S100A8/9-NLRP3介导的慢性未解决的炎症在侵入性肺炎球菌病后引发心脏病理
Sultan Tousif1, Daniel Minassian2, Chao He3
1Department of Cellular Biology and Anatomy, LSUHS, LSU Health Shreveport, Shreveport, LA, USA. tousif.sultan@lsuhs.edu.
Experimental & molecular medicine
|October 10, 2025
概括
肺炎链球菌感染会因未解决的炎症导致长期心脏损伤. 免疫抑制治疗可以预防肺炎后发生的重大心脏不良事件.
科学领域:
- 心脏病学 心脏病学
- 传染性疾病 传染性疾病
- 免疫学 免疫学 免疫学
背景情况:
- 肺炎链球菌 (Spn) 是社区获得性肺炎 (CAP) 的主要原因之一.
- 患有CAP的患者在康复期间面临重大心脏不良事件 (MACE) 和心血管死亡的风险增加.
- 在康复期间Spn诱导的MACE背后的机制尚不清楚.
研究的目的:
- 为了阐明SPN诱导的MACE在康复中的分子机制.
- 为了研究未解决的炎症在SPN介导的心脏病理学中的作用.
- 评估与SPN相关的心脏并发症的潜在免疫抑制干预措施.
主要方法:
- 我们使用了SPN感染和抗生素救援的小鼠模型.
- 进行了心脏功能 (射出分数),分子,生化和组织学分析.
- 进行了侵袭性肺炎球菌病患者的血液分析.
- 测试了使用皮和帕基尼莫德 (S100A9抑制剂) 的干预措施.
主要成果:
- 在抗生素治疗后至少3周观察到喷射分数持续下降.
- 耐久性心脏损伤在分子,生化和组织学层面得到证实.
- 由S100A8/A9-TLR4-NLRP3介导的未解决的炎症被确定为心脏病理的驱动因素.
- 皮和帕基尼莫德治疗挽救了SPN诱导的心脏病理.
结论:
- 脊髓炎感染导致未解决的炎症,导致持续的心脏病理.
- 在康复期间,S100A8/A9-TLR4-NLRP3通路是SPN介导的心脏损伤的核心.
- 免疫抑制干预措施在管理与SPN相关的心脏并发症方面表现有前途.
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