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Adipocyte-hepatocyte crosstalk and the pathogenesis of nonalcoholic fatty liver disease

✍ Scribed by Briohny Smith; Jacob George

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 246 KB
Volume: 49
Category: Article
ISSN: 0270-9139
DOI: 10.1002/hep.22937

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✦ Synopsis

A high-fat diet causes activation of the regulatory protein c-Jun NH2-terminal kinase 1 (JNK1) and triggers development of insulin resistance. JNK1 is therefore a potential target for therapeutic treatment of metabolic syndrome. We explored the mechanism of JNK1 signaling by engineering mice in which the Jnk1 gene was ablated selectively in adipose tissue. JNK1 deficiency in adipose tissue suppressed high-fat diet-induced insulin resistance in the liver. JNK1-dependent secretion of the inflammatory cytokine interleukin-6 by adipose tissue caused increased expression of liver SOCS3, a protein that induces hepatic insulin resistance. Thus, JNK1 activation in adipose tissue can cause insulin resistance in the liver.

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