Journal
NEUROPHARMACOLOGY
Volume 205, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropharm.2021.108915
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Funding
- Japan Society for the Promotion of Science (JSPS) KAKENHI [20H03666, 20H00536]
- JSPS [21H05123]
- Advanced Research and Development Programs for Medical Innovation (AMED-CREST) [16gm1010003h0001, 21gm1510002h0001]
- Advanced Research and Development Programs for Medical Innovation (Practical Research Project for Rare/Intractable Disease) [21ek0109556h0001]
- Takeda Science Foundation
- Kanae Foundation for The Promotion of Medical Science
- Mishima Kaiun Memorial Foundation Research Grant
- Yakult BioScience Foundation
- Japan Foundation for Applied Enzymology
- Keio University Medical Fund
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The liver, as the largest organ in the human body, plays a crucial role in metabolism and storage of nutrients, as well as the breakdown and excretion of toxins. It interacts closely with the central nervous system through the liver-brain axis, influencing eating behavior and metabolism. Additionally, the liver has important interactions with the gut and brain, participating in immune responses and other processes.
The liver is the largest organ in the human body and is responsible for the metabolism and storage of the three principal nutrients: carbohydrates, fats, and proteins. In addition, the liver contributes to the breakdown and excretion of alcohol, medicinal agents, and toxic substances and the production and secretion of bile. In addition to its role as a metabolic centre, the liver has recently attracted attention for its function in the liver-brain axis, which interacts closely with the central nervous system via the autonomic nervous system, including the vagus nerve. The liver-brain axis influences the control of eating behaviour in the central nervous system through stimuli from the liver. Conversely, neural signals from the central nervous system influence glucose, lipid, and protein metabolism in the liver. The liver also receives a constant influx of nutrients and hormones from the intestinal tract and compounds of bacterial origin via the portal system. As a result, the intestinal tract and liver are involved in various immunological interactions. A good example is the co-occurrence of primary sclerosing cholangitis and ulcerative colitis. These heterogeneous roles of the liver-brain axis are mediated via the vagus nerve in an asymmetrical manner. In this review, we provide an overview of these interactions, mainly with the liver but also with the brain and gut. This article is part of the special Issue on 'Cross Talk between Periphery and the Brain'.
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