低氧微环境对培养中的精子干细胞的影响
A S Gille1,2,3,4, M Givelet1,2,3,4, D Pehlic1,2
1Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France.
Frontiers in cell and developmental biology
|February 2, 2024
概括
缺氧对精子干细胞 (SSC) 产生负面影响,损害了它们的增殖和分化. 即使是轻微的缺氧也会影响SSC殖民地形成和繁殖,严重的条件证明是有害的.
科学领域:
- 生殖生物学 生殖生物学
- 干细胞研究的研究.
- 细胞生理学 细胞生理学
背景情况:
- 干细胞利基对于干细胞命运决定至关重要.
- 氧 (O2) 张力是丸干细胞利基的潜在关键组成部分.
研究的目的:
- 研究不同低氧条件对小鼠和人类精子干细胞 (SSCs) 的影响.
- 了解氧气水平在SSC自我更新和分化中的作用.
主要方法:
- 在不同氧张力 (21%,3.5%,1%和0.1%O2) 下培养小鼠和人类的SSC.
- 评估SSC的增殖,殖民地形成,分化偏差,线粒体质量,线粒体膜潜力和活性氧物种 (ROS) 的产生.
- 评估HIF-1α和HIF-2α转录因子的参与.
主要成果:
- 严重的缺氧 (≤1% O2) 有害地影响了小鼠SSCs形成生殖细胞集群和繁殖的能力.
- 低氧导致1%和0.1%O2.1%的轻微差异偏差.
- 线粒体ROS生成增加了3.5%和1%的O2.2.
- 3.5%的缺氧并没有改善人类的SSC维护或传播.
- HIF-1α和HIF-2α没有参与SSC对缺氧的自主反应.
结论:
- 缺氧,特别是严重水平,会对SSC功能产生负面影响,包括繁殖和殖民地形成.
- 氧气张力是维护SSC活力和功能在体外的关键因素.
- 在SSC中对缺氧的反应似乎不是由HIF-1α或HIF-2α介导的.
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