Host Genetics and Gut Microbiome Interactions

The human gut microbiome comprises trillions of microorganisms whose composition and functional capacities are shaped by a dynamic interplay with the host’s genetic blueprint. Variants in host genes regulate microbial diversity, influence the colonisation of specific taxa and modulate microbial gene functions such as carbohydrate metabolism and lipid synthesis. In turn, microbial metabolites and structural components interact with host immune and metabolic pathways, affecting disease risk, nutrient absorption and drug response. Advances in multi-omics, including metagenomics, transcriptomics and lipidomics, have begun to unravel the bidirectional communication channels linking host loci to microbial traits. Understanding these interactions is critical for developing precision therapeutics, from tailored probiotics to genome-informed dietary interventions, and for improving prediction models of chronic diseases.

Research from Nature Portfolio

Meta-analysis of over 9,000 individuals has uncovered associations between host ABO and FUT2 genotypes and structural variation in commensal species such as Faecalibacterium prausnitzii and Collinsella aerofaciens. These structural variants encode saccharide-utilisation pathways that directly influence host cardiometabolic health.

In a genetically diverse mouse cohort, quantitative trait locus mapping has pinpointed host regions controlling the abundance of Akkermansia muciniphila and levels of its immunomodulatory ornithine lipids. Integrated lipidomics and transcriptomics revealed co-regulated host genes involved in metabolic and immune responses, highlighting lipid-mediated microbe–host signalling.

Risk prediction models combining polygenic risk scores with gut metagenomic risk profiles in a long-term population cohort have shown superior performance in forecasting coronary artery disease, type 2 diabetes and other chronic conditions. This work emphasises the additive value of integrating host and microbial genomics for early detection strategies.

Host Genetics and Gut Microbiome Interactions publication trend

The graph below shows the total number of articles in host genetics and gut microbiome interactions across all publications each year (not limited to Nature Index journals).

Technical terms

Quantitative Trait Locus (QTL): A genomic region statistically associated with variation in a measurable trait, such as microbial abundance.

Metagenomics: Analysis of genetic material recovered directly from gut microbial communities, enabling functional and taxonomic profiling.

Polygenic Risk Score (PRS): An aggregate measure of disease susceptibility derived from the combined effects of multiple genetic variants.

Structural Variation: Large-scale genomic alterations in microbes, including insertions, deletions and duplications, that affect gene content and function.

References

1. Host genetic regulation of human gut microbial structural variation. Nature (2024).
2. Genetic mapping of microbial and host traits reveals production of immunomodulatory lipids by Akkermansia muciniphila in the murine gut. Nature Microbiology (2023).
3. Integration of polygenic and gut metagenomic risk prediction for common diseases. Nature Aging (2024).
4. Using the collaborative cross to identify the role of host genetics in defining the murine gut microbiome. Microbiome (2023).
5. How longitudinal data can contribute to our understanding of host genetic effects on the gut microbiome. Gut Microbes (2023).