING

    Guangzhou, China

  • The University of Chicago Medical Center - Duchossois Center for Advanced Medicine

    RECRUITING

    Chicago, Illinois, 60637, United States

  • University Hospitals Cleveland Medical Center

    RECRUITING

    Cleveland, Ohio, 44106, United States

  • University of Pennsylvania - Abramson Cancer Center

    RECRUITING

    Philadelphia, Pennsylvania, 19104, United States

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