微生物群对行为的影响:在无菌小鼠中对血清激素代谢和行为特征的综合分析
Léa Roussin1, Elisa Gry1, Mira Macaron1
1Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France.
概括
没有细菌的小鼠表现出活动减少和焦虑增加. 肠道中素 (5-HT) 代谢发生显著变化,而大脑中的5-HT 则保持不变,突出显示了肠道微生物群.
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:
- 无细菌 (GF) 的动物表现出改变的行为和血清素 (5-HT) 代谢.
- 肠道微生物群影响循环和肠道5-HT水平.
- 以前的研究表明,微生物群和行为之间存在联系.
研究的目的:
- 研究无细菌状态对大脑和胃肠道的行为和5-HT代谢的影响.
- 与常规 (CV) 小鼠相比,分析GF小鼠中关键的5-HT通路组件的基因表达.
主要方法:
- 在GF和CV雄性小鼠的行为测试 (运动运动活动,焦虑类行为) 的比较分析.
- 在大脑和肠道组织 (眼皮,结肠,阴茎) 中对血清素受体 (HTR1A,HTR4) 和合成酶 (TPH1,TPH2) 的基因表达分析.
- 对胺转运体 (SLC6A4) 表达的分析.
主要成果:
- 与CV小鼠相比,GF小鼠表现出运动运动活动降低和焦虑类行为增加.
- 没有观察到大脑HTR1A和TPH2基因表达的显著差异.
- 肠道血清素代谢显示出显著的变化:结肠中的TPH1降低,肠中的TPH1增加,结肠中的HTR1A降低,肠和结肠中的HTR4增加,以及结肠和结肠中的SLC6A4增加.
结论:
- 肠道微生物群在调节行为方面发挥着作用,但其影响受到遗传和环境因素的调节.
- GF状态以组织特定的方式显著影响肠道血清代谢,但没有观察到对大脑血清的影响.
- 这些发现强调了肠道微生物群与宿主的神经胃肠系统之间的复杂相互作用.
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