精选的微生物代谢物在小肠中通过受体介导的信号调节阴道活动
Kelly G Jameson1, Sabeen A Kazmi1, Takahiro E Ohara1
1Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA 90095, USA.
iScience
|January 29, 2025
概括
肠道微生物群影响阴道神经活动,这对肠-大脑通信至关重要. 微生物代谢物,如短链脂肪酸和胆酸,激活迷走神经,影响脑干神经元.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 迷走神经促进了肠-大脑轴的通信,但直接证据将肠道微生物组活动与迷走神经功能联系在一起是有限的.
- 了解微生物组与阴道神经相互作用的机制是破译肠-大脑信号的关键.
研究的目的:
- 为了研究肠道微生物对神经活动的直接影响.
- 为了识别调节神经功能的微生物代谢物,并探索它们的信号通路.
主要方法:
- 在没有细菌的小鼠和常规殖民的小鼠中比较阴道音调.
- 在小鼠中使用抗生素和肠道过物的肠道微生物群的急性操纵.
- 评估神经对特定微生物代谢物 (短链脂肪酸,胆酸,3-二硫酸盐) 的反应.
- 电生理学记录用于监测大脑干中神经元的激活.
主要成果:
- 没有细菌的小鼠表现出减少的阴道音调,这是通过微生物群殖民恢复的.
- 在常规小鼠中,抗生素治疗降低了阴道活动,使用常规肠道过剂可逆.
- 发现特定的微生物代谢物间接地以受体依赖的方式刺激阴道活动.
- 代谢物 perfusion 激活了不同的神经元子集,并导致脑干神经元激活.
结论:
- 肠道微生物组通过特定的肠道代谢产物积极调节阴道 afferent神经元活动.
- 这种对神经信号的微生物调节是肠-大脑通信的关键机制.
- 这些发现突出了微生物代谢产品在调节通过迷走神经传递的化学传感信号中的作用.
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