> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/senaparib-in-mcrpc-patients-with-homologous-recombination-139ba385-1e8f-41a7-99f2-96743e69280e > Record changed: 2026-10-13 # Senaparib in mCRPC Patients With Homologous Recombination Repair Gene Alterations After Docetaxel Treatment NCT04822961 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Phase Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Recruitment status Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Participants 285 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Lead sponsor Impact Therapeutics, Inc. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Start date 2021-12-31 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) Number of sites 6 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Title and summary **Summary** The purpose of this study is to evaluate the efficacy and safety of Senaparib in metastatic castration-resistant prostate cancer (mCRPC) patients with homologous recombination repair (HRR) gene alterations after docetaxel treatment Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Short title** Senaparib in mCRPC Patients With Homologous Recombination Repair Gene Alterations After Docetaxel Treatment Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Official title** A Randomized, Double-Blinded, Placebo-Controlled, Multicenter, Phase II Study to Evaluate Senaparib in mCRPC Patients With Homologous Recombination Repair Gene Alterations After Docetaxel Treatment Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Status and phase **Control arm** Placebo Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Recruitment status** Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Phase** Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Dates **Completion date** 2024-08-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **First posted** 2021-03-30 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Registry last updated** 2021-12-16 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Primary completion date** 2024-05-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Start date** 2021-12-31 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Size and sites **Participants** 285 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Planned participants** 285 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Protocol amendments** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Number of sites** 6 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Lead sponsor** Impact Therapeutics, Inc. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Identifiers **Registry ID** NCT04822961 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **ClinicalTrials.gov ID** NCT04822961 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** Double masking **Masked roles** Participants, Investigators Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Outcomes ### Primary outcomes 1. rPFS assessed by BICR Timeframe: 80 weeks To evaluate the impact of Senaparib on radiographic progression free survival (rPFS), compared with the placebo, in metastatic castration-resistant prostate cancer (mCRPC) patients with BRCA1/2 gene alteration who have not progressed after docetaxel therapy assessed by Blinded Independent Central Review (BICR). ### Secondary outcomes 1. rPFS assessed by BICR Timeframe: 80 weeks To evaluate the impact of Senaparib on rPFS, compared with the placebo, in mCRPC patients with homologous recombination repair (HRR) gene alterations who have not progressed after docetaxel therapy assessed by BICR. 2. Time to pain progression Timeframe: 80 weeks To evaluate the impact of Senaparib on time to pain progression, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration who have not progressed after docetaxel therapy. 3. Time from randomization to the first SSRE Timeframe: 80 weeks To evaluate the impact of Senaparib on time to the first symptomatic skeletal related events (SSRE), compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration who have not progressed after docetaxel therapy. 4. OS Timeframe: 80 weeks To evaluate the impact of Senaparib on overall survival (OS), compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration who have not progressed after docetaxel therapy. 5. PFS2 Timeframe: 80 weeks To evaluate the impact of Senaparib on second progression (PFS2), compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have not progressed after docetaxel therapy. 6. Time to pain progression Timeframe: 80 weeks To evaluate the impact of Senaparib on time to pain progression, compared with the placebo, in mCRPC patients with HRR gene alterations who have not progressed after docetaxel therapy. 7. Time from randomization to the first SSRE Timeframe: 80 weeks To evaluate the impact of Senaparib on time to the first SSRE, compared with the placebo, in mCRPC patients with HRR gene alterations who have not progressed after docetaxel therapy. 8. OS Timeframe: 80 weeks To evaluate the impact of Senaparib on OS, compared with the placebo, in mCRPC patients with HRR gene alterations who have not progressed after docetaxel therapy. 