通过调节Treg细胞,sRAGE通过抑制心肌缺血/反损伤来抑制心肌缺血/反损伤
Jian Liu1, Jie Zhang1, Jing Chang2
1Cardiovascular Center, Beijing Tongren Hospital, Capital Medical University, No.1 Dongjiaomin Lane, Dongcheng District, Beijing, 100730, People's Republic of China.
Cell & bioscience
|October 23, 2025
概括
高级糖化终产品溶解受体 (sRAGE) 通过增加调节性T细胞 (Tregs) 来保护心脏损伤. 这涉及JAK2 / STAT3-PD-L1通路,突出了肌肉心脏缺血症/再输液损伤的新型治疗标.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 分子医学是分子医学.
背景情况:
- 调节性T细胞 (Tregs) 积聚在受损的心脏组织中,在心肌缺血/再生 (I/R) 损伤期间减轻炎症.
- 高级糖化最终产品的可溶性受体 (sRAGE) 通过抑制炎症来减少心肌I/R损伤,这表明Tregs.有作用.
研究的目的:
- 调查Tregs在sRAGE对心肌I/R损伤的保护作用中的作用.
- 阐明sRAGE在I/R损伤的背景下影响Treg分化和功能的分子机制.
主要方法:
- 使用心肌细胞特异性sRAGE敲进小鼠和培养心肌细胞的肌肉心脏I / R损伤模型.
- 通过西式涂抹,免疫组织化学和流细胞测量来分析分子机制.
- 在sRAGE转基因小鼠中评估心脏功能,纤维化和炎症,有和没有Treg枯竭.
主要成果:
- sRAGE过度表达显著增加了心肌组织中的Treg数量.
- 消耗Tregs取消了sRAGE对I/R诱导的心脏功能障碍,纤维化和炎症的保护作用.
- sRAGE 增强了 JAK2/STAT3 信号通路,提高了 PD-L1 表达的调节,并促进了 CD4+ T 细胞分化为 Tregs.
结论:
- sRAGE 能够保护心肌的 I/R 损伤.
- 这种保护通过通过JAK2/STAT3-PD-L1信号通路调节Treg分化来实现.
- 针对sRAGE-Treg轴为心肌I/R损伤提供了一个潜在的治疗策略.
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