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Review
. 2023 Jul;20(7):447-461.
doi: 10.1038/s41575-023-00771-6. Epub 2023 Apr 21.

Gut-liver axis: barriers and functional circuits

Oliver Pabst  1 , Mathias W Hornef  2 , Frank G Schaap  3   4 , Vuk Cerovic  5 , Thomas Clavel  6 , Tony Bruns  7
Affiliations
Review

Gut-liver axis: barriers and functional circuits

Oliver Pabst et al. Nat Rev Gastroenterol Hepatol. 2023 Jul.

Abstract

The gut and the liver are characterized by mutual interactions between both organs, the microbiome, diet and other environmental factors. The sum of these interactions is conceptualized as the gut-liver axis. In this Review we discuss the gut-liver axis, concentrating on the barriers formed by the enterohepatic tissues to restrict gut-derived microorganisms, microbial stimuli and dietary constituents. In addition, we discuss the establishment of barriers in the gut and liver during development and their cooperative function in the adult host. We detail the interplay between microbial and dietary metabolites, the intestinal epithelium, vascular endothelium, the immune system and the various host soluble factors, and how this interplay establishes a homeostatic balance in the healthy gut and liver. Finally, we highlight how this balance is disrupted in diseases of the gut and liver, outline the existing therapeutics and describe the cutting-edge discoveries that could lead to the development of novel treatment approaches.

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