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肠道微生物代谢物TMAO增强血小板高反应性和血栓形成风险
Weifei Zhu1, Jill C Gregory1, Elin Org2
1Department of Cellular & Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, USA.
Cell
|March 15, 2016
概括
肠道微生物产生三甲基胺N氧化物 (TMAO),这种化合物直接增加了血小板过敏反应和血栓形成风险. 较高的TMAO血水平预测了未来的心脏病发作和中风事件.
科学领域:
- 心血管生物学 心血管生物学
- 微生物组研究 微生物组研究
- 血液学 血液学 血液学
背景情况:
- 正常的血小板功能对于血液静止至关重要.
- 血小板活性增加与心脏代谢疾病和血栓形成有关.
- 肠道微生物在血小板功能中的作用尚未完全理解.
研究的目的:
- 调查肠道微生物和三甲基胺N氧化物 (TMAO) 对血小板过敏反应和血栓形成的直接贡献.
- 建立饮食,肠道微生物群,TMAO和血栓形成风险之间的机制联系.
主要方法:
- 对超过4000名受试者的血TMAO水平进行分析,以预测发生的血栓形成.
- 在体外研究中暴露血小板TMAO以评估激活.
- 使用饮食干预,无菌小鼠和微生物移植的动物模型研究.
主要成果:
- 血TMAO水平升高独立预测了三年内血栓形成 (心脏病发作,中风) 的风险.
- 通过增加细胞内释放,TMAO暴露增强了血小板激活.
- 肠道微生物群和TMAO被证实在体内调节血小板高响应性和血栓形成潜力.
结论:
- 通过TMAO的产生,肠道微生物直接促进了血小板的高反应性,增加了血栓形成的风险.
- 一个新的机制性途径将饮食中的营养物质,肠道微生物群,TMAO,血小板功能和血栓形成联系起来.
- 确定了与TMAO生产和血栓形成潜力相关的特定微生物种群.
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