在小鼠卵细胞生长和成熟过程中Scd1基因的动态作用
Huimin Niu1, Xuetong An1, Xinpei Wang1
1Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
International journal of biological macromolecules
|June 14, 2023
概括
基CoA脱酶1 (Scd1) 对于哺乳动物卵细胞的生长和发育至关重要. 它的缺失会损害介质进展,DNA修复和脂肪酸代谢,影响生殖能力.
科学领域:
- 生殖生物学 生殖生物学
- 分子内分泌学分子内分泌学
- 发展生物学 发展生物学
背景情况:
- 哺乳动物的繁殖依赖于复杂的调节网络,包括脂肪酸代谢,用于卵细胞的发育.
- 甲基CoA脱酶1 (Scd1) 在早期 oogenesis 的精确作用仍然在很大程度上未被阐明.
- 众所周知,scd1基因表达在产卵过程中会增加,从而支持卵细胞的生长.
研究的目的:
- 为了研究Scd1在哺乳动物 oogenesis 的功能.
- 阐明Scd1影响卵细胞生长,分化和介质进展的分子机制.
- 分析Scd1缺乏对脂肪酸代谢和发育中的卵细胞脂质含量的影响.
主要方法:
- 使用基因编辑的小鼠缺少Stearoyl-CoA脱酶1基因 (Scd1-/-).
- 在野生型和Scd1-/-小鼠的围产卵子中对基因表达进行了比较分析.
- 评估了介质进展,DNA损伤和修复,脂肪酸代谢基因表达和脂质滴滴含量.
主要成果:
- 在Scd1缺陷中失调了与半变相关的关键基因 (Sycp1, Sycp2, Sycp3, Rad51, Ddx4) 和卵细胞生长/分化基因 (Nobox, Lhx8, Bmp15, Ybx2, Dppa3, Oct4, Sohlh1, Zp3).
- 缺少Scd1导致中介性进展受损,DNA损伤增加,并抑制卵细胞中的DNA修复.
- 缺少scd1破坏了脂肪酸代谢基因表达 (fasn,srebp1,acaca) 并降低了脂质滴滴含量,显著降低了卵细胞成熟率.
结论:
- 基CoA脱酶1 (Scd1) 在调节脂肪酸代谢网络中发挥着关键的多功能作用,这对于卵细胞的维持和分化至关重要.
- 在早期的卵泡发生过程中,Scd1对于适当的介质进展,DNA完整性和整体卵细胞发育是不可或缺的.
- 这些发现强调Scd1是通过支持卵细胞中关键的代谢和发育过程来确保女性生殖能力的关键因素.
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