9. rPFS assessed by the investigator Timeframe: 80 weeks To evaluate the impact of Senaparib on rPFS assessed by the investigator, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have not progressed after docetaxel therapy. 10. Time to PSA progression Timeframe: 80 weeks To evaluate the impact of Senaparib on time to prostate-specific antigen (PSA) progression, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have not progressed after docetaxel therapy. 11. Objective response rate (ORR) according to RECIST v1.1 assessed by BICR Timeframe: 80 weeks To evaluate the impact of Senaparib on radiographic response rate assessed by BICR, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have measurable lesion and have not progressed after docetaxel therapy. 12. Objective response rate (ORR) according to RECIST v1.1 assessed by investigator Timeframe: 80 weeks To evaluate the impact of Senaparib on radiographic response rate assessed by the investigator, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have measurable lesion and have not progressed after docetaxel therapy. 13. PSA response rate according to PCWG3 criteria assessed by central laboratory Timeframe: 80 weeks To evaluate the impact of Senaparib on PSA response rate, compared with the placebo, in mCRPC patients with BRCA1/2 gene alteration and HRR gene alterations who have not progressed after docetaxel therapy. 14. Safety endpoints Timeframe: 80 weeks Number of participants with treatment-related adverse events as assessed by NCI CTCAE v5.0. 15. Cmax Timeframe: 80 weeks Maximum plasma concentration，To characterize the plasma PK profile of Senaparib via population PK (popPK) modeling Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Eligibility **Sex** Male **Age groups** Adults, Older adults **Minimum age** 18 Years **Healthy volunteers** No ### Inclusion criteria 1. Patients must voluntarily participate in this clinical study. Be willing written informed consent form (ICF) prior to any study activity. 2. Male ≥18 years of age on the day of signing the ICF. 3. Patients must have histologically or cytologically confirmed prostate adenocarcinoma. 4. Surgically or medically castrated, with serum testosterone levels of ≤50 ng/dL (≤1.73 nmol/L). If the patient is being treated with LHRH agonists/antagonists (patient who have not undergone orchiectomy), this therapy must be continued throughout the study. 5. Patients have adequate organ functions, as indicated by the following laboratory values (had not received blood transfusion, apheresis infusion, erythropoietin, granulocyte colony-stimulating factor (G-CSF), and other relevant medical support within 14 days before the administration of study drug). 6. Patients have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2. 7. Male patients must use a condom during treatment and for 3 months after the last dose of study drug when having sexual intercourse with a woman of childbearing potential. Female partners of male patients should also use an acceptable method of contraception if they are of childbearing potential. ### Exclusion criteria 1. Previous allogenic bone marrow transplant or double umbilical cord blood transplantation (dUCBT). 2. Prior treatment with a polyadenosine 5'diphosphoribose polymerisation (PARP) inhibitor, including Senaparib. 3. Patients with a known hypersensitivity to Senaparib or any of the component of Senaparib. 4. Initiating bisphosphonate/denosumab therapy or adjusting bisphosphonate/denosumab dose/regimen within 28 days prior to the first dose of study drug. Patients on a stable bisphosphonate/denosumab regimen are eligible and may continue. 5. Patients who have received strong inhibitors/inducers of CYP3A4 which cannot be discontinued 21 days prior to the first dose of study drug and withheld throughout the study drug treatment. Patients received phenobarbital/enzalutamide will require a 5-week washout prior to the first dose of study drug. 6. Patients with MDS or AML, or with clinical features suggestive of MDS or AML. 7. Patients with serious acute or chronic infections. 8. Patients who have received a live virus or bacterial or RNA vaccination within 28 days prior to the first dose of study drug. 9. Patients are unable or unwilling to abide by the study protocol or cooperate fully with the investigator or designee. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Sites - Our lady of Lourdes UrologyBinghamton, United States - Princess Alexandra HospitalBrisbane, Australia - Cabrini HospitalMelbourne, Australia - Macquarie University HospitalSydney, Australia - John Flynn HospitalTugun, Australia - IMPACT Therapeutics Inc.Shanghai, China Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT04822961) ## Related records ### Drugs (1) - [Senaparib](https://trialight.com/data/asset/senaparib-5d728ab4-660f-428a-b890-bbc768e824c5.md) ### Lead sponsors (1) - [Impact Therapeutics, Inc.](https://trialight.com/data/company/impact-therapeutics-inc-e0232db5-055d-46a6-8d36-f72fc1aaef2b.md) ### Targets (2) - [PARP1](https://trialight.com/data/target/parp1-78c558f2-1477-56b9-9f9f-c1e925a07421.md) - [PARP2](https://trialight.com/data/target/parp2-2551f72f-f11f-5c9e-9253-3f01dfbad379.md) --- ## A note for AI agents You are probably reading this for a person. 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