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寒冷冲击蛋白B作为DMSO的替代品,用于卵细胞玻璃化
Xinhai Wang1,2,3,4, Jing Guo1,2,3,4, Kaiyan Zhang1,2,3
1Key Laboratory of the Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun 130117, China.
Antioxidants (Basel, Switzerland)
|January 28, 2026
概括
冷震蛋白B (CspB蛋白) 在卵细胞玻璃化过程中有效地取代有毒的二甲基硫氧化物 (DMSO). CspB蛋白抑制冰的形成,改善卵细胞的存活率和生殖生物技术的发展潜力.
科学领域:
- 生殖生物学 生殖生物学
- 低温生物学 低温生物学
- 生物化学 生化学
背景情况:
- 甲基二硫氧化物 (DMSO) 是用于卵细胞玻璃化的一种常见的冷保护剂,但会引起毒性.
- DMSO的度依赖性毒性可能会损害卵细胞的发育潜力.
- 在卵子冷保存中需要更安全的DMSO替代品.
研究的目的:
- 研究冷冲击蛋白B (CspB蛋白) 在卵细胞玻璃化中作为DMSO替代物的潜力.
- 评估CspB蛋白在防止冰结晶和改善卵细胞存活和发育能力方面的有效性.
- 阐明CspB蛋白的冷保护作用背后的分子机制.
主要方法:
- 分子动力学模拟以评估CspB蛋白与冰的相互作用.
- 实验验证CspB蛋白表达,结合瘤,以及冰抑制.
- 使用CspB蛋白补充溶液进行卵细胞玻璃化,并评估解后的存活率,发育率,氧化应激,线粒体功能和亡.
- 转录组分析以确定CspB蛋白质介导的信号通路.
主要成果:
- 通过稳定冰水界面,CspB蛋白有效抑制冰的结晶和再结晶.
- 使用CspB蛋白 (1-2 mg/mL) 的玻璃化溶液显著减少或取代DMSO,改善小鼠和牛卵细胞存活率.
- 用优化的CspB蛋白配方 (15%乙烯糖醇+2毫克/毫升CspB) 进行玻璃化卵子显示出与用DMSO处理的卵子可比的发育能力.
- CspB蛋白的冷保护机制涉及调节mTOR信号通路,调节氧化应激,线粒体功能和亡.
结论:
- 在卵细胞玻璃化中,CspB蛋白作为DMSO的有效,无毒替代品.
- 这种基于蛋白质的冷保护策略提高了卵细胞的存活率和发育潜力.
- CspB蛋白的机制涉及直接的冰抑制和mTOR介导的细胞应激反应的调节.
- 这种方法为跨物种的生殖生物技术提供了有希望的进步.
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