肠道微生物三甲代谢与心脏骤停后的脑损伤有关,这种损伤是通过Pyroptosis调节引起的
Chenghao Wu1,2, Mengyuan Diao3, Shuhang Yu4
1Department of Emergency Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
CNS neuroscience & therapeutics
|April 22, 2025
概括
消除肠道微生物群改善了大鼠心脏骤停后的生存率和神经结果. 这表明微生物托代谢物,特别是金氨酸,在心脏骤停后的脑损伤中起作用.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 心脏骤停后脑损伤 (PCABI) 是导致死亡和残疾的主要原因.
- 微生物群-肠-大脑轴与神经系统疾病有关,但其在PCABI中的作用尚未被探索.
- 微生物的托代谢产物是这个轴的潜在媒介.
研究的目的:
- 在PCABI中研究微生物托代谢物的作用.
- 在PCABI中探索微生物群-肠-大脑轴连接.
主要方法:
- 在诱导心脏骤停/心肺复苏 (CA/CPR) 之前,老鼠先用抗生素 (Abx) 进行预治疗,以耗尽肠道微生物群.
- 评估生存率和神经结果.
- 使用了16s rDNA测序,PICRUSt2,代谢分析,以及体外/体内分子技术 (qRT-PCR,免疫组织化学,免疫光).
主要成果:
- 在CA/CPR后的老鼠中,抗生素治疗改善了24小时的生存率和神经功能.
- Abx改变了微生物的组成,增加了微生物的三甲代谢,特别是通过kynurenine途径.
- 便,血液循环和大脑中的高氨酸水平与上调的氨酸碳化合物受体 (AhR) 相相关,并抑制了NLRP3诱导的烧灭.
结论:
- 肠道微生物群和微生物群-肠道-大脑轴在PCABI进展中至关重要.
- 在PCABI中,Kynurenine可能通过抑制NLRP3诱导的烧会产生神经保护作用.
- 这项研究强调了金氨酸作为PCABI的潜在治疗标.
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