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Gut-liver axis: barriers and functional circuits.

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The gut-liver axis involves interactions between the gut, liver, microbiome, and diet. Understanding these gut-liver axis barriers and their disruption in disease is key for developing new treatments.

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Area of Science:

  • Gastroenterology and Hepatology
  • Microbiology
  • Immunology

Background:

  • The gut and liver exhibit complex mutual interactions influenced by the microbiome, diet, and environment.
  • These interactions are collectively termed the gut-liver axis.
  • Enterohepatic tissues form critical barriers against gut-derived microbes and dietary factors.

Purpose of the Study:

  • To review the gut-liver axis, focusing on the protective barriers in the gut and liver.
  • To explore the developmental establishment and adult cooperative function of these barriers.
  • To discuss the disruption of homeostasis in gut and liver diseases and potential therapeutic strategies.

Main Methods:

  • Review of existing literature on the gut-liver axis.
  • Analysis of the interplay between microbial/dietary metabolites, host tissues, and immune factors.
  • Examination of developmental and adult barrier functions.
  • Discussion of disease pathogenesis and therapeutic advancements.

Main Results:

  • Barriers in the gut and liver are established during development and cooperate in adults.
  • A complex interplay of metabolites, epithelia, endothelium, immune cells, and soluble factors maintains gut-liver homeostasis.
  • Disruption of this balance underlies gut and liver diseases.

Conclusions:

  • The gut-liver axis is a dynamic system regulated by multiple interacting components.
  • Understanding barrier function and its disruption is crucial for disease management.
  • Novel therapeutic approaches targeting the gut-liver axis hold promise for treating gastrointestinal and hepatic diseases.