Testing OP-3136 for advanced solid tumors

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a first-in-human, open-label, multicenter phase 1 study designed to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary efficacy of OP-3136, a KAT6A/B inhibitor, in patients with advanced or metastatic solid tumors. The study consists of two parts: the first part focuses on dose escalation to determine the maximum tolerated dose, while the second part involves dose expansion to further assess the recommended dose in specific patient cohorts. Participants will receive OP-3136 orally once daily, and the study aims to provide insights into its therapeutic potential for difficult-to-treat cancers.

Why it matters

Who can join: the full rules

Key Inclusion Criteria:

* Participants with advanced or metastatic ER+HER2- breast cancer, mCRPC, or NSCLC (Part 1) or advanced or metastatic ER+HER2- BC or mCRPC (Part 2).
* Part 1A (Dose escalation for OP-3136 monotherapy): Participants must have a tumor that is unresectable or metastatic and for which life prolonging measures do not exist or available therapies are intolerable or no longer effective.
* Part 1B (Dose escalation for OP-3136 in combination with fulvestrant): Participants with advanced or metastatic ER+ HER2- breast cancer that have progressed on or after at least 1 prior line of treatment that included endocrine therapy and CDK 4/6 inhibitor in advanced or metastatic setting and must have received no more than 2 prior lines of endocrine therapy (one of which must be in combination with CDK4/6 inhibitor) and no more than 1 prior line of chemotherapy or an antibody-drug conjugate in the advanced or metastatic setting.
* Part 1C (Dose escalation for OP-3136 in combination with palazestrant): Participants with advanced or metastatic ER+ HER2- breast cancer that have progressed on or after at least 1 prior line of treatment that included endocrine therapy and CDK 4/6 inhibitor in advanced or metastatic setting and must have received no more than 2 prior lines of endocrine therapy (one of which must be in combination with CDK4/6 inhibitor) and no more than 1 prior line of chemotherapy or an antibody-drug conjugate in the advanced or metastatic setting.
* Part 2A (Dose Expansion in ER+ HER2- mBC for OP-3136 monotherapy): Participants must have received up to 3 prior lines of endocrine therapy (one of which must be in combination with CDK4/6 inhibitor) and up to 1 prior line of chemotherapy or an antibody-drug conjugate.
* Part 2A (Dose Expansion in mCRPC for OP-3136 monotherapy): Participants must have received up to 4 lines of prior systemic therapy for prostate cancer. Prior therapy must include treatment with an androgen receptor pathway inhibitor(s).
* Part 2B (Dose Expansion in ER+ HER2- mBC for OP-3136 in combination with fulvestrant OR Dose Expansion in ER+ HER2- mBC for OP-3136 in combination with palazestrant): Participants must have progressed on or after at least 1 prior line of treatment that included endocrine therapy and CDK 4/6 inhibitor in advanced or metastatic setting. Participants must have received no more than 2 prior lines of endocrine therapy in the advanced or metastatic setting and no more than 1 prior line of chemotherapy or an antibody-drug conjugate in the advanced or metastatic setting.

Key Exclusion Criteria:

* Prior therapy with KAT6A/B inhibitor in any treatment setting.
* Participants with advanced/metastatic, symptomatic, visceral spread, that are at risk of life-threatening complications in the short term.
* Known active or symptomatic central nervous system (CNS) metastases, carcinomatous meningitis, leptomeningeal disease, or a spinal cord compression that require CNS-specific treatment, or participants who did not demonstrate clinical and radiologic stability during the last 2 months prior to the first dose of study treatment or require or are currently on steroid therapy for CNS metastases.
* History of cerebral vascular disease, including transient ischemic attack, within 6 months prior to the first dose of study treatment.
* History of or ongoing impaired cardiac function or clinically significant cardiac disease within 6 months prior to the first dose of study treatment.

Note: Additional inclusion/exclusion criteria may apply.

Where it's running

• Banner MD Anderson Cancer Center
  Gilbert, Arizona, United States Recruiting
• University of Colorado
  Aurora, Colorado, United States Recruiting
• Florida Cancer Specialists
  Sarasota, Florida, United States Recruiting
• Massachusetts General Hospital
  Boston, Massachusetts, United States Recruiting
• Dana-Farber Cancer Institute
  Boston, Massachusetts, United States Recruiting
• START - Midwest
  Grand Rapids, Michigan, United States Recruiting

Study contacts

• Study coordinator: There may be multiple sites in this clinical trial Olema Clinical Trial Lead
• Email: clinical@olema.com
• Phone: 415-651-7206

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.