Linking Brain and Immune Transcriptomes to Gut-Derived Metabolites in Hepatic Encephalopathy: An Explorative...

Area of Science:

• * Bioinformatics and Systems Biology
• * Molecular Biology
• * Gut Microbiome Research

Background:

• * Hepatic encephalopathy (HE) is a severe complication of liver failure, traditionally linked to hyperammonemia.
• * Emerging evidence implicates gut microbiota-derived metabolites in HE pathogenesis via systemic inflammation and neurotoxicity.
• * The integrated molecular mechanisms connecting these metabolites to HE are not well understood.

Purpose of the Study:

• * To elucidate the integrated molecular mechanisms linking gut microbiota-derived metabolites to HE.
• * To identify novel diagnostic and therapeutic targets for HE using a systems biology approach.
• * To establish a systems-level framework connecting gut metabolites to HE through gene networks.

Main Methods:

• * Analysis of differentially expressed genes (DEGs) in peripheral and central tissues of HE patients.
• * Extraction of genes associated with key gut microbiota-derived metabolites (choline, lipids, SCFAs, tryptophan catabolites, bile acids).
• * Multi-level enrichment analyses and prediction of miRNAs and drugs targeting identified gene-metabolite interactions.

Main Results:

• * Identification of nine hub genes in gut-systemic interactions and 29 in gut-brain interactions relevant to HE.
• * Significant impairment of pathways including IL-24 signaling, TP53, and oxidative stress by gut metabolites and peripheral HE genes.
• * Alterations in mitochondrial fatty acid β-oxidation, neuroinflammation, and glutamate tone by gut metabolites and central HE genes.

Conclusions:

• * Presents the first systems-level framework linking gut metabolites to HE, challenging the ammonia-centric view.
• * Predicted miRNAs and drugs show translational potential for precision medicine in HE.
• * Experimental validation of identified targets is crucial for advancing HE therapeutic strategies.