人体肠道中的细菌菌株与宿主生理学有关
bioRxiv : the preprint server for biology
|December 15, 2025
概括
人类肠道细菌菌株在遗传上有所不同. 丰富的物种是稳定的,而罕见的物种更容易发生突变,影响宿主健康,并为个性化微生物组疗法提供目标.
科学领域:
- 微生物组研究的研究.
- 遗传学 是一个遗传学.
- 人类生理学 人类生理学
背景情况:
- 人类微生物群显著影响宿主生理学.
- 微生物的复杂性超越了物种识别,扩展到菌株水平的变化.
- 了解物种内遗传多样性对于理解宿主-微生物相互作用至关重要.
研究的目的:
- 分析肠道细菌的物种内遗传多样性,跨越一个大型的,跨国队列.
- 为了研究细菌菌株丰富度,遗传稳定性和生态行为之间的关系.
- 绘制菌株级微生物与宿主生理特征的关联.
主要方法:
- 对来自24997个个体的936种肠道细菌物种的遗传多样性的分析.
- 菌株丰度与克隆内突变率的相关性.
- 菌株生态策略的关联 (共存与排斥) 与特定的基因功能.
- 深度表型数据的整合,以将细菌菌株与宿主生理学联系起来.
主要成果:
- 高度丰富的肠道细菌物种显示出更大的菌株稳定性.
- 低丰度物种表现出增加的克隆内突变.
- 相互排斥的菌株通常是克隆的,而基因变异的菌株倾向于共存.
- 菌株周转与化学反应和分泌基因相关;与定数感应和分泌系统的共存.
- 创建了一个与宿主特征的菌株水平关联图谱,将特定的细菌 (例如,Phocaeicola vulgatus,Lachnospira eligens,Parabacteroides distasonis) 与肥胖,睡眠和铁恒温联系起来.
结论:
- 肠道细菌菌株的多样性是微生物生态和宿主相互作用的关键决定因素.
- 细菌菌株内的特定遗传元素会影响它们的生态动态和宿主关系.
- 开发的资源为针对特定宿主健康结果的个性化微生物干预提供了基础.
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