在人类和小鼠中,GADD45A对粒状细胞的分化和卵巢储备至关重要
Juncen Guo1,2,3, Yuanyuan Hu1,2,4, Qi Cao1,2,4
1Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, China.
Journal of cellular and molecular medicine
|September 7, 2025
概括
失调的GADD45A表达有助于减少卵巢储备 (DOR) 通过损害粒状细胞分化和卵泡存活. Gadd45a淘汰赛小鼠模拟了关键的DOR特征,为治疗发现提供了新的途径.
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
- 遗传学 是一个遗传学.
背景情况:
- 卵巢储备减少 (DOR) 是一个重要的生殖健康挑战.
- DNA损伤修复途径越来越多地与DOR病原发生有关.
- 目前尚不清楚DNA修复调节剂GADD45A在DOR中的作用.
研究的目的:
- 调查GADD45A在卵巢储量减少 (DOR) 病原发生中的作用.
- 分析GADD45A在DOR患者和对照者的粒状细胞中的表达.
- 使用体外和体外模型阐明GADD45A对花粉状细胞功能和卵巢储备的功能影响.
主要方法:
- 转录基因组测序,qPCR和西部涂抹来评估GADD45A的表达.
- 在体外研究涉及GADD45A在人类粒状细胞 (KGN) 中的过度表达/抑制.
- Gadd45a淘汰赛 (KO) 鼠的表型特征,包括卵巢储备评估和体外受精 (IVF).
主要成果:
- DOR患者在颗粒细胞 (GCs) 中显著上调GADD45A,FSHR和CYP19A1.1降低.
- GADD45A在GCs中的过度表达破坏了增殖和分化;敲击破坏了分化.
- Gadd45a KO小鼠表现出DOR特征:卵巢周期不规则,卵巢体积减少,荷尔蒙失调,卵泡数量减少.
- 在试管婴儿中,KO卵细胞显示出发育能力受损.
结论:
- GADD45A失调是通过受损的颗粒细胞分化和减少的毛囊存活率对DOR的机制性贡献者.
- Gadd45a KO小鼠作为DOR研究和治疗开发的有效临床前模型.
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