Search results for: HDAC3 controls male fertility through enzyme-independent transcriptional regulation at the meiotic exit of spermatogenesis.
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HDAC3 controls male fertility through enzyme-independent transcriptional regulation at the meiotic exit of spermatogenesis.
The transition from meiotic spermatocytes to postmeiotic haploid germ cells constitutes an essential step in spermatogenesis. The epigenomic regulatory mechanisms underlying this transition remain unclear. Here, we find a prominent transcriptomic switch from the late spermatocytes to the early round spermatids during the meiotic-to-postmeiotic transition, which is associated with robust histone acetylation changes across the genome. Among histone deacetylases (HDACs) and acetyltransferases, we find that HDAC3 is selectively expressed in the late meiotic and early haploid stages. Three independent mouse lines with the testis-specific knockout of HDAC3 show infertility and defects in meiotic exit with an arrest at the late stage of meiosis or early stage of round spermatids. Stage-specific RNA-seq and histone acetylation ChIP-seq analyses reveal that HDAC3 represses meiotic/spermatogonial genes and activates postmeiotic haploid gene programs during meiotic exit, with associated histone acetylation alterations. Unexpectedly, abolishing HDAC3 catalytic activity by missense mutations in the nuclear receptor corepressor (NCOR or SMRT) does not cause infertility, despite causing histone hyperacetylation as HDAC3 knockout, demonstrating that HDAC3 enzyme activity is not required for spermatogenesis. Motif analysis of the HDAC3 cistrome in the testes identified SOX30, which has a similar spatiotemporal expression pattern as HDAC3 during spermatogenesis. Depletion of SOX30 in the testes abolishes the genomic recruitment of the HDAC3 to the binding sites. Collectively, these results establish the SOX30/HDAC3 signaling as a key regulator of the transcriptional program in a deacetylase-independent manner during the meiotic-to-postmeiotic transition in spermatogenesis.Huiqi Yin, Zhenlong Kang, Yingwen Zhang, Yingyun Gong, Mengrou Liu, Yanfeng Xue, Wenxiu He, Yanfeng Wang, Shuya Zhang, Qiushi Xu, Kaiqiang Fu, Bangjin Zheng, Jie Xie, Jinwen Zhang, Yuanyuan Wang, Mingyan Lin, Yihan Zhang, Hua Feng, Changpeng Xin, Yichun Guan, Chaoyang Huang, Xuejiang Guo, P Jeremy Wang, Joseph A Baur, Ke Zheng, Zheng Sun, Lan Ye
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