Serum metabolomic profiling in acute alcoholic hepatitis identifies multiple dysregulated pathways

Area of Science:

• Biochemistry
• Metabolomics
• Hepatology

Background:

• Animal studies suggest energy homeostasis disruption in acute alcoholic hepatitis (AAH) pathogenesis.
• Relevance to human AAH development remains unclear.
• Serum metabolomics can characterize metabolic pathways in severe AAH.

Purpose of the Study:

• Characterize metabolic pathway alterations in severe AAH using unbiased serum metabolomics.
• Identify potential biomarkers for disease prognosis in AAH patients.

Main Methods:

• Prospective case-control study: 25 severe AAH patients, 25 alcoholic cirrhosis patients.
• Serum metabolomics profiling performed within 24 hours of encounter.
• 180-day survival follow-up for prognosis assessment.

Main Results:

• 234 biochemicals altered in severe AAH; metabolomics profiles accurately distinguished cohorts.
• Associated with enhanced lipolysis, impaired fatty acid oxidation, altered bile acids, and gut dysbiosis.
• Identified changes in glucose, TCA cycle, glutathione metabolism, and antioxidant status; 15 metabolites linked to 180-day survival.

Conclusions:

• Severe AAH exhibits a unique metabolic phenotype across multiple pathways.
• Metabolomics profiling identified prognostic biomarkers for AAH.
• Further validation in larger cohorts is planned.