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Research Article: Gut liver brain axis in diseases: the implications for therapeutic interventions

Date Published: 2023-12-06

Abstract:
Gut-liver-brain axis is a three-way highway of information interaction system among the gastrointestinal tract, liver, and nervous systems. In the past few decades, breakthrough progress has been made in the gut liver brain axis, mainly through understanding its formation mechanism and increasing treatment strategies. In this review, we discuss various complex networks including barrier permeability, gut hormones, gut microbial metabolites, vagus nerve, neurotransmitters, immunity, brain toxic metabolites, ?-amyloid (A?) metabolism, and epigenetic regulation in the gut-liver-brain axis. Some therapies containing antibiotics, probiotics, prebiotics, synbiotics, fecal microbiota transplantation (FMT), polyphenols, low FODMAP diet and nanotechnology application regulate the gut liver brain axis. Besides, some special treatments targeting gut-liver axis include farnesoid X receptor (FXR) agonists, takeda G protein-coupled receptor 5 (TGR5) agonists, glucagon-like peptide-1 (GLP-1) receptor antagonists and fibroblast growth factor 19 (FGF19) analogs. Targeting gut-brain axis embraces cognitive behavioral therapy (CBT), antidepressants and tryptophan metabolism-related therapies. Targeting liver-brain axis contains epigenetic regulation and A? metabolism-related therapies. In the future, a better understanding of gut-liver-brain axis interactions will promote the development of novel preventative strategies and the discovery of precise therapeutic targets in multiple diseases.

Introduction:
In recent years, the importance of the liver brain axis in maintaining human health has received attention.1 Scientific investigations show that ties among gut dysbiosis or disruption, brain2 and liver3 diseases mean the pathophysiology of liver and brain diseases is frequently linked to gastrointestinal problems.4,5 For example, a leaky gut is described in nonalcoholic fatty liver disease (NAFLD),6 alcoholic liver disease (ALD),7 non-alcoholic steatohepatitis (NASH),8 alcoholic steatohepatitis (ASH),9…

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