阿尔法谷氨酸 (AKG) 在体外成熟过程中对卵细胞复合体的剂量依赖的双重作用
Yunjie Liu1, Xin Xiao1, Likai Wang1
1State Key Laboratory of Animal Biotech Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agricultural, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, No. 2 Yuanmingyuan West road, Beijing, 100193, China.
Cell communication and signaling : CCS
|October 4, 2024
概括
阿尔法谷氨酸 (AKG) 对卵子细胞的体外成熟 (IVM) 具有双重影响. 低度 (30微米) 提高卵细胞质量和胚胎发育,而高度 (750微米) 是有害的.
科学领域:
- 生殖生物学 生殖生物学
- 细胞生理学 细胞生理学
- 生物化学 生物化学
背景情况:
- 试管成熟 (IVM) 对于辅助生殖技术至关重要.
- 积卵细胞复合体 (COCs) 对于卵细胞的发育和成熟至关重要.
- 阿尔法谷氨酸 (AKG) 是一种关键的代谢中间体,在细胞功能中具有潜在的作用.
研究的目的:
- 为了研究阿尔法谷氨酸 (AKG) 在IVM期间对COCs的剂量依赖作用.
- 阐明AKG对卵细胞质量和胚胎发育的影响的潜在机制.
- 确定AKG的最佳度,以获得成功的IVM.
主要方法:
- 在试验室中培养了COC,其AKG度各不相同 (30微米和750微米).
- 评估累积膨胀,卵细胞质量和胚胎发育率.
- 在COC中评估反应性氧物种 (ROS) 水平,谷氨 (GSH) 和NADPH.
- 分析了线粒体功能,包括线粒体复合体1的基因表达,膜潜力和ATP生产.
- 研究了增长差异化因素9 (GDF9) 在调解AKG效应中的作用.
主要成果:
- 30μM的AKG度显著改善了积分膨胀,卵细胞质量和胚胎发育.
- 低AKG度降低了ROS,保留了GSH和NADPH,增强了线粒体功能,并保持了氧化还原平衡.
- 高AKG度 (750μM) 抑制了累积膨胀和降低了卵细胞质量.
- 补充GDF9拯救了高AKG度的不良影响,突出了GDF9的关键作用.
结论:
- AKG在COC的IVM上表现出剂量依赖的双重效应.
- 优化的AKG度 (30μM) 通过减轻氧化应激和增强线粒体功能来支持卵细胞成熟.
- 高的AKG度对IVM有害,GDF9在调节累积膨胀方面发挥着关键作用.
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