黑色素通过抗氧化,代谢和表观遗传途径改善牛胚胎的生产和质量
Hallya Beatriz Sousa Amaral1, Márcia Marques Silveira2,3, Ana Caroline Chaves Vall Nicolás1
1Faculty of Agronomy and Veterinary Medicine, University of Brasilia, Brasilia 70.910-900, DF, Brazil.
Antioxidants (Basel, Switzerland)
|November 27, 2025
概括
在牛胚胎生产期间补充黑素,通过增强发育和线粒体活动,同时减少氧化应激,改善了胚胎质量. 当在体外培养阶段添加黑色素时,观察到最显著的益处.
科学领域:
- 生殖生物学 生殖生物学
- 细胞的新陈代谢
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 牛体内胚胎生产 (IVEP) 对于养牛至关重要.
- 优化IVEP协议可以提高胚胎质量和发育潜力.
- 黑素的抗氧化和代谢特性表明,它在生殖技术方面具有潜在的益处.
研究的目的:
- 调查黑素补充时间对牛IVEP结果的影响.
- 评估黑素对胚胎发育,氧化应激,脂质代谢,线粒体活动,基因表达,DNA甲基化和冷耐受性的影响.
- 为了确定IVEP期间黑激素添加的最佳阶段.
主要方法:
- 建立了四个治疗组:对照组,体外成熟期间的黑色素 (IVM),体外培养期间的黑色素 (IVC) 和IVM和IVC期间的黑色素.
- 评估了胚胎发育,胚胎细胞发育率和发育动力学.
- 评估了氧化应激标志物 (ROS),细胞内脂质含量和线粒体活性.
- 对抗氧化剂和表观遗传酶的基因表达,DNA甲基化模式,亡和冷耐受性进行了分析.
主要成果:
- 黑色素显著改善了囊胚细胞的发育率和发育动力学.
- 补充剂降低了活性氧物种 (ROS) 和细胞内脂质水平.
- 线粒体活动增加,特别是在IVC + Mlt组.
- 黑色素调节了抗氧化剂和表观遗传基因表达,并在重复的DNA区域中诱导了低甲基化.
- 在各组之间的冷耐受性或亡率中没有发现显著差异.
结论:
- 黑色素在IVEP期间对牛胚胎发育和质量产生积极的多因素影响.
- 在体外培养 (IVC) 阶段的补充产生了最显著的改善.
- 黑素影响关键的细胞过程,包括抗氧化剂防御,新陈代谢和表观遗传调节.
- 进一步的研究可能会探索优化黑激素剂量和输送以提高IVEP效率.
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