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New pill for Hard-to-Treat cancers shows early promise in small study

NCT ID NCT06625515

Disease control Sponsor: Accent Therapeutics Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This early-stage study tested a new oral drug, ATX-559, in 17 people with advanced solid tumors that had stopped responding to standard treatments. The main goal was to find a safe dose and check for side effects. The study was terminated early, so results are limited.

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

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

17 people

The number who actually took part.

Started

Oct 2024

Finished

Jan 2026

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.

Key Inclusion Criteria: * Patients with histologically confirmed solid tumors who have locally recurrent or metastatic disease * Refractory to or relapsed after all standard therapies with proven clinical benefit, unless as deemed by the Investigator, the subject is not a candidate for standard treatment, there is no standard treatment, or the subject refuses standard treatment after expressing an understanding of all available therapies with proven clinical benefit * For the expansion cohorts, participants must have histological confirmation of the specified tumor types: * BRCA1 or BRCA2 deficient, HER2 negative metastatic breast cancer * dMMR or MSI-H with unresectable or metastatic solid tumors * There is no limit to the number of prior treatment regimens * Have measurable or evaluable disease * Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 Key Exclusion Criteria: * Clinically unstable central nervous system (CNS) tumors or brain metastasis * Any other concurrent anti-cancer treatment * Has undergone a major surgery within 3 weeks of starting study treatment * Medical issue that limits oral ingestion or impairment of gastrointestinal function that is expected to significantly reduce the absorption of ATX-559 * Clinically significant (ie, active) or uncontrolled cardiovascular disease * Unable to transition off strong or moderate CYP2C8 inhibitors or inducers * Pregnancy or intent to breastfeed or conceive a child within the projected duration of treatment Other inclusion and exclusion criteria as defined in the study protocol

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Conditions

The condition(s) this trial relates to.

breast cancer colon carcinoma colonic neoplasm colorectal cancer endometrial cancer endometrium neoplasm Her2-receptor negative breast cancer metastatic malignant neoplasm Microsatellite Instability neoplasm rectal neoplasm rectum adenocarcinoma

As listed by the trial registrant

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

Advanced solid tumors Breast cancer recurrent Colon cancer Colorectal cancer metastatic Endometrial cancer Rectal adenocarcinoma

Contacts and locations

Locations

  • NEXT Oncology

    San Antonio, Texas, 78229, United States

  • SCRI Oncology Partners

    Nashville, Tennessee, 37203, United States

  • Stephenson Cancer Center at OU Medicine

    Oklahoma City, Oklahoma, 73104, United States

  • The University of Texas MD Anderson Cancer Center

    Houston, Texas, 77030, United States

  • University of Colorado Cancer Center - Anschutz Medical Campus,

    Aurora, Colorado, 80045, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.