先天免疫、食欲控制和能量代谢基因的变异与宿主的心脏代谢健康和肠道微生物群落组成有关。

Variants in genes of innate immunity, appetite control and energy metabolism are associated with host cardiometabolic health and gut microbiota composition.

机构信息

Grupo de Investigación en Genética Molecular (GENMOL), Sede de Investigación Universitaria, Universidad de Antioquia , Medellin, Colombia.

Vidarium-Nutrition, Health and Wellness Research Center, Grupo Empresarial Nutresa , Medellin, Colombia.

出版信息

Gut Microbes. 2020 May 3;11(3):556-568. doi: 10.1080/19490976.2019.1619440. Epub 2019 Jun 3.

Abstract

Identifying the genetic and non-genetic determinants of obesity and related cardiometabolic dysfunctions is cornerstone for their prevention, treatment, and control. While genetic variants contribute to the cardiometabolic syndrome (CMS), non-genetic factors, such as the gut microbiota, also play key roles. Gut microbiota is intimately associated with CMS and its composition is heritable. However, associations between this microbial community and host genetics are understudied. We contribute filling this gap by genotyping 60 variants in 39 genes of three modules involved in CMS risk, measuring cardiometabolic risk factors, and characterizing gut microbiota in a cohort of 441 Colombians. We hypothesized that CMS risk variants were correlated with detrimental levels of clinical parameters and with the abundance of disease-associated microbes. We found several polymorphisms in genes of innate immunity, appetite control, and energy metabolism that were associated with metabolic dysregulation and microbiota composition; the associations between host genetics and cardiometabolic health were independent of the participants' gut microbiota, and those between polymorphisms and gut microbes were independent of the CMS risk. Associations were also independent of the host genetic ancestry, diet and lifestyle. Most microbes explaining genetic-microbiota associations belonged to the families and . Multiple CMS risk alleles were correlated with increased abundance of beneficial microbiota, suggesting that the phenotypic outcome of the evaluated variants might depend upon the genetic background of the studied population and its environmental context. Our results provide additional evidence that the gut microbiota is under the host genetic control and present pathways of host-microbe interactions.

摘要

确定肥胖症和相关代谢功能紊乱的遗传和非遗传决定因素是预防、治疗和控制肥胖症和相关代谢功能紊乱的基石。虽然遗传变异有助于代谢综合征(CMS),但非遗传因素,如肠道微生物群,也起着关键作用。肠道微生物群与 CMS 密切相关,其组成具有遗传性。然而,该微生物群落与宿主遗传之间的关联研究较少。我们通过对 39 个 CMS 风险相关模块中的 60 个基因变体进行基因分型,测量代谢危险因素,并对 441 名哥伦比亚人的肠道微生物群进行特征描述,填补了这一空白。我们假设 CMS 风险变体与临床参数的不良水平以及与疾病相关微生物的丰度相关。我们发现了一些与先天免疫、食欲控制和能量代谢有关的基因中的多态性与代谢失调和微生物群组成有关;宿主遗传与心血管代谢健康之间的关联独立于参与者的肠道微生物群,而多态性与肠道微生物群之间的关联独立于 CMS 风险。关联也独立于宿主遗传祖先、饮食和生活方式。解释遗传-微生物群关联的大多数微生物都属于 和 科。多个 CMS 风险等位基因与有益微生物丰度的增加相关,这表明所评估变体的表型结果可能取决于所研究人群的遗传背景及其环境背景。我们的结果提供了更多证据表明,肠道微生物群受宿主遗传控制,并呈现宿主-微生物相互作用的途径。

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