埃奇诺科克细粒菌B抗原通过促进M2巨细胞两极分化来改善心肌梗塞
Weixiao Zhang1,2, Bingxin Liu3, Sai Wang1,2
1First Affiliated Hospital of Bengbu Medical University, Bengbu, China.
Frontiers in cellular and infection microbiology
|November 19, 2025
概括
再组合的 Echinococcus granulosus抗原B亚单元2 (rEgAgB8/2) 在心肌梗塞 (MI) 鼠标模型中显著改善了存活率和心脏功能. 这种治疗通过促进有益的M2巨细胞两极分化来减少炎症.
科学领域:
- 心血管研究研究心血管研究
- 免疫学 免疫学 免疫学
- 寄生虫学的寄生虫学
背景情况:
- 心肌梗塞 (MI) 是一种危及生命的心血管疾病,其特征是心肌缩.
- 埃奇诺科克细粒菌抗原B (EgAgB) 调节宿主免疫反应.
- EgAgB亚单元8 (EgAgB8/2) 在缓解MI诱导的炎症中的作用需要研究.
研究的目的:
- 在心肌梗塞 (MI) 的小鼠模型中研究重组EgAgB8/2 (rEgAgB8/2) 的治疗潜力.
- 阐明rEgAgB8/2对巨细胞两极分化和MI后炎症的影响背后的免疫机制.
主要方法:
- 在雄性C57BL/6J小鼠中,通过绑定左前下降冠状动脉 (LAD) 来诱导心肌梗塞.
- 小鼠接受了rEgAgB8/2的腹腔内给药,以评估治疗效果和免疫机制.
- 通过测量M1 (iNOS) 和M2 (Arg-1) 标记物,使用RT-qPCR和流细胞计 (CD86+,CD206+) 来评估巨细胞极化.
- 量化了炎症标志物 (TNF-α,IL-1β,NLRP3,caspase-1) 和调控性细胞因子 (IL-10,TGF-β) 的数量.
主要成果:
- 在28天内,rEgAgB8/2治疗显著改善了心脏功能,并使MI小鼠的存活率从66.7%提高到94.4%.
- 促炎性细胞因子 (TNF-α,IL-1β) 减少,而调节性细胞因子 (IL-10,TGF-β) 在心脏病发作的组织和血清中增加.
- rEgAgB8/2促进了M2巨细胞的两极分化 (增加Arg-1,CD206+) 和减少了M1标记物 (iNOS,CD86+).
- 在rEgAgB8/2治疗组中观察到NLRP3/caspase-1/IL-1β信号通路的抑制.
结论:
- rEgAgB8/2在小鼠模型中显示出对心肌梗塞的显著治疗潜力.
- 该机制涉及促进M2巨细胞两极分化,并抑制NLRP3/caspase-1/IL-1β通路.
- rEgAgB8/2可以作为治疗心脏病发作和其他炎症相关疾病的新疗法.
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