人体肠道微生物组中的细菌SNP与宿主BMI相关
Liron Zahavi1,2, Amit Lavon1,2, Lee Reicher1,2,3
1Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel.
Nature medicine
|November 3, 2023
概括
全元基因组关联研究 (MWAS) 将细菌单核酸多态 (SNP) 与宿主特征联系起来. 这项研究在大量人群中确定了与体重指数 (BMI) 相关的细菌SNP,揭示了新的机制性见解.
科学领域:
- 微生物组研究的研究.
- 人类遗传学 人类遗传学
- 转基因组学是指转基因组学.
背景情况:
- 全基因组关联研究 (GWAS) 识别了与健康特征相关的人类单核酸多态 (SNP).
- 全元基因组关联研究 (MWASs) 提供了一种平行方法,将细菌SNP与宿主表型联系起来,可能揭示出机械学的见解.
- 到目前为止,很少有MWAS研究.
研究的目的:
- 开发和应用一个系统检测与宿主表型相关的细菌SNP的框架.
- 为了研究细菌SNP与人体质量指数 (BMI) 之间的关联,在一个大型的人群中.
主要方法:
- 招募7190名健康个体进行肠道基因组样本采集.
- 开发一个全基因组关联研究 (MWAS) 框架,以确定与宿主表型相关的细菌SNP.
- 统计分析以检测显著的SNP-表型关联和独立信号,控制共变量.
主要成果:
- 发现了1358个细菌SNP与宿主BMI之间的统计学意义上的关联,确定了40个独立的关联.
- 在地理上不同的队列中复制17个协会,独立于饮食,药物或运动.
- 在27种细菌物种中确定与BMI相关的SNP,其中包括12种未通过标准相对丰度分析检测到的细菌物种.
- 在 *Bilophila wadsworthia* (炎症途径) 和 *Faecalibacterium prausnitzii* (能量代谢) 中发现了特定的SNP关联.
结论:
- 这项研究表明,MWAS对于在核酸水平上发现新型宿主-微生物相互作用的实用性.
- 这些发现强调了考虑细菌遗传多样性的重要性,超出了物种水平的丰富性,以了解像BMI这样的宿主表型.
- 这些结果为进一步研究特定细菌SNP在人类健康和疾病中的功能作用提供了基础.
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