Analysis of BRCA Germline Mutations in Chinese Prostate Cancer Patients.

Recent studies have indicated that prostate cancer (PCa) with BRCA2 mutations is more aggressive. However, these reports mostly focused on Caucasus populations, and large-scale studies on BRCA mutations in Chinese PCa populations remain limited. Herein, we screened, from multiple centers in China, a total of 172 patients with PCa carrying BRCA1/2 germline mutations. The variant distribution and type, associated somatic variant, and frequency of the BRCA germline variants in these patients were analyzed retrospectively. We found that Chinese patients with PCa carrying BRCA1/2 germline mutations were diagnosed at an earlier age, i.e., 67 years (range, 34-89 years), and most had metastatic castration-resistant PCa (mCRPC) (54.65%, 94/172). The top three BRCA variants were frameshift, missense, and splicing variants. The overall pathogenic rates of the BRCA1 and BRCA2 variants were 17.46% (11/63) and 56.55% (82/145), respectively. Among the somatic mutations associated with BRCA2 germline mutations, the highest frequency was for FOXA1 (circulating tumor DNA [ctDNA] sequencing, 7.4%; tissue samples, 52%) and NCOR2 mutations (ctDNA sequencing, 7.4%; tissue samples, 24%); TP53 was the dominant somatic mutation associated with BRCA1 germline mutations (ctDNA sequencing, 25%; tissue samples, 17%). Ultimately, in Chinese patients, PCa with BRCA1/2 germline mutations tends to be more aggressive. Compared with BRCA1, BRCA2 has a higher frequency of germline pathogenic mutations. FOXA1, NCOR2, and TP53 somatic mutations associated with higher BRCA1/2 germline pathogenic mutations. Our description of BRCA germline mutations in the Chinese PCa patients provides more reference data for the precise diagnosis and treatment of Chinese PCa patients.

Frontiers in oncology. 2022 Feb 17*** epublish ***

Wei Chen, Wei Xia, Song Xue, Hang Huang, Qi Lin, Yi Liu, Tongtong Liu, Yiqun Zhang, Panwang Zhang, Jianfei Wang, Yining Yang, Baijun Dong, Zhixian Yu

Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China., Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China., Department of Urology, General Hospital of Eastern Theater Command, Nanjing, China., Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China., Research Institute, GloriousMed Clinical Laboratory Co., Ltd., Shanghai, China., Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.

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