肠道微生物的共代谢物2-甲基甲基卡尼丁通过与整合素α2β1结合和激活而加剧血栓形成
1Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, China; Nanhai Translational Innovation Center of Precision Immunology, Sun Yat-Sen Memorial Hospital, Foshan, Guangdong 528200, China; Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, China; National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, China.
一种新发现的代谢物,二甲基丁二甲基 (2MBC),通过增强血小板激活来促进血栓形成. 肠道微生物群对2MBC水平有影响,这表明失生症和心血管事件之间存在联系.
科学领域:
- 心血管科学 心血管科学
- 代谢学 代谢学 代谢学
- 微生物组研究 微生物组研究
背景情况:
- 血栓形成是导致死亡和残疾的主要原因,通常与COVID-19和代谢障碍等疾病有关.
- 导致这些疾病中血栓形成风险增加的确切机制尚未完全理解.
- 识别新的分子通路对于开发有效的抗血栓形成策略至关重要.
研究的目的:
- 为了研究二甲基丁二甲基 (2MBC) 在血栓形成中的作用.
- 阐明2MBC影响血小板功能和血栓形成的分子机制.
- 探索肠道微生物群对2MBC积累及其促血栓效应的贡献.
主要方法:
- 在COVID-19和主要不良心血管事件 (MACE) 的患者中量化2MBC水平.
- 在小鼠体内研究以评估2MBC对血小板高反应性和血栓形成的影响.
- 研究2MBC与血小板受体的相互作用,特别是整合素α2β1,以及其对cPLA2激活的下游影响.
- 利用基因枯竭和药理上抑制整合素α2β1来评估其在2MBC诱导的血栓形成中的作用.
- 评估肠道微生物群的影响,包括抗生素诱导的枯竭,对血2MBC水平和血栓结局的影响.
主要成果:
- 在COVID-19和MACEs患者中,发现2-甲基丁基甲尼丁 (2MBC) 的含量升高.
- 在小鼠中,服用2MBC增加了血小板过敏反应和血栓形成.
- 2MBC直接与血小板整合素α2β1结合,激活cPLA2并导致血小板高反应.
- 整合素α2β1的遗传或药理阻断显著降低了2MBC的前血栓效应.
- 肠道微生物群被证明对2MBC产生至关重要,而抗生素治疗降低了血2MBC水平和促进血栓形成的影响.
结论:
- 2 - 甲基丁基甲尼丁 (2MBC) 是一种新型代谢物,涉及到血栓形成.
- 肠道微生物群在调节2MBC水平和相关的血栓形成风险方面发挥着重要作用.
- 向2MBC-整合素α2β1通路为控制血栓形成提供了潜在的治疗策略,特别是在肠道失生症的背景下.
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