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Related Concept Videos

Liver Regeneration01:24

Liver Regeneration

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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
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Branched-chain amino acids and their metabolites decrease human and rat hepatic stellate cell activation.

Maria Camila Trillos-Almanza1, Magnolia Martinez Aguilar2, Manon Buist-Homan2,3

  • 1Department of Gastroenterology and Hepatology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands. m.c.trillos.almanza@umcg.nl.

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|November 4, 2024
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Summary
This summary is machine-generated.

Branched-chain amino acids (BCAAs) and their metabolites show promise in inhibiting hepatic stellate cell activation, a key factor in liver disease. Supplementation with branched-chain α-keto acids (BCKAs) may offer a new strategy for managing end-stage liver diseases (ESLDs).

Keywords:
BCAAsBCKAsBranched-chain amino acidsBranched-chain keto acidsEnd-stage liver diseaseFibrosisHepatic stellate cellsLiver cirrhosis

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Area of Science:

  • Hepatology and Gastroenterology
  • Biochemistry and Molecular Biology
  • Nutritional Science

Background:

  • End-stage liver diseases (ESLDs) pose a significant global health burden with limited therapeutic options.
  • Hepatic stellate cell (HSC) activation drives liver fibrosis, making it a key therapeutic target.
  • Decreased branched-chain amino acids (BCAAs) in ESLD patients suggest a potential role for supplementation.

Purpose of the Study:

  • To investigate the efficacy of BCAAs and their metabolites, branched-chain α-keto acids (BCKAs), in modulating HSC activation.
  • To assess the effects of BCAAs and BCKAs on both preventing and reversing HSC activation in human and rat models.

Main Methods:

  • Primary rat and human hepatic stellate cells (HSCs) were isolated and cultured.
  • HSCs were treated with BCAAs or BCKAs to evaluate their impact on activation markers.
  • Experiments assessed both preventative (early) and reversal (late) effects on HSC activation.

Main Results:

  • Leucine and BCKAs significantly reduced fibrotic markers and proliferation in rat HSCs.
  • A specific isoleucine metabolite markedly decreased human HSC proliferation and increased enzyme activity.
  • Other BCKA metabolites demonstrated antifibrotic effects in human HSCs from non-cirrhotic livers.

Conclusions:

  • BCAAs and their metabolites inhibit HSC activation, exhibiting species-specific effects.
  • BCKAs show potential as a therapeutic strategy for managing ESLDs, warranting further investigation.
  • Patient nutritional status and amino acid profiles should be considered for BCKA supplementation efficacy.