通过通过NF-κB/STAT1信号抑制M1巨,ACE2可以缓解败血症引起的心肌病
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Xue Xiao1, Jia-Xin Li1, Hui-Hua Li2
1Department of Emergency Medicine, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Worker's Stadium South Roud, Beijing, 100020, China.
Cell biology and toxicology
|September 25, 2024
概括
ангиотензин转化酶2 (ACE2) 通过激活Ang (1-7) -Mas受体轴来保护抗败血症诱导的心肌病. 这一途径抑制了M1巨细胞的两极分化,减少了心脏功能障碍,提高了败血症的存活率.
科学领域:
- 心血管科学 心血管科学
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
背景情况:
- 氨酸-血管酶系统 (RAS) 在心血管健康中发挥作用.
- ангиотензин转化酶2 (ACE2) 将 ангиотензинII代谢为Ang (1-7),产生保护作用.
- 在败血症引起的心肌病 (SIC) 中ACE2的作用尚不清楚.
研究的目的:
- 研究ACE2在败血症诱导心肌病 (SIC) 中的作用.
- 阐明ACE2在败血症中的作用的潜在机制.
- 评估ACE2作为SIC的潜在治疗点.
主要方法:
- 在小鼠中,以诱导败血症的Cecal Ligation and Puncture (CLP) 模型.
- ACE2敲击和淘汰赛小鼠模型.
- 骨髓细胞的收养转移和体外细胞实验.
- 对心脏功能,生存率和分子信号通路 (NF-κB,STAT1) 的评估.
- 马斯受体抗剂 (A779) 的使用.
主要成果:
- 结合性脑膜外科手术损害了心脏功能,并破坏了ACE2-Ang (1-7) / ACE-Ang II平衡.
- ACE2敲击改善了心脏功能和存活率,而ACE2敲击恶化了结果.
- 骨髓体ACE2减轻了氧化应激,炎症,M1巨细胞两极分化和心肌细胞亡.
- 这些有益效应依赖于Ang (1-7) -Mas受体 (MasR) 轴,并被A779.9阻止.
- ACE2激活通过NF-κB和STAT1信号通路抑制了M1巨细胞的两极分化.
结论:
- 通过激活Ang (1-7) -Mas受体轴,ACE2可以缓解败血症诱导的心肌病 (SIC).
- ACE2通过通过NF-κB和STAT1通路抑制M1巨细胞极化来发挥其保护作用.
- ACE2代表了对治疗败血症和SIC的有前途的治疗标.
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