A Study of CHeckpoint Inhibitors in Men With prOgressive Metastatic Castrate Resistant Prostate C… (NCT04104893) | Clinical Trial Compass
Active — Not RecruitingPhase 2
A Study of CHeckpoint Inhibitors in Men With prOgressive Metastatic Castrate Resistant Prostate Cancer Characterized by a Mismatch Repair Deficiency or Biallelic CDK12 Inactivation
United States40 participantsStarted 2020-02-20
Plain-language summary
The primary objective is to assess the activity and efficacy of pembrolizumab, a checkpoint inhibitor, in Veterans with metastatic castration-resistant prostate cancer (mCRPC) characterized by either mismatch repair deficiency (dMMR) or biallelic inactivation of CDK12 (CDK12-/-). The secondary objectives involve determining the frequency with which dMMR and CDK12-/- occur in this patient population, as well as the effects of pembrolizumab on various clinical endpoints (time to PSA progression, maximal PSA response, time to initiation of alternative anti-neoplastic therapy, time to radiographic progression, overall survival, and safety and tolerability). Lastly, the study will compare the pre-treatment and at-progression metastatic tumor biopsies to investigate the molecular correlates of resistance and sensitivity to pembrolizumab via RNA-sequencing, exome-sequencing, selected protein analyses, and multiplexed immunofluorescence.
Who can participate
Age range18 Years
SexMALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Subject must be 18 years of age or older at the time the Informed Consent is signed.
* The subject (or legally acceptable representative if applicable) must provide written informed consent for the trial.
* Pathologic diagnosis of prostate cancer of adenocarcinoma or small cell histology.
* Metastatic disease as documented by technetium-99m (99mTc) bone scan or metastatic lesions by computed tomography (CT) or magnetic resonance imaging (MRI) scans (visceral or lymph node disease). CT-portion of FDG-PET/CT or scan may be used for eligibility. NaF PET-CT is an alternative to 99mTc bone scan. If lymph node metastasis is the only evidence of metastatic disease, it must be 1.5 cm in short axis and above the level of the iliac bifurcation. Imaging studies for the purpose of determining eligibility must be completed within 60 days of Day 1.
* Progressive castration resistant prostate cancer as defined by serum testosterone \< 50 ng/mL and one of the following:
* PSA progression confirmed per Prostate Cancer Clinical Trials Working Group (PCWG3),
* Radiographic progression of soft tissues according to Response Evaluation Criteria in Solid Tumors, version 1.1 (iRECIST 1.1) modified based on PCWG3, or radiographic progression of bone according to PCWG3.
* Prior use of a novel AR signaling inhibitor for 4 weeks, including abiraterone acetate plus prednisone/prednisolone, enzalutamide, apalutamide, and/or darolutamide.
NOTE: These AR signaling inhibitors may…
What they're measuring
1
PSA Decline
Timeframe: 12 weeks of therapy
2
Objective Response Rate
Timeframe: First day of Pembrolizumab administration to 6 months after