IP3R-1通过调节MAM形成和线粒体功能,使小鼠的内毒素诱导的急性肺损伤恶化
Shuan Dong1, Ya Wu1, Yuan Zhang1
1Department of Anesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin 300100, China.
Experimental biology and medicine (Maywood, N.J.)
|December 30, 2023
概括
内毒素诱导的急性肺损伤 (ALI) 涉及线粒体功能障碍. 这项研究揭示,因诺-1,4,5-三酸盐受体1型 (IP3R-1) 对ALI中线粒体相关的内质网膜 (MAM) 形成和细胞损伤产生了关键影响.
科学领域:
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
- 呼吸系统医学 呼吸系统医学
背景情况:
- 由内毒素引起的急性肺损伤 (ALI) 是一个关键的临床问题.
- 线粒体关联的细胞内网膜 (MAM) 对于细胞平衡至关重要.
- 1型伊诺西-1,4,5-三酸盐受体 (IP3R-1) 在MAM中调节 (Ca2+) 运输.
研究的目的:
- 调查IP3R-1和MAM在内毒素诱导的ALI中的作用.
- 了解ALI中IP3R-1,MAM和线粒体功能障碍之间的联系机制.
主要方法:
- 在小鼠和MLE-12细胞中注射脂聚糖 (LPS).
- 在BALF和血清中分析炎症组分 (IL-6,TNF-α,MDA).
- 在肺组织中评估线粒体形态,MAM形成和呼吸控制比率 (RCR).
- 测量线粒体Ca2+吸收,反应性氧物种 (ROS) 生产以及MLE-12细胞中的MAM形成.
- 在MLE-12细胞中进行IP3R-1淘汰.
主要成果:
- 随着LPS治疗增加了IL-6,TNF-α和MDA水平.
- 暴露于LPS的小鼠显示线粒体大小增加,MAM形成升高,RCR减少.
- 在接受LPS治疗的小鼠的肺组织和MAM中,IP3R-1表达被上调.
- 在LPS治疗的MLE-12细胞中,线粒体Ca2+吸收,ROS产生和MAM形成都增加了.
- 击败IP3R-1部分扭转了这些LPS诱导的MLE-12细胞的变化.
结论:
- 在ALI期间,IP3R-1在MAM形成和线粒体功能障碍中发挥着至关重要的作用.
- 针对IP3R-1可能为内毒素诱导的ALI提供一种新的治疗策略.
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