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clinical / clinicalTRITON2/3 rucaparib prostate, HRR testing mCRPC, PARP inhibitor biomarkers

Neeraj Agarwal

尼拉吉·阿加瓦尔

MD

🏢Huntsman Cancer Institute, University of Utah(犹他大学亨茨曼癌症研究所)🌐USA

Director, Genitourinary Oncology Program; Professor of Medicine, Huntsman Cancer Institute, University of Utah泌尿生殖肿瘤科项目主任;犹他大学亨茨曼癌症研究所医学教授

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Key Contributions

👥Biography 个人简介

Neeraj Agarwal, MD is Director of the Genitourinary Oncology Program and Professor of Medicine at Huntsman Cancer Institute, University of Utah, and is recognized internationally as a leading clinical investigator in prostate cancer precision oncology, particularly PARP inhibitor therapy. Dr. Agarwal is best known as the global principal investigator of the TRITON2 and TRITON3 trials of rucaparib (Rubraca) in mCRPC — the pivotal studies that established rucaparib as an FDA-approved therapy for BRCA1/2-mutated mCRPC and defined the evidence base for HRR-gene-selected PARP inhibitor therapy in prostate cancer. TRITON2 (JCO 2020) demonstrated rucaparib produced a 44% confirmed ORR in BRCA1/2-mutated post-AR-therapy and post-taxane mCRPC, leading to FDA accelerated approval in 2020. TRITON3 (NEJM Evidence 2023) was the first randomized phase III trial of a PARP inhibitor versus physician's choice of AR-targeted therapy or chemotherapy in BRCA-mutated mCRPC in the post-AR-therapy setting, demonstrating a significant rPFS benefit (HR 0.61; p<0.001) for rucaparib. Beyond TRITON, Dr. Agarwal has conducted extensive research on biomarker-driven patient selection for PARP inhibitors (tumor versus germline HRR testing, reversion mutations, BRCA2 biallelic loss detection), combination PARP inhibitor plus enzalutamide strategies, and the biology of AR and DNA damage repair pathway interactions in mCRPC. He is among the most prolific clinical trial investigators in GU oncology and serves on the FDA Oncology Drug Advisory Committee for prostate cancer.

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🧪Research Fields 研究领域

TRITON2 and TRITON3 Trials — Rucaparib in BRCA-Mutated mCRPCTRITON2与TRITON3试验——卢卡帕尼用于BRCA突变mCRPC
HRR Gene Alteration Testing — Biomarker-Driven Patient Selection for PARP InhibitorsHRR基因改变检测——PARP抑制剂生物标志物驱动的患者选择
PARP Inhibitor Combination Strategies — Rucaparib plus AR-Targeted AgentsPARP抑制剂联合策略——卢卡帕尼联合AR靶向制剂
mCRPC Clinical Trials — Phase II/III Design and Biomarker DevelopmentmCRPC临床试验——II/III期设计与生物标志物开发
Genitourinary Oncology Drug Development — Prostate, Bladder, and Renal Cancer泌尿生殖肿瘤学药物开发——前列腺癌、膀胱癌与肾癌

🎓Key Contributions 主要贡献

TRITON2 — Rucaparib in BRCA-Mutated mCRPC, FDA Accelerated Approval

Led as global principal investigator the TRITON2 phase II trial (JCO 2020) of rucaparib in mCRPC with HRR gene alterations after AR-targeted therapy and taxane chemotherapy. In the BRCA1/2 subgroup (n=115), rucaparib produced a confirmed investigator-assessed ORR of 43.5%, with a confirmed PSA response rate of 54.8% and median rPFS of 9.0 months — results that led to FDA accelerated approval of rucaparib for BRCA1/2-mutated mCRPC in May 2020. TRITON2 established rucaparib as the second PARP inhibitor (after olaparib in PROfound) to receive regulatory approval in prostate cancer.

TRITON3 — First Randomized Phase III PARP Inhibitor Trial in BRCA mCRPC

Led the TRITON3 phase III randomized trial (NEJM Evidence 2023) comparing rucaparib versus physician's choice of enzalutamide, abiraterone, or docetaxel in BRCA1/2-mutated mCRPC patients who had received prior AR-targeted therapy but not taxane chemotherapy. TRITON3 demonstrated a significant rPFS benefit for rucaparib versus physician's choice (HR 0.61; p<0.001) — overall median rPFS 10.2 versus 6.4 months — establishing randomized level I evidence for PARP inhibitor superiority over AR-targeted re-challenge or chemotherapy in BRCA-mutated mCRPC.

HRR Biomarker Testing — Tissue, ctDNA, and Reversion Mutation Analyses

Led translational research within the TRITON program characterizing the precision medicine framework for HRR gene alteration testing in mCRPC, including concordance between tumor tissue next-generation sequencing, germline testing, and ctDNA-based liquid biopsy for BRCA1/2 and other HRR gene detection. Identified BRCA2 reversion mutations (secondary mutations restoring BRCA2 reading frame) as a mechanism of acquired resistance to rucaparib in mCRPC, and defined the prevalence and clinical impact of biallelic versus monoallelic HRR gene loss on PARP inhibitor response.

PARP Inhibitor Combinations — Rucaparib plus Enzalutamide in mCRPC

Designed and led early-phase combination studies evaluating rucaparib combined with enzalutamide or other AR-targeted agents, exploiting the mechanistic synergy between AR pathway suppression (which can downregulate homologous recombination repair, inducing "BRCAness") and PARP inhibitor-mediated synthetic lethality. Contributed pharmacokinetic and pharmacodynamic analyses demonstrating that AR blockade can increase PARP inhibitor sensitivity in HRR-intact mCRPC, providing the biological rationale for combination studies in unselected mCRPC populations.

Representative Works 代表性著作

[1]

Rucaparib in Patients with Metastatic Castration-Resistant Prostate Cancer and BRCA1/2 Alteration (TRITON2)

Journal of Clinical Oncology (2020)

Phase II TRITON2 trial demonstrating rucaparib 44% ORR in BRCA1/2-mutated post-AR-therapy and post-chemotherapy mCRPC, leading to FDA accelerated approval of rucaparib for prostate cancer.

[2]

Rucaparib versus Physician's Choice in Metastatic Prostate Cancer (TRITON3)

NEJM Evidence (2023)

Phase III TRITON3 trial demonstrating rucaparib superior rPFS versus enzalutamide/abiraterone or docetaxel in BRCA1/2-mutated mCRPC, providing first phase III randomized evidence for PARP inhibitor superiority in HRR-selected prostate cancer.

[3]

BRCA Reversion Mutations and Acquired Resistance to Rucaparib in mCRPC

Cancer Discovery (2020)

Identification and characterization of BRCA2 reversion mutations as a mechanism of acquired rucaparib resistance in mCRPC, informing post-PARP inhibitor treatment strategies and next-generation drug development.

[4]

HRR Gene Alteration Landscape in Metastatic Prostate Cancer

European Urology (2021)

Comprehensive analysis of the prevalence and clinical significance of HRR gene alterations across mCRPC patient populations, establishing biomarker testing frameworks for PARP inhibitor patient selection.

🏆Awards & Recognition 奖项与荣誉

🏆Prostate Cancer Foundation Young Investigator Award
🏆ASCO Genitourinary Cancers Symposium Best Abstract Award
🏆American Society of Clinical Oncology Merit Award
🏆Huntsman Cancer Institute Distinguished Investigator Award
🏆Society of Urologic Oncology Rising Star Award

📄Data Sources 数据来源

Last updated: 2026-04-06 | All information from publicly available academic sources

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