NCT06353386 Substudy 01A: Safety and Efficacy of Opevesostat (MK-5684)-Based Treatment Combinations or Opevesostat Alone in Participants With Metastatic Castration-resistant Prostate Cancer (mCRPC) (MK-5684-01A)
| NCT ID | NCT06353386 |
| Status | Recruiting |
| Phase | Phase 1, Phase 2 |
| Sponsor | Merck Sharp & Dohme LLC |
| Condition | Prostatic Neoplasms, Castration-Resistant |
| Study Type | INTERVENTIONAL |
| Enrollment | 220 participants |
| Start Date | 2024-05-20 |
| Primary Completion | 2029-01-15 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.
This trial targets 220 participants in total. It began in 2024-05-20 with a primary completion date of 2029-01-15.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
Substudy 01A is part of a larger research study that is testing experimental treatments for metastatic castration-resistant prostate cancer (mCRPC). The larger study is the umbrella study (U01). The goal of substudy 01A is to evaluate the safety and efficacy of opevesostat-based treatment combinations, or as a single agent, in participants with mCRPC. This substudy will have two phases: a safety lead-in phase and an efficacy phase. The safety lead-in phase will be used to evaluate the safety and tolerability, and to establish a recommended Phase 2 dose (RP2D) for the opevesostat-based treatment combinations. There will be no hypothesis testing in this study.
Eligibility Criteria
Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Histologically or cytologically confirmed diagnosis of adenocarcinoma of the prostate without small cell histology. * Prostate cancer progression and received androgen deprivation therapy (ADT) or post bilateral orchiectomy within 6 months before screening. * Evidence of disease progression from either, \>4 weeks from last flutamide treatment, or \>6 weeks from last bicalutamide or nilutamide treatment, if receiving first generation anti-androgen therapy as last treatment therapy. * Current evidence of metastatic disease. * Prior treatment with 1 to 2 novel hormonal agent(s) (NHA) for non-metastatic, or metastatic, hormone-sensitive prostate cancer or castration-resistant prostate cancer and have disease progression during or after treatment. * Treatment with bone resorptive therapy (including, but not limited to, bisphosphonate or denosumab) must have been on stable doses for \>4 weeks before randomization. * Participants who experienced adverse events (AEs) due to previous anticancer therapies must have recovered to \<Grade 1 or baseline. * Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on antiretroviral therapy. * Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received Hepatitis B Virus (HBV) antiviral therapy for at least 4 weeks, and have undetectable HBV viral load. * Participants with a history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable. Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * History of pituitary dysfunction. * Poorly controlled diabetes mellitus. * Active or unstable cardio/cerebro-vascular disease, including thromboembolic events and history of stroke or transient ischemic attack within 6 months before the first dose of study intervention, history of myocardial infarction within 6 months before the first dose of study intervention, New York Heart Association Class III or IV cardiac disease or congestive heart failure, coronary heart disease that is symptomatic, or unstable angina * History or family history of long corrected QT interval (QTc) syndrome. * Myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) or features suggestive of MDS/AML. * History or current condition of adrenal insufficiency. * History of (noninfectious) pneumonitis requiring steroids, or current pneumonitis. * HIV-infected participants with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease. * Undergone major surgery, including local prostate intervention (except prostate biopsy) within 28 days before randomization, and has not recovered from the toxicities and/or complications. * Is on an unstable dose of thyroid hormone therapy within 6 months prior to first dose of study intervention. * Received a whole blood transfusion in the last 120 days before randomization (packed red blood cells and platelet transfusions are acceptable if not given within 28 days before randomization). * Received prior systemic anticancer therapy including investigational agents within 4 weeks before randomization. * Received prior radiotherapy within 2 weeks of start of study intervention or radiation-related toxicities, requiring corticosteroids. * Received a live or live-attenuated vaccine within 30 days before the first does of study intervention. Administration of killed vaccines is allowed. * Diagnosis of immunodeficiency, or is receiving chronic systemic steroid therapy, or any other form of immunosuppressive therapy, within 7 days prior to the first dose of study intervention. * Known additional malignancy that is progressing or has required active treatment within the past 3 years. * Known active central nervous system (CNS) metastases and/or carcinomatous meningitis. * Active autoimmune disease that has required systemic treatment in the past 2 years. * Active infection requiring systemic therapy. * Concurrent active HBV or HCV infections.
Contact & Investigator
Medical Director
STUDY DIRECTOR
Merck Sharp & Dohme LLC
Frequently Asked Questions
Who can join the NCT06353386 clinical trial?
This trial is open to participants of all sexes, aged 18 Years or older, studying Prostatic Neoplasms, Castration-Resistant. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
What phase is the NCT06353386 trial and what does that mean for participants?
Phase 1 trials are the first stage of human testing. The primary goal is to assess safety and determine appropriate dosage levels. Participants are closely monitored. These trials typically involve a small number of volunteers.
Is NCT06353386 currently recruiting?
Yes, NCT06353386 is actively recruiting participants. Contact the research team at Trialsites@msd.com for enrollment information.
Where is the NCT06353386 trial being conducted?
This trial is being conducted at La Jolla, United States, Los Angeles, United States, Miami, United States, Baltimore, United States and 11 additional locations.
Who is sponsoring the NCT06353386 clinical trial?
NCT06353386 is sponsored by Merck Sharp & Dohme LLC. The principal investigator is Medical Director at Merck Sharp & Dohme LLC. The trial plans to enroll 220 participants.