低毒性压力诱导介质干细胞的补充介导溶解,通过降低调节因子H和CD59来调节
Ramada R Khaswaneh1, Ejlal Abu-El-Rub2, Ayman Alzu'bi1
1Department of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid, 211-63, Jordan.
Tissue engineering and regenerative medicine
|November 1, 2024
概括
严重的缺氧会通过降低H因子和CD59减少中介干细胞 (MSC) 存活率,从而导致补充介导损伤. 维持这些因素对于MSC在低氧环境中保持和生存至关重要.
科学领域:
- 补充系统生物学
- 干细胞生物学 干细胞生物学
- 缺氧的研究研究缺氧.
背景情况:
- H因子和CD59是重要的补充调节剂.
- 介酶干细胞 (MSC) 使用这些因素进行自我保护.
- 严重的缺氧会影响MSC的存活率,但其对补体调节的影响尚不清楚.
研究的目的:
- 调查严重缺氧对MSCs补充级联调节的影响.
- 了解缺氧如何影响MSC中的H因子和CD59的作用.
- 为了确定缺氧诱导的补体变化对MSC存活率的影响.
主要方法:
- 人类脂肪衍生的MSCs (hAD-MSCs) 暴露于严重的缺氧 (400μM CoCl2).
- PI3K (存活) 和Caspase-3 (亡) 的蛋白质表达通过西式斑点分析.
- 补充因子 (H因子,CD59,C3b,iC3b,C5b,C9) 和MAC的水平使用ELISA,西方斑点和免疫细胞化学进行了评估.
主要成果:
- 严重的缺氧显著降低了MSC中的H因子分泌和CD59表达.
- 缺氧导致膜攻击复合体 (MAC) 的形成增加.
- 对PI3K的下调和对Annexin V和Caspase-3的上调表明细胞溶解和细胞亡的增加.
结论:
- 缺氧下H因子和CD59的损失会通过MAC激活触发MSC溶解和亡.
- 维持H因子和CD59水平对于增强MSC保留和在低氧条件下生存至关重要.
- 这一发现对低氧环境中基于干细胞的疗法具有重大临床意义.
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