Microbiome-Derived Effectors and Convergent Host Pathways in Organ Injury and Fibrosis

Area of Science:

• Microbiome research
• Host-microbe interactions
• Biochemistry

Background:

• The human microbiome acts as a biochemical network, producing metabolites and peptides that regulate host physiology.
• Under normal conditions, these microbial compounds maintain epithelial integrity, immune balance, and metabolic health.
• Dysbiosis alters the microbiome's chemical output, promoting host injury.

Purpose of the Study:

• To explore how microbiome-derived signals influence host pathways.
• To link gut dysbiosis to specific organ system disorders.
• To reframe microbiome-associated diseases as disorders of microbial chemistry and host pathway activation.

Main Methods:

• Analysis of microbiome-derived metabolites, ligands, and peptides.
• Investigation of host pathway activation by microbial signals.
• Framework development linking gut imbalance to organ-specific diseases.

Main Results:

• Microbiome signals converge on key host pathways like pattern-recognition receptor activation, mitochondrial dysfunction, and inflammation.
• Dysbiosis shifts host responses towards injury and tissue vulnerability.
• Microbial peptides, such as corisin, can directly amplify tissue damage.

Conclusions:

• Microbiome-associated diseases can be viewed as a consequence of altered microbial chemistry and host pathway engagement.
• This understanding provides a basis for developing mechanism-based biomarkers.
• Targeted therapeutic strategies can be developed based on microbial chemistry and host pathway modulation.