LSD1通过表观遗传抑制CAMK2β来维持卵细胞质量,以控制颗粒细胞-卵细胞通信
Jixian Zhang1, Yuanyuan Yu1, Zijian Zhu2
1Department of Physiology, College of Basic Medicine, Transformation Engineering Research Center of Chronic Disease Diagnosis and Treatment, Guizhou Medical University, Ankang Road, Guiyang, Guizhou, 550025, China.
Journal of translational medicine
|January 28, 2026
概括
颗粒状细胞 (GCs) 中的LSD1损失通过破坏GC-卵细胞通信来损害卵巢反应. 恢复信号传递或抑制CAMK2β可以治疗卵巢反应不良 (POR).
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.
- 细胞生物学 细胞生物学
背景情况:
- 卵巢反应不良 (POR) 是辅助生殖的一个重大挑战,其分子基础不清楚.
- 在卵泡发育过程中,花质细胞 (GC) -卵细胞通信的表观遗传调节尚未得到充分理解.
研究的目的:
- 调查氨酸特异性脱甲酶1 (LSD1) 在颗粒细胞中的作用及其对卵细胞质量和功能的影响.
- 探索LSD1在GC卵细胞通信中的功能背后的分子机制及其与POR的相关性.
主要方法:
- 在体内研究中生成颗粒素细胞特异的Lsd1淘汰赛小鼠.
- 分析了POR患者和对照组的人类GCs.
- 使用RNA-seq,ChIP-seq,TEM,成像和actin聚合试验进行机械研究.
- 在KGN细胞中使用CRISPR/Cas9进行LSD1淘汰.
主要成果:
- 在POR患者的GC中,LSD1的下调,在小鼠中它的淘汰模仿了POR表型,包括降低生育能力和缺陷卵细胞.
- 由于Lsd1缺乏,Camk2β促进体的H3K4me2增加,对CAMK2β的表达进行上调,破坏平衡,行为动力学和跨区域投射 (TZPs).
- 通过CellChat分析证实了改变的GC-卵细胞信号;恢复平衡或抑制CAMK2β挽救了卵泡发育和卵细胞成熟.
结论:
- GC LSD1在表观遗传学上抑制Camk2β,保持信号传递,动力学和TZP完整性,以便有效的GC-卵细胞通信和卵细胞能力.
- 在GC中,LSD1的下调和CAMK2β的上调是POR的特征,表明潜在的诊断生物标志物和治疗点.
- 抑制CAMK2β为与POR相关的卵巢功能障碍提供了一个有前途的治疗策略.
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