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- W2561386110 abstract "Sirt1 is a member of the sirtuin family of proteins and has important roles in numerous biological processes. Sirt1−/- mice display an increased frequency of abnormal spermatozoa, but the mechanism of Sirt1 in spermiogenesis remains largely unknown. Here, we report that Sirt1 might be directly involved in spermiogenesis in germ cells but not in steroidogenic cells. Germ cell-specific Sirt1 knockout mice were almost completely infertile; the early mitotic and meiotic progression of germ cells in spermatogenesis were not obviously affected after Sirt1 depletion, but subsequent spermiogenesis was disrupted due to a defect in acrosome biogenesis, which resulted in a phenotype similar to that observed in human globozoospermia. In addition, LC3 and ATG7 deacetylation was disrupted in the spermatids after knocking out Sirt1, which affected the redistribution of LC3 from the nucleus to the cytoplasm and the activation of autophagy. Furthermore, Sirt1 depletion resulted in the failure of LC3 to be recruited to Golgi apparatus-derived vesicles and in the failure of GOPC and PICK1 to be recruited to nucleus-associated acrosomic vesicles. Taken together, our findings reveal that Sirt1 has a novel physiological function in acrosome biogenesis." @default.
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- W2561386110 date "2016-01-01" @default.
- W2561386110 modified "2023-10-18" @default.
- W2561386110 title "Sirt1 regulates acrosome biogenesis by modulating autophagic flux during spermiogenesis in mice" @default.
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- W2561386110 doi "https://doi.org/10.1242/dev.147074" @default.
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