通过对印记控制区域的有针对性的表观遗传编辑产生肥沃的雄激素小鼠
Yanchang Wei1,2, Tao Yue1,2, Yuanyuan Wang1,2
1Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China.
概括
研究人员通过编辑基因组印记,使用两个精子细胞创建了雄激素小鼠. 这一突破表明,通过有针对性的表观遗传改造,哺乳动物的雄性发育是可能的.
科学领域:
- 生殖生物学 生殖生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 哺乳动物发展 哺乳动物发展
背景情况:
- 哺乳动物的繁殖通常需要来自卵细胞和精子的遗传物质.
- 在哺乳动物中,雄性生殖 (仅仅由男性遗传物质的繁殖) 是有限的,主要是由于基因组印记.
- 基因组印记是一种表观遗传机制,导致单基因基因表达,构成了雄性生殖的障碍.
研究的目的:
- 调查仅从男性遗传物质中生产可行的哺乳动物后代的可行性.
- 克服基因组印记的障碍,这些障碍限制了哺乳动物中的雄性生殖.
- 展示表观基因组工程在生殖生物学中的潜力.
主要方法:
- 利用基于CRISPR的表观基因组工程来执行有针对性的DNA甲基化编辑.
- 集中编辑七个关键的印记控制区域 (ICR).
- 将两个精子细胞注射到一个无核卵细胞中,并使用指导RNA进行基因特异性表观遗传编辑.
主要成果:
- 成功地产生了活生生的雌激素基因小鼠,这些小鼠发展到成年.
- 证明特定ICR的向表观遗传改造可以克服印记障碍.
- 展示了基于CRISPR的表观基因组工程在操纵印记的有效性.
结论:
- 哺乳动物的雄性化可以通过精确的表观遗传重编程来实现.
- 针对印记控制区域的有针对性的编辑是一种可行的策略,可以实现雄性生殖.
- 这项研究为了解和操纵哺乳动物生殖开辟了新的途径.
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