在内心细胞中,GPAT4维持了内质网膜恒常性,并保护了心脏发育
Tianyang Zhao1, Kuipei Jin2,3, Xiaodong Wang1
1State Key Laboratory of Pharmaceutical Biotechnology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, and Jiangsu Key Laboratory of Molecular Medicine, Nanjing University Medical School, Nanjing, China.
Nature communications
|April 8, 2025
概括
甘-3-酸盐乙转移酶4 (GPAT4) 对于心脏发育至关重要,因为它通过维持内分泌网膜 (ER) 恒常性来维持心脏发育. 它的缺失会引发压力反应和线粒体问题,影响心脏器官生成.
科学领域:
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
背景情况:
- 内心对心肌发育至关重要,了解其调节是治疗心肌病的关键.
- 甘-3-酸盐转酶4 (GPAT4),一种ER定蛋白,已在甘脂生物合成中发挥作用,但其ER功能不太了解.
研究的目的:
- 研究GPAT4在内脏和心脏发育中的作用.
- 阐明将GPAT4缺乏与心脏缺陷联系起来的分子机制.
主要方法:
- 生产Gpat4全球和组织特异性淘汰小鼠.
- 分析内质网膜 (ER) 压力,ER-线粒体通信和线粒体DNA (mtDNA) 释放.
- 对cGAS-STING通路激活和I型干扰素反应的评估.
- 通过取消cGAS-STING路径来评估救援策略.
主要成果:
- 在小鼠中,GPAT4缺乏导致内心ER压力,并增加了ER-线粒体通信.
- 这种干扰导致线粒体DNA (mtDNA) 逃逸,激活cGAS-STING通路和I型干扰素反应.
- 激活的途径会对心脏发育产生负面影响.
结论:
- 在内心和心脏发育过程中,GPAT4对于维持ER平衡至关重要.
- cGAS-STING通路在心脏器官生成中发挥着关键作用,并与GPAT4缺陷心脏缺陷有关.
- 针对cGAS-STING通路可以拯救由GPAT4删除引起的心脏异常.
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