肠道微生物群和精神分裂症之间的因果关系的综合证据:孟德尔的随机化和16S rRNA研究
Jianye Zeng1, Xiumei Zhu2, Huajie Ba3
1Institute of Forensic Science, Fudan University, Shanghai, China.
Brain, behavior, & immunity - health
|November 10, 2025
概括
精神分裂症风险可能受到肠道细菌的影响. 基因预测的Bifidobacterium丰富度增加与更高的精神分裂症风险有关,这表明肠道微生物群在这种疾病中的潜在因果作用.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 遗传学 是一个遗传学.
背景情况:
- 精神分裂症是一种严重的精神疾病,具有复杂且不完全理解的病因.
- 新出现的证据表明,肠道微生物群通过微生物群-肠道-大脑轴在精神分裂症的发病过程中起作用.
- 然而,特定的肠道微生物和精神分裂症之间的确定的因果关系仍然不清楚.
研究的目的:
- 通过两样本的孟德尔随机化 (MR) 方法,研究肠道微生物种群和精神分裂症之间的潜在因果关系.
- 通过分析精神分裂症患者和健康对照者的便微生物组成,提供生物背景.
- 探索肠道微生物群-大脑轴在精神分裂症中的作用.
主要方法:
- 采用双样本的孟德尔随机化 (MR) 分析,评估肠道微生物丰富度和精神分裂症风险之间的因果关系.
- 便样本的16S rRNA V3-V4测序在一个独立的精神分裂症患者队列 (n=21) 上进行,并与健康对照组 (n=21) 相匹配.
- 对微生物属进行了探索性和有针对性的分析,包括多次比较的FDR校正.
主要成果:
- 预先的MR分析发现了七种与精神分裂症风险显著相关的微生物种群.
- 较高的基因预测Bifidobacterium丰度与精神分裂症风险增加有关 (OR=1.47,95%CI:1.05-2.05).
- 针对性的16SrRNA分析证实了MR识别的四种种类型中的三种类型的显著群体差异,包括Bifidobacterium.
结论:
- 这项研究提供了融合的证据,整合了MR和16SrRNA测序,对于特定肠道微生物,特别是Bifidobacterium在精神分裂症风险中的潜在因果作用.
- 这些发现凸显了精神疾病中宿主微生物群相互作用的上下文依赖性.
- 需要进一步的菌株级和功能性研究,以充分阐明肠道微生物群在精神分裂症发病过程中的作用.
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