Multiomics Integration Reveals Microbial Gene Interactions Shaping Host Responses in a DSS-Induced Colitis Mouse...

Area of Science:

• Microbiome research
• Immunology
• Gastroenterology

Background:

• Inflammatory bowel disease (IBD) pathogenesis is complex, involving host-microbiome interactions.
• Multi-omics approaches are crucial for identifying IBD biomarkers and therapeutic targets.
• The dextran sulfate sodium (DSS)-induced colitis model effectively mimics IBD-related gut inflammation and barrier dysfunction.

Purpose of the Study:

• To investigate the relationship between microbial transcriptomic alterations and host immune responses in IBD.
• To identify key microbial genes and pathways involved in inflammation and immune modulation.
• To explore the role of microbial aminoacyl-tRNA synthetases (aaRSs) in IBD pathogenesis.

Main Methods:

• Utilized a multi-omics approach in a DSS-induced colitis mouse model.
• Analyzed microbial transcriptomic data to identify changes in gene expression under inflammatory conditions.
• Correlated microbial gene pathways with host immunological pathways.

Main Results:

• Identified significant regulation of microbial genes in carbohydrate metabolism, nucleotide metabolism, and aminoacyl-tRNA biosynthesis during inflammation.
• Discovered key hub microbes and microbial genes associated with host immune pathways.
• Highlighted microbial aminoacyl-tRNA synthetases (aaRSs) as crucial in immune cell activation and inflammatory pathways.

Conclusions:

• Microbial gene expression, especially in metabolic pathways, is intricately linked to host immune responses in IBD.
• Microbial aaRSs play a significant role in modulating immune responses beyond their translational function.
• Targeting microbial aaRSs presents a potential therapeutic strategy for IBD and other inflammatory diseases.