线粒体依赖的氧化酸化是肺中膜巨细胞的产后代谢适应的关键
Jun Zhang1, Yu Peng1, Haosen Song1
1Institute of Dermatology and Venereology, Dermatology Hospital, Southern Medical University, Guangzhou 510091, China.
International immunopharmacology
|April 24, 2024
概括
线粒体转录因子A (TFAM) 对于出生后肺膜巨细胞 (AM) 的代谢适应至关重要. 缺少TFAM会损害氧化酸化,导致AM功能障碍和亡.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
背景情况:
- 膜巨细胞 (AMs) 是肺部的重要免疫细胞,起源于胚胎发生过程中,并在周产期成熟.
- 了解AMs的代谢适应对于肺部健康和适应环境因素至关重要.
- 控制AM代谢重编程的精确机制在很大程度上是未知的.
研究的目的:
- 调查线粒体转录因子A (TFAM) 在围产期内膜巨细胞 (AMs) 代谢适应中的作用.
- 阐明TFAM影响AM功能和产后生存的分子机制.
主要方法:
- 在产前和产后阶段对AM能量代谢 (糖解与氧化酸化) 的比较分析.
- 利用Tfam缺乏的小鼠模型来评估TFAM对线粒体功能和AM恒温的影响.
- 调查TFAM缺乏的下游影响,包括内分泌网膜 (ER) 压力,B细胞淋巴瘤2卵巢杀手 (BOK) 积累和 (Ca2+) 信号.
主要成果:
- AM能量代谢从产前的糖解转移到产后的氧化酸化 (OXPHOS),与增加的TFAM表达相吻合.
- 缺少TFAM会损害线粒体的稳定性,减少OXPHOS,并损害AM维护和功能,而不会影响胚胎发育.
- 脱离Tfam会导致线粒体呼吸能力下降,ATP生产减少,ER压力,BOK积累,异常的Ca2+分布,最终导致AM细胞亡.
结论:
- 由TFAM调节的线粒体依赖的OXPHOS对于产后肺部的膜巨细胞的代谢适应至关重要.
- TFAM通过调节线粒体生物能学来维持AM稳态和功能,发挥着至关重要的作用.
- 破坏TFAM介导的OXPHOS会触发细胞应激通路,导致AM损失和潜在的肺免疫功能障碍.
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