社会压力改变了雄性,雌性和侵略性小鼠的肠道微生物组合
Isabel Garcia1, Fatmanur Kilic1, Chris-Ann Bryan1,2
1Department of Biology, Rutgers, the State University of New Jersey, Camden, NJ, USA.
Brain, behavior, & immunity - health
|December 1, 2025
概括
慢性社会失败压力 (CSDS) 改变了雄性和雌性小鼠的肠道细菌组成,影响了微生物群的多样性,并导致了失生症. 特定的细菌变化预测了压力易感性,突出了与压力相关的肠道微生物组变化的性别差异.
科学领域:
- 微生物组研究的研究.
- 神经科学是一个神经科学.
- 行为科学是一种行为科学.
背景情况:
- 心理压力显著影响肠道微生物组的组成,导致失生症.
- 肠道功能障碍与不良的身体和心理健康结果有关.
- 了解压力引起的微生物组变化,特别是性别差异,对于与压力相关的疾病研究至关重要.
研究的目的:
- 研究慢性社会失败压力 (CSDS) 如何影响雄性和雌性小鼠的肠道细菌组成.
- 识别由CSDS改变的特定细菌种群及其与应激弹性或易受性的相关性.
- 为了确定性是否影响肠道微生物组对压力的反应.
主要方法:
- 在C57BL/6小鼠中利用了慢性社会失败压力 (CSDS) 范式.
- 在CSDS的第1天和第10天收集的便样本用于16S核糖体RNA测序.
- 分析了受压力,弹性,易感和控制小鼠的微生物组合 (类,属,物种),包括侵略者,考虑到性别差异.
主要成果:
- 与非压力对照不同的是,CSDS减少了肠道微生物群的多样性,并在所有压力群体 (包括侵略者) 中诱导了失生症.
- CSDS显著改变了所有肠道细菌系的相对丰度,并在Firmicutes系内减少了属.
- 一个未培养的Ruminococcus物种在第一天预测了CSDS后的社会回避,在压力较大的女性中更明显的相关性.
结论:
- 在雄性和雌性小鼠中,CSDS极大地重塑了肠道微生物组的组成.
- 性行为在调节肠道微生物对慢性压力的反应方面发挥着作用.
- 特定的微生物种群变化,如球菌的丰富性,可以作为应激易感和社会回避的早期指标,具有潜在的性别特异性影响.
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