Status: Closed
Activation Date: 2017FEB09
Closing Date: 2021DEC13
Phase: II
Description: A Phase II Study of Palbociclib, A CDK4/6 Inhibitor, in Patients with Metastatic Castration-Resistant Prostate Cancer
Eligibility: Patients (>=18 years old, ECOG PS 0-1) must have histologically confirmed mCRPC with no evidence of small cell/neuroendocrine differentiation. Patients will be pre-screened for CCDN1 amplification and RB1 status. Clinically/radiologically documented disease (measurable or non-measurable). Evidence of biochemical and/or radiological disease progression in the setting of surgical or medical castration. Patients must have received prior hormonal treatment with at least one of abiraterone acetate, enzalutamide, ARN-509 TAK-700 and TOK-001. Prior anti-androgen therapy must have been discontinued >=28 days (>=42 days for bicalutamide) prior to registration. Maximum of one prior regimen of cytotoxic chemotherapy permitted. Prior immunotherapy, vaccines and oncolytic viruses permitted. Prior/concurrent CDK or mTOR inhibitors, strontium-89, systemic corticosteriods equivalent to prednisone >10 mg daily not allowed. Potent/strong CYP3A inhibitors/inducers not allowed.
Objective: PRIMARY - To assess the clinical benefit rate (CBR) of palbociclib in patients with metastatic, castration-resistant prostate cancer (mCRPC). SECONDARY - (1) To determine the effect of palbociclib on PSA decline and time to PSA progression; (2) To determine objective response as determined by RECIST 1.1 criteria; (3) To evaluate the safety and toxicity profile of palbociclib in mCRPC patients. EXPLORATORY - (1) To determine whether CCND1 gain/amplification in plasma cell-free DNA (cfDNA) (+/-RB1 wild type) is predictive of CBR to palbociclib; (2) To evaluate gene copy number variation and mutation profile of cfDNA in patients with mCRPC before and after treatment with palbociclib; (3) To identify potential predictive and prognostic blood-based RNA markers.
Participation: Limited to invited centres
Lay Description: The purpose of this study is to find out what effects a new drug, palbociclib, has on prostate cancer and will look at the side effects of treatment with palbociclib. The researchers doing this study are also interested in looking for markers that may help predict which patients are most likely to be helped by palbociclib and to see how the cancer cells respond to palbociclib.
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Hide Tissue Samples
| Disease Site | Trial Code | Patients Accrued | Patients - Blocks | Patients - Slides | Patients - Blocks and/or Slides |
| IND | I223 | 57 | 0 | 3 | 3 |
(Core size is 0.6 mm)
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Fluid Samples| Disease Site | Trial Code | Patients Accrued | TMA Blocks | Patients on TMA Blocks |
| IND | I223 | 57 | 0 | 0 |
| Disease Site | Trial Code | Patients Accrued | Patients - Whole Blood | Patients - Cellular Component of Blood | Patients - DNA extracted from Blood | Patients - RNA extracted from Blood | Patients - Plasma | Patients - Serum | Patients - Urine | Patients - Buccal |
| IND | I223 | 57 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |