阿波利波蛋白A1缺乏会增加巨细胞亡和动脉硬化斑块中的死核发育,以Bim-依赖的方式
Alexander S Qian1, George E G Kluck1, Pei Yu1
1Thrombosis and Atherosclerosis Research Institute, Centre for Metabolism, Obesity and Diabetes Research, and Department of Biochemistry and Biomedical Sciences, McMaster University and, Hamilton Health Sciences, Hamilton, Ontario, Canada.
Journal of lipid research
|March 22, 2025
概括
阿波利波蛋白A1 (ApoA1) 缺乏会通过Bim蛋白促进巨细胞亡和动脉样硬化斑块的生长. 抑制Bim可以降低ApoA1缺乏的小鼠中死核的发育.
科学领域:
- 心血管生物学 心血管生物学
- 动脉样硬化研究 动脉样硬化研究
- 巨细胞的亡 巨细胞的亡
背景情况:
- 晚期动脉样硬化病变中的巨细胞亡驱动了斑块的进展和死核的形成.
- 预的蛋白质Bim在内细胞网膜应激下调解巨细胞亡.
- 高密度脂蛋白 (HDL) 抑制了ER压力诱导的巨细胞亡.
研究的目的:
- 调查阿波利波蛋白A1 (ApoA1) 缺乏对死核生长和斑块亡的影响.
- 为了确定Bim的删除是否减轻了ApoA1缺乏引起的斑块进展.
主要方法:
- 在低密度脂蛋白受体 (LDLR) 淘汰小鼠中引入了ApoA1缺乏.
- 在10周的时间里,小鼠被食高脂肪饮食.
- 从Bim缺乏或骨髓特异性Bim删除的小鼠进行了骨髓移植.
主要成果:
- ApoA1 缺乏导致了带有大型死核核的高级斑块,并增加了巨细胞亡和Bim表达.
- 在骨髓细胞中抑制Bim减少了ApoA1/LDLR双KO小鼠的斑块亡,死核和斑块大小.
- 在ApoA1/LDLR双KO小鼠中,骨髓细胞特异性Bim删除也减少了细胞亡和斑块大小,没有副作用.
结论:
- ApoA1 缺陷通过一个依赖Bim的途径促进髓状细胞亡.
- 这种Bim介导的亡显著促进了死核的发展和动脉样硬化斑块的进展.
- 向Bim可能为治疗动脉样硬化提供治疗策略.
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