Advances in inflammatory bowel disease pathogenesis: linking host genetics and the microbiome

Area of Science:

• Gastroenterology
• Genetics
• Microbiology

Background:

• Inflammatory bowel diseases (IBD), including ulcerative colitis and Crohn's disease, are increasingly understood through genetic studies.
• These studies emphasize the critical role of the gut microbiome in disease pathogenesis.
• A comprehensive understanding of IBD requires elucidating the complex homeostasis between gut bacteria and the human host.

Purpose of the Study:

• To review current evidence on microbiome-gene interactions in IBD.
• To outline necessary steps for integrating genetic and microbiome sequencing data from patient cohorts.
• To explore the concept of dysbiosis and its potential definition through microbiome functional composition.

Main Methods:

• Literature review of genetic and microbiome research in IBD.
• Discussion of existing risk factors and pathogenic mechanisms.
• Proposal for future research methodologies combining genetic variants and microbiome sequencing.

Main Results:

• Genetic studies have illuminated pathways involved in IBD and the microbiome's significance.
• The functional composition of the gut microbiome may offer a more consistent definition of dysbiosis.
• Genome-microbiome interactions are crucial for understanding IBD and warrant further investigation.

Conclusions:

• Future research must integrate genetic and microbiome data to fully understand IBD pathogenesis.
• Defining dysbiosis by microbiome function could advance the study of genome-microbiome interactions.
• Elucidating host-microbiome interactions is essential for advancing IBD research.