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BCAS2 is involved in alternative mRNA splicing in spermatogonia and the transition to meiosis

Wenbo Liu, Fengchao Wang, Qianhua Xu, Junchao Shi, Xiaoxin Zhang, Xukun Lu, Zhen-Ao Zhao, Zheng Gao, Huaixiao Ma, Enkui Duan, Fei Gao, Shaorong Gao (), Zhaohong Yi () and Lei Li ()
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Wenbo Liu: School of Life Sciences, University of Science and Technology of China
Fengchao Wang: National Institute of Biological Sciences
Qianhua Xu: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Junchao Shi: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Xiaoxin Zhang: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Xukun Lu: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Zhen-Ao Zhao: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Zheng Gao: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Huaixiao Ma: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Enkui Duan: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Fei Gao: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences
Shaorong Gao: School of Life Sciences and Technology, Tongji University
Zhaohong Yi: Key Laboratory of Urban Agriculture (North) of Ministry of Agriculture, College of Biological Science and Engineering, Beijing University of Agriculture
Lei Li: State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract Breast cancer amplified sequence 2 (BCAS2) is involved in multiple biological processes, including pre-mRNA splicing. However, the physiological roles of BCAS2 are still largely unclear. Here we report that BCAS2 is specifically enriched in spermatogonia of mouse testes. Conditional disruption of Bcas2 in male germ cells impairs spermatogenesis and leads to male mouse infertility. Although the spermatogonia appear grossly normal, spermatocytes in meiosis prophase I and meiosis events (recombination and synapsis) are rarely observed in the BCAS2-depleted testis. In BCAS2 null testis, 245 genes are altered in alternative splicing forms; at least three spermatogenesis-related genes (Dazl, Ehmt2 and Hmga1) can be verified. In addition, disruption of Bcas2 results in a significant decrease of the full-length form and an increase of the short form (lacking exon 8) of DAZL protein. Altogether, our results suggest that BCAS2 regulates alternative splicing in spermatogonia and the transition to meiosis initiation, and male fertility.

Date: 2017
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DOI: 10.1038/ncomms14182

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