卵母细胞
DNA甲基化
细胞生物学
甲基化
表观遗传学
生物
母子转换
线粒体DNA
重编程
基因组印记
基因表达
男科
线粒体
合子
基因
胚胎
遗传学
胚胎发生
医学
作者
Ning‐hua Mei,Shimeng Guo,Qi Zhou,Yiran Zhang,Xiaozhao Liu,Ying Yin,Ximiao He,Jing Yang,Tailang Yin,Liquan Zhou
标识
DOI:10.1002/advs.202204794
摘要
Abstract Significantly decreased H3K4 methylation in oocytes from aged mice indicates the important roles of H3K4 methylation in female reproduction. However, how H3K4 methylation regulates oocyte development remains largely unexplored. In this study, it is demonstrated that oocyte‐specific expression of dominant negative mutant H3.3‐K4M led to a decrease of the level of H3K4 methylation in mouse oocytes, resulting in reduced transcriptional activity and increased DNA methylation in oocytes, disturbed oocyte developmental potency, and fertility of female mice. The impaired expression of genes regulating mitochondrial functions in H3.3‐K4M oocytes, accompanied by mitochondrial abnormalities, is further noticed. Moreover, early embryos from H3.3‐K4M oocytes show developmental arrest and reduced zygotic genome activation. Collectively, these results show that H3K4 methylation in oocytes is critical to orchestrating gene expression profile, driving the oocyte developmental program, and ensuring oocyte quality. This study also improves understanding of how histone modifications regulate organelle dynamics in oocytes.
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