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Published in: Inflammation 6/2011

01-12-2011

Berberine Inhibits Inflammatory Response and Ameliorates Insulin Resistance in Hepatocytes

Authors: Tianjiong Lou, Zhongai Zhang, Zhilei Xi, Kang Liu, Lin Li, Baolin Liu, Fang Huang

Published in: Inflammation | Issue 6/2011

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Abstract

Berberine, a major isoquinoline alkaloid present in Chinese herb Rhizoma coptidis, is a potent inhibitor of inflammation and has anti-diabetic activity. This study aims to investigate effects of berberine on ameliorating insulin resistance and molecular mechanisms involved in HepG2 cells. Inflammatory responses and insulin resistance were induced by palmitate (PA) stimulation for 24 h. Treatment of berberine enhanced insulin-mediated glycogen synthesis and restored insulin inhibition of triglyceride secretion. Stimulation of PA resulted in IL-6 and TNF-α production in HepG2 cells, and antibody-neutralizing assay further confirmed that IL-6 and TNF-α were involved in the development of insulin resistance. Berberine effectively inhibited IL-6 and TNF-α production in a concentration-dependent manner, demonstrating its anti-inflammatory activity in hepatocytes. Meanwhile, PA-evoked inflammation impaired insulin signaling cascade and berberine improved insulin signaling cascade by modification of Ser/Thr phosphorylation of insulin receptor substrate-1(IRS-1) and downstream Akt (T308). Above results suggest that berberine improved insulin sensitivity in PA-stimulated hepatocytes and this regulation might relative with its anti-inflammatory activity.
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Metadata
Title
Berberine Inhibits Inflammatory Response and Ameliorates Insulin Resistance in Hepatocytes
Authors
Tianjiong Lou
Zhongai Zhang
Zhilei Xi
Kang Liu
Lin Li
Baolin Liu
Fang Huang
Publication date
01-12-2011
Publisher
Springer US
Published in
Inflammation / Issue 6/2011
Print ISSN: 0360-3997
Electronic ISSN: 1573-2576
DOI
https://doi.org/10.1007/s10753-010-9276-2

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