胚胎操纵中的精细化应用到牲畜中的CRISPR技术
P C Dos Santos-Neto1, F Cuadro1, M Souza-Neves2
1Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay.
Theriogenology
|June 17, 2023
概括
在羊肉中注入CRISPR/Cas微注射显示了20%的囊胞发育率. 将早期胚胎转移到子宫角与卵管转移一样有效,而玻璃化保持了编辑胚胎的高怀孕和出生率.
科学领域:
- 生殖生物学 生殖生物学
- 遗传学 是一个遗传学.
- 动物科学动物科学
背景情况:
- 在大型动物中实施CRISPR技术需要改进胚胎操纵和转移以实现商业可行性.
- 绵羊是大型动物基因组编辑研究的关键模型.
研究的目的:
- 为了评估CRISPR/Cas的发育能力,在体外微微注射了绵羊的卵胞.
- 为了比较早期胚胎转移到卵管和子宫角后的怀孕结果.
- 为了评估胚胎存活率和出生率后玻璃化和加热CRISPR/Cas微注射的胚胎.
主要方法:
- 在CRISPR/Cas微注射后对体外产生的胚胎发育率的回顾性分析.
- 早期 (2-8 细胞) 胚胎转移到同步接收母羊的卵管或子宫角.
- 玻璃化/加热 (克里奥托普方法) 的CRISPR/Cas微注射胚芽细胞,然后进行子宫角移植.
主要成果:
- 微注射CRISPR/Cas的阴囊细胞的发育率为20.0%,低于未注射的对照 (44.9%).
- 怀孕,胚胎存活率和出生率在第二天胚胎的卵管和子宫角移植之间没有显著差异.
- 玻璃化CRISPR/Cas微注射胚胎的怀孕,存活率和出生率与新鲜胚胎相似.
结论:
- 在羊群中使用CRISPR/Cas微注射可以实现可行的发育速度,尽管发育速度降低了.
- 早期胚胎的子宫角移植简化了程序,而不会影响结果.
- 玻璃化是保存CRISPR/Cas微注射绵羊胚胎的一个有前途的方法,支持家畜的基因组编辑应用.
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