在子宫内接触双A和S的环境相关剂量会破坏跨代的生殖细胞编程,由单核多基因组解决
Liang Zhao1,2, Mingxin Shi1, Sarayut Winuthayanon3
1School of Molecular Biosciences, Center for Reproductive Biology, Washington State University, 1770 NE Stadium Way, Pullman, WA, 99164, USA.
bioRxiv : the preprint server for biology
|December 23, 2024
概括
产前暴露于双A (BPA) 和BPS,通过改变生殖细胞表观遗传学,扰乱了老鼠几代的精子数量. 染色体可访问性和基因表达的这些变化至少持续了三代.
科学领域:
- 生殖毒理学 生殖毒理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 内分泌学 在内分泌学.
背景情况:
- 像双A (BPA) 这样的内分泌破坏性化学物质 (EDC) 破坏了几代人的生殖.
- 胚胎细胞表观遗传变化与EDCs引起的跨代生殖缺陷有关.
- 以前的研究表明,BPA/BPS暴露会导致与新生儿精子突变表观遗传变化相关的跨代生殖功能障碍.
研究的目的:
- 系统地阐明由产前BPA和BPS暴露引起的生殖缺陷的跨代遗传机制.
- 分析从F1到F3代的小鼠生殖系中的转录和表观遗传变化.
主要方法:
- 怀孕的小鼠 (F0) 接受了口服的BPA或BPS,剂量不同 (0.5,50,1000微克/公斤/体重/天).
- 在成年男性后代 (F1,F2,F3) 中评估了精子数量和运动性.
- 在F1,F2和F3新生儿生殖细胞 (THY1+) 上进行了单核多组化 (snRNA-seq和snATAC-seq).
主要成果:
- 产前BPA/BPS暴露减少了F1-F3世代的精子数量.
- 新生儿生殖细胞显示基因表达 (DEGs) 和染色质可访问性 (DAPs) 发生变化,特别是涉及精子分化和转录因子 (SP1,SP4,DMRT1).
- 虽然基因表达和可访问性变化在F3下降,但DMRT1基因动机活性在所有代人中仍然较高.
结论:
- 产前BPA/BPS暴露会改变新生儿生殖细胞中的染色质可访问性和转录因子活性,导致基因表达受损.
- 这些表观遗传变化导致持续的生殖障碍,包括精子数量减少,观察到F3代.
- 这项研究提供了一个系统分析,在男性生殖系中暴露于EDC后的跨代表观遗传动力学.
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