The gut-microbiota-brain changes across the liver disease spectrum

Area of Science:

• Microbiology
• Hepatology
• Neuroscience

Background:

• Gut microbiota dysbiosis is implicated in liver disease progression.
• No effective treatments exist for the full spectrum of liver disease.
• Understanding the gut-brain axis in liver disease is crucial.

Purpose of the Study:

• To investigate dynamic gut microbiota changes across the liver disease spectrum.
• To assess concurrent alterations in cognition and brain metabolism.
• To identify potential gut microbiota targets for therapeutic intervention.

Main Methods:

• Rats were assigned to four groups: control diet (NC), high-fat/high-cholesterol (HFHC), NC + thioacetamide (TAA), and HFHC + TAA.
• Diets were administered for 14 weeks; TAA was given intraperitoneally for 3 days.
• Evaluated plasma biochemistry, liver damage, gut microbiota composition, cognitive function, and brain oxidative metabolism.

Main Results:

• Significant changes in plasma biochemistry and liver damage were observed across the liver disease spectrum.
• Gut microbiota composition varied, with increased Enterobacteriaceae in HFHC groups and Akkermansiaceae in the NC + TAA group.
• Cognitive deficits, including impaired object discrimination and spatial memory, and altered brain oxidative metabolism were evident in diseased groups.

Conclusions:

• Liver disease progression significantly alters gut microbiota composition and structure.
• The gut-brain axis is demonstrably affected across the liver disease spectrum, impacting cognition and metabolism.
• Specific gut microbiota alterations present potential therapeutic targets for liver disease management.