由于NR4A1缺乏,它通过向Bcat1来激活综合应激反应,从而促进喉斑块的脆弱性
Long Chen1, Yiping Shi1, Danrui Xiao1
1Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
Cellular and molecular life sciences : CMLS
|February 22, 2025
概括
核受体NR4A1缺陷通过Bcat1.1激活综合应激反应 (ISR),使脆弱斑块恶化. 针对这个NR4A1/Bcat1/ISR轴稳定动脉样硬化斑块,为预防中风提供新的治疗策略.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 动脉样硬化研究 动脉样硬化研究
背景情况:
- 易受伤害的动脉斑块破裂是缺血性中风的主要原因之一.
- 从稳定板块转变为脆弱板块的机制尚不清楚.
- 核受体NR4A1在炎症性疾病中起作用.
研究的目的:
- 研究NR4A1在脆弱动脉样硬化斑块形成中的作用.
- 阐明将NR4A1与斑块脆弱性联系起来的分子机制.
主要方法:
- 使用ApoE-/-和ApoE-/-;NR4A1-/-小鼠生成了一个易受损伤的斑块小鼠模型.
- 评估斑块病理,包括出血,破裂和炎症.
- 研究了NR4A1/Bcat1相互作用及其对巨细胞综合应激反应 (ISR) 的影响.
主要成果:
- 缺少NR4A1显著恶化了易受损伤的斑块病理,增加了出血和破裂.
- NR4A1 缺乏加剧了巨细胞的透,炎症和氧化应激.
- 发现NR4A1通过转录抑制Bcat1,调节巨细胞中的ISR.
结论:
- 由于NR4A1缺乏,它通过抑制Bcat1激活ISR,从而促进易受损伤的斑块进展.
- 抑制ISR或Bcat1,或使用Celastrol,改善了斑块形成和增加了稳定性.
- NR4A1/Bcat1/ISR轴代表了稳定动脉样硬化斑块的潜在治疗标.
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