康尼辛43调节细胞间的线粒体从人体介质细胞转移到体细胞的转移
Rebecca M Irwin1, Matthew A Thomas1, Megan J Fahey1
1Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.
Stem cell research & therapy
|October 10, 2024
概括
介酶体 stromal 细胞 (MSCs) 将线粒体转移到软体细胞,特别是在氧化应激下. 康涅素43 (Cx43) 和其异型GJA1-20k调解了这种转移,为骨关节炎再生疗法提供了潜力.
科学领域:
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
- 生物化学 生物化学
背景情况:
- 介质细胞 stromal 细胞 (MSCs) 显示出组织修复和治疗退行性疾病如关节骨炎 (OA) 的希望.
- 已经观察到细胞间线粒体从MSC转移到软体细胞,但潜在的机制仍然不清楚.
- 连接素43 (Cx43) 和其截断的异型GJA1-20k与其他细胞类型的线粒体转移有关,并在这里研究了骨科组织.
研究的目的:
- 调查Cx43在调解线粒体从MSC转移到软体细胞中的作用.
- 为了确定氧化应激是否增强了MSC-to-chondrocyte线粒体转移.
- 测试MSC Cx43表达是否是转移过程中的关键因素.
主要方法:
- 氧化应激在使用 tert-Butyl 氧化物 (t-BHP) 的冠状细胞中被诱导.
- 经过基因改造,MSC可以表达光线粒体并改变Cx43水平 (敲击或过度表达).
- 用流细胞计和共聚焦显微镜分析了MSC-chondrocyte共同培养的线粒体转移,检查了细胞与细胞的接触和Cx43定位.
主要成果:
- 线粒体转移在氧化应激下和在直接细胞与细胞接触的共同培养下,在线粒体转移在氧化应激下和在直接细胞与细胞接触的共同培养下显著更高.
- 细胞与细胞接触点的Cx43染色得到了丰富,特别是在含有线粒体的MSCs的富含actin的扩展中.
- 击败Cx43减少了线粒体转移,而Cx43过度表达增加了它;GJA1-20k表达与转移发生率有很强的相关性.
结论:
- 线粒体从MSC转移到状细胞是由氧化应激增强的,由Cx43.3介导.
- Cx43的GJA1-20k异型在这种细胞间线粒体转移中发挥着重要作用.
- GJA1-20k代表了一种潜在的治疗标,用于增强基于MSC的软骨修复再生策略.
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