Depletion of oocyte dynamin-related protein 1 shows maternal-effect abnormalities in embryonic development.

Depletion of oocyte dynamin-related protein 1 shows maternal-effect abnormalities in embryonic development.
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卵母细胞动力蛋白相关蛋白1的缺失显示胚胎发育中的母体效应异常。

DOI:
10.1126/sciadv.abl8070
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发表时间:
2022-06-17
期刊:
影响因子:
13.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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卵子含有大约20万个线粒体,产生三磷酸腺苷和卵母细胞发育所必需的代谢物。线粒体还通过调节表观遗传修饰剂的代谢物整合代谢和转录,但没有直接证据将卵母细胞线粒体功能与母体表观基因组和随后的胚胎发育联系起来。在这里,我们通过删除线粒体分裂因子Drp1破坏了卵母细胞线粒体功能。分裂缺陷的卵母细胞在胚胎移植和植入后发育中表现出高频率的失败。这与线粒体功能改变、卵母细胞转录组和蛋白质组改变、皮质下母体复合物改变以及卵母细胞DNA甲基化和H3K27me3减少有关。将受精的Drp1基因敲除卵母细胞的原核移植到正常卵质中不能挽救胚胎死亡率。我们的结论是,线粒体功能在建立母体表观基因组中发挥作用,对胚胎发育产生严重后果。卵子发生过程中线粒体的动态变化通过调控母体表观基因组影响胚胎发育。
Eggs contain about 200,000 mitochondria that generate adenosine triphosphate and metabolites essential for oocyte development. Mitochondria also integrate metabolism and transcription via metabolites that regulate epigenetic modifiers, but there is no direct evidence linking oocyte mitochondrial function to the maternal epigenome and subsequent embryo development. Here, we have disrupted oocyte mitochondrial function via deletion of the mitochondrial fission factor Drp1. Fission-deficient oocytes exhibit a high frequency of failure in peri- and postimplantation development. This is associated with altered mitochondrial function, changes in the oocyte transcriptome and proteome, altered subcortical maternal complex, and a decrease in oocyte DNA methylation and H3K27me3. Transplanting pronuclei of fertilized Drp1 knockout oocytes to normal ooplasm fails to rescue embryonic lethality. We conclude that mitochondrial function plays a role in establishing the maternal epigenome, with serious consequences for embryo development. Mitochondrial dynamics during oogenesis affects embryo development by regulating the maternal epigenome.
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