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Gut. 2017 Jun;66(6):1031-1038. doi: 10.1136/gutjnl-2015-311326. Epub 2016 Apr 6.

The effect of heritability and host genetics on the gut microbiota and metabolic syndrome.

Lim MY1,2, You HJ1,2,3, Yoon HS1, Kwon B1, Lee JY1, Lee S1, Song YM4, Lee K5, Sung J6, Ko G1,3,7.

Author information

1
Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.
2
Institute of Health and Environment, Seoul National University, Seoul, Republic of Korea.
3
Center for Human and Environmental Microbiome, Seoul National University, Seoul, Republic of Korea.
4
Department of Family Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
5
Department of Family Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea.
6
Department of Epidemiology, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.
7
N-Bio, Seoul National University, Seoul, Republic of Korea.

Abstract

OBJECTIVE:

Metabolic syndrome (MetS) arises from complex interactions between host genetic and environmental factors. Although it is now widely accepted that the gut microbiota plays a crucial role in host metabolism, current knowledge on the effect of host genetics on specific gut microbes related to MetS status remains limited. Here, we investigated the links among host genetic factors, gut microbiota and MetS in humans.

DESIGN:

We characterised the gut microbial community composition of 655 monozygotic (n=306) and dizygotic (n=74) twins and their families (n=275), of which approximately 18% (121 individuals) had MetS. We evaluated the association of MetS status with the gut microbiota and estimated the heritability of each taxon. For the MetS-related and heritable taxa, we further investigated their associations with the apolipoprotein A-V gene (APOA5) single nucleotide polymorphism (SNP) rs651821, which is known to be associated with triglyceride levels and MetS.

RESULTS:

Individuals with MetS had a lower gut microbiota diversity than healthy individuals. The abundances of several taxa were associated with MetS status; Sutterella, Methanobrevibacter and Lactobacillus were enriched in the MetS group, whereas Akkermansia, Odoribacter and Bifidobacterium were enriched in the healthy group. Among the taxa associated with MetS status, the phylum Actinobacteria, to which Bifidobacterium belongs, had the highest heritability (45.7%). Even after adjustment for MetS status, reduced abundances of Actinobacteria and Bifidobacterium were significantly linked to the minor allele at the APOA5 SNP rs651821.

CONCLUSIONS:

Our results suggest that an altered microbiota composition mediated by a specific host genotype can contribute to the development of MetS.

KEYWORDS:

ENERGY METABOLISM; ENTERIC BACTERIAL MICROFLORA; GENETIC POLYMORPHISMS

PMID:
27053630
DOI:
10.1136/gutjnl-2015-311326
[Indexed for MEDLINE]

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