alexa Abstract | Whole-Exome Sequencing Identifies Novel Somatic Mutations in Chinese Breast Cancer Patients
ISSN: 1747-0862

Journal of Molecular and Genetic Medicine
Open Access

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Research Article Open Access

Abstract

Most breast cancer genomes harbor complex mutational landscapes. Somatic alterations have been predominantly discovered in breast cancer patients of European ancestry; however, little is known about somatic aberration in patients of other ethnic groups including Asians. In the present study, whole-exome sequencing (WES) was conducted in DNA extracted from tumor and matched adjacent normal tissue samples from eleven early onset breast cancer patients who were included in the Shanghai Breast Cancer Study. We discovered 159 somatic missense and ten nonsense mutations distributed among 167 genes. The most frequent 50 somatic mutations identified by WES were selected for validation using Sequenom MassARRAY system in the eleven breast cancer patients and an additional 433 tumor and 921 normal tissue/blood samples from the Shanghai Breast Cancer Study. Among these 50 mutations selected for validation, 32 were technically validated. Within the validated mutations, somatic mutations in the TRPM6, HYDIN, ENTHD1, and NDUFB10 genes were found in two or more tumor samples in the replication stage. Mutations in the ADRA1B, CBFB, KIAA2022, and RBM25 genes were observed once in the replication stage. To summarize, this study identified some novel somatic mutations for breast cancer. Future studies will need to be conducted to determine the function of these mutations/genes in the breast carcinogenesis.

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Author(s): Yanfeng Zhang, Qiuyin Cai, Xiao-Ou Shu, Yu-Tang Gao, Chun Li, Wei Zheng and Jirong Long

Keywords

Breast cancer, Somatic mutation, Exome sequencing, Chinese population, Breast cancer, Somatic mutation

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