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Shikonin inhibits adipogenesis by modulation of the WNT/β-catenin pathway.
MedLine Citation:
PMID:  21146546     Owner:  NLM     Status:  Publisher    
AIM: Our previous study showed for the first time that shikonin, a natural compound isolated from Lithospermun erythrorhizon Sieb. Et Zucc, inhibits adipogenesis and fat accumulation. This study was conducted to investigate the molecular mechanism of the anti-adipogenic effects of shikonin. MAIN METHODS: Gene knockdown experiments using small interfering RNA (siRNA) transfection were conducted to elucidate the crucial role of β-catenin in the anti-adipogenic effects of shikonin. KEY FINDINGS: Shikonin prevented the down-regulation of β-catenin and increased the level of its transcriptional product, cyclin D1, during adipogenesis of 3T3-L1 cells, preadipocytes originally derived from mouse embryo. β-catenin was a crucial mediator of the anti-adipogenic effects of shikonin, as determined by siRNA-mediated knockdown. Shikonin-induced reductions of the major transcription factors of adipogenesis including peroxisome proliferator-activated receptor γ and CCAAT/enhancer binding protein α, and lipid metabolizing enzymes including fatty acid binding protein 4 and lipoprotein lipase, as well as intracellular fat accumulation, were all significantly recovered by siRNA-mediated knockdown of β-catenin. Among the genes located in the WNT/β-catenin pathway, the levels of WNT10B and DVL2 were significantly up-regulated, whereas the level of AXIN was down-regulated by shikonin treatment. SIGNIFICANCE: This study clearly shows that shikonin inhibits adipogenesis by the modulation of WNT/β-catenin pathway in vitro, and also suggests that WNT/β-catenin pathway can be used as a therapeutic target for obesity and related diseases using a natural compound like shikonin, even though the in vivo effects of shikonin and its clinical significance remain to be elucidated.
Haeyong Lee; Sungmin Bae; Kijeong Kim; Wonyong Kim; Sang-In Chung; Young Yang; Yoosik Yoon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-12-10
Journal Detail:
Title:  Life sciences     Volume:  -     ISSN:  1879-0631     ISO Abbreviation:  -     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2011-1-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375521     Medline TA:  Life Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Department of Microbiology, Chung-Ang University College of Medicine, Seoul 156-756, Korea.
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