Document Detail

Cigarette smoke extract-induced adipogenesis in Graves' orbital fibroblasts is inhibited by quercetin via reduction in oxidative stress.
MedLine Citation:
PMID:  23143154     Owner:  NLM     Status:  MEDLINE    
Cigarette smoking is known to aggravate Graves' orbitopathy (GO) severity by enhancing adipogenesis. We investigated the effect of quercetin, an antioxidant, on adipocyte differentiation induced by cigarette smoke extract (CSE) in primary cultured orbital fibroblasts (OFs) from GO patients. Freshly prepared CSE was added to the cells and H(2)O(2) was used as a positive control. Intracellular reactive oxygen species (ROS) generation and adipogenesis were measured. The expressions of proteins peroxisome proliferator-activated receptor (PPAR) γ, CCAAT-enhancer-binding proteins (C/EBP) α and β, and heme oxygenase-1 (HO-1), an antioxidant enzyme, were examined during adipogenic differentiation. In result, CSE and H(2)O(2) dose-dependently stimulated intracellular ROS production in normal and Graves' OFs. The effect of 2% CSE was similar to that of 10 μM H(2)O(2); both concentrations were noncytotoxic and were used throughout the experiment. Quercetin pretreatment reduced the ROS generation stimulated by either CSE or H(2)O(2) in preadipocyte OFs. CSE and H(2)O(2) stimulated adipocyte differentiation in cultured OFs. The addition of quercetin (50 or 100 μM) suppressed adipogenesis. Quercetin also suppressed ROS generation in differentiating OFs during adipogenesis stimulated by CSE and H(2)O(2). Additionally, the expressions of PPARγ, C/EBPα, and C/EBPβ proteins were reduced in the quercetin-treated OFs. Quercetin also reduced the CSE- and H(2)O(2)-induced upregulation of ROS and HO-1 protein in differentiated OFs and preadipocyte OFs. As shown in this study, quercetin inhibited adipogenesis by reducing ROS in vitro, supporting the use of quercetin in the treatment of GO.
Jin Sook Yoon; Hyun Jung Lee; Min Kyung Chae; Sang Yeul Lee; Eun Jig Lee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-01-18
Journal Detail:
Title:  The Journal of endocrinology     Volume:  216     ISSN:  1479-6805     ISO Abbreviation:  J. Endocrinol.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-21     Completed Date:  2013-03-11     Revised Date:  2013-05-31    
Medline Journal Info:
Nlm Unique ID:  0375363     Medline TA:  J Endocrinol     Country:  England    
Other Details:
Languages:  eng     Pagination:  145-56     Citation Subset:  IM    
Departments of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
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MeSH Terms
Adipocytes / cytology,  drug effects
Adipogenesis / drug effects*
Blotting, Western
Cell Proliferation / drug effects
Cells, Cultured
Fibroblasts / cytology,  drug effects*
Graves Disease / metabolism*
Hydrogen Peroxide / pharmacology
Middle Aged
Oxidative Stress / drug effects*
Quercetin / pharmacology*
Reactive Oxygen Species / metabolism
Tobacco Products / adverse effects*
Reg. No./Substance:
0/Reactive Oxygen Species; 117-39-5/Quercetin; 7722-84-1/Hydrogen Peroxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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