Document Detail

Increased tissue inhibitor of metalloproteinase-1 expression and inhibition of gelatinase A activity in buccal mucosal fibroblasts by arecoline as possible mechanisms for oral submucous fibrosis.
MedLine Citation:
PMID:  11854068     Owner:  NLM     Status:  MEDLINE    
Oral submucous fibrosis (OSF) is a pre-malignant fibrotic lesion of the mouth in areca quid chewers. It is probably a consequence of disturbances in the hemeostatic equilibrium between synthesis and degradation of extracellular matrix molecules (ECM). To date, there has been little research about the role of tissue inhibitors of metalloproteinase (TIMPs) and matrix metalloproteinases (MMPs) in the pathogenesis of OSF. In the present study, we examined the activity of TIMPs from cells cultured from OSF and normal buccal mucosa. OSF specimens were found to have higher TIMP-1 expression than normal buccal mucosal fibroblasts (BMFs) by Western blots. To verify whether arecoline, a major areca nut alkaloid, could affect TIMP or MMP production by human BMFs, Western blots and gelatine zymography were used. Arecoline was found to elevate TIMP-1 expression at the concentration level under 20 microg/ml in a dose-dependent manner. The amount of TIMP-1 was about 2.7 fold at a concentration level of 10 microg/ml compared with control. From gelatin zymograms, the main gelatinolytic proteinase secreted by the human BMFs was MMP-2, and only minimal amounts of MMP-9 could be detectable from zymogram. In addition, arecoline was found to inhibit MMP-2 secretion and production at the concentration level of 40 microg/ml. The gelatinolytic activity of MMP-2 was about 54% at a concentration level of 80 microg/ml compared with control. Taken together, it was found that arecoline acted not only as an inhibitor on gelatinolytic activity of MMP-2, but also a stimulator for TIMP-1 activity. These synergistic effects may contribute to the ECM components accumulation in the areca quid associated OSF.
Yu-Chao Chang; Shun-Fa Yang; Kuo-Wei Tai; Ming-Yung Chou; Yih-Shou Hsieh
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Oral oncology     Volume:  38     ISSN:  1368-8375     ISO Abbreviation:  Oral Oncol.     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-03-07     Completed Date:  2002-04-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9709118     Medline TA:  Oral Oncol     Country:  England    
Other Details:
Languages:  eng     Pagination:  195-200     Citation Subset:  IM    
Department of Dentistry, Chung Shan Medical and Dental College Hospital, Taichung, Taiwan.
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MeSH Terms
Arecoline / pharmacology*
Cells, Cultured
Dose-Response Relationship, Drug
Fibroblasts / drug effects,  enzymology
Matrix Metalloproteinase 2 / antagonists & inhibitors*,  metabolism
Mouth Mucosa / cytology,  drug effects*,  enzymology
Oral Submucous Fibrosis / chemically induced*,  enzymology
Tissue Inhibitor of Metalloproteinase-1 / metabolism*
Reg. No./Substance:
0/Tissue Inhibitor of Metalloproteinase-1; 63-75-2/Arecoline; EC Metalloproteinase 2

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

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