Cure8 research brief
The paper highlights how the gut microbiome and environment can strongly influence colitis severity in genetically susceptible mice, illustrating a gene–environment–microbiome axis that may help explain heterogeneity in IBD.
Researchers in IBD genetics and microbiome, clinicians interested in disease heterogeneity, and preclinical immunology researchers
The authors compared wild-type and Adamdec1−/− mice co-housed in two different environments and induced colitis with DSS. They found that environmental differences had a stronger effect than genotype on microbiome composition, and Adamdec1−/− mice showed cage-dependent outcomes: some developed severe colitis while others had mild, WT-like disease.
Severe disease in Adamdec1−/− mice was linked with greater neutrophil recruitment, altered myeloid activation (CD11b, monocyte/macrophage changes), impaired epithelial proliferation, and disrupted stem cell–associated gene expression.
Distinct fecal microbiome profiles tracked with these phenotypic differences, supporting a gene–environment–microbiome interaction. The study suggests that in genetically susceptible hosts, environmental and microbial factors can determine colitis severity, and that modifying the microbiome might be a strategy worth exploring.
Mouse model (Adamdec1 knockout) and DSS-induced colitis are experimental systems that model aspects of intestinal inflammation; direct clinical relevance requires further validation in human studies.
Review the original publication for the complete reporting, methods, and context.
Funding disclosed by the source: UK Research and Innovation
This Cure8 brief is based on source text from the linked article. Cure8 is informational only and is not a substitute for professional medical advice, diagnosis, or treatment.
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