模拟微重力在体外对人类二期代谢卵子的影响:基于电子显微镜的研究
Selenia Miglietta1, Loredana Cristiano2, Maria Salomé B Espinola3
1Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University, 00165 Rome, Italy.
Cells
|July 6, 2023
概括
模拟微重力通过改变线粒体和内分泌网膜结构,对人类卵细胞质量产生负面影响,可能会影响受精能力. 这项研究使用微重力模拟器来研究细胞对空间条件的反应.
科学领域:
- 生殖生物学 生殖生物学
- 太空生物学空间生物学
- 细胞超结构 细胞超结构
背景情况:
- 地球的重力会影响生物过程;太空中的微重力会对宇航员造成不良健康影响.
- 观测到微重力对生殖功能的负面影响,包括抑制月经周期和对子细胞和早期胚胎的影响.
- 太空飞行研究的局限性要求在体外研究中使用微重力模拟器.
研究的目的:
- 为了研究模拟微重力的体外效应对人类第二阶段转移细胞的超结构特征.
- 评估重力变化对卵细胞质量和细胞组件的潜在影响.
主要方法:
- 使用随机定位机 (RPM) 模拟微重力条件.
- 进行了传输电子显微镜 (TEM) 分析,对暴露于模拟微重力的人类基因相II卵子进行了分析.
主要成果:
- 微重力暴露改变了线粒体和皮质颗粒的局部,表明细胞骨参与.
- 观测到线粒体和光滑内 плазма网膜 (SER) 形态的变化,形成线粒体 - 囊泡复合体而不是SER聚合物.
- 由于微重力诱导的超结构变化,在卵细胞质量方面存在潜在的妥协.
结论:
- 模拟的微重力通过干扰基本的形态动力学事件,对人类卵细胞质量产生负面影响.
- 微重力可能会破坏细胞骨架,线粒体和内分泌网膜,影响卵细胞实现和保持受精能力的能力.
- 试管微重力模型对于研究细胞对改变重力环境的反应是有价值的.
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