过度表达TET1会影响老化卵巢中的细胞增殖和细胞亡
Qiang Feng1,2, Qirong Li1, Yurui Hu1
1Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, 130062, China.
Journal of assisted reproduction and genetics
|September 24, 2024
概括
卵巢老化与十一转位 (TET) 蛋白水平降低有关,特别是TET1. 在老化的卵巢细胞中过度表达TET1促进细胞增殖并抑制细胞亡,这表明TET1在减轻卵巢衰老中的作用.
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.
- 细胞衰老 细胞衰老
背景情况:
- 预期寿命的增加导致晚婚和生育的趋势.
- 卵巢衰老显著影响女性生育能力和生殖健康.
- 通过十一转位 (TET) 蛋白调节的DNA甲基化模式,在卵巢衰老期间可能会发生变化.
研究的目的:
- 研究TET1在调节卵巢衰老中的作用.
- 了解TET1表达如何影响老化卵巢细胞的增殖和亡.
主要方法:
- 通过免疫光在年轻和老化的小鼠卵巢中分析了5-甲基细胞因子 (5mC) 和5-基甲基细胞因子 (5hmC) 水平.
- 研究了老化卵巢中TET1,TET2和TET3的表达模式.
- 通过使用D-galactosidase (D-gal) 和通过过度表达或siRNA操纵TET1表达来诱导人类卵巢细胞的衰老.
- 在操纵衰老的卵巢细胞中评估了增殖和亡,并在Tet1-knockout小鼠中验证了Tet1表达.
主要成果:
- 老化小鼠的卵巢显示5mC到5hmC过渡,卵细胞成熟和胚胎细胞发育率降低.
- 在老化的卵巢中,TET1,TET2和TET3的表达显著下降,TET1显示出最明显的减少.
- 过度表达TET1增强了D-gal诱导的衰老人类卵巢细胞中的增殖和抑制了细胞亡.
- 在Tet1敲击的小鼠卵巢中,Tet1表达特别低.
结论:
- 在老化的卵巢中,TET家族蛋白质表达,特别是TET1,是下调的.
- 过度表达TET1可以促进卵巢细胞的增殖并抑制老化卵巢细胞的亡,这表明其潜在的治疗作用.
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