Journal Article

<i>In vitro</i> expression of matrix metalloproteinase-1, tissue inhibitor of metalloproteinase-1 and transforming growth factor-ß1 in human periodontal ligament fibroblasts

Dong-Seok Nahm, Hee-Jeong Kim, James Mah and Seung-Hak Baek

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 26, issue 2, pages 129-135
Published in print April 2004 | ISSN: 0141-5387
Published online April 2004 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/26.2.129
In vitro expression of matrix metalloproteinase-1, tissue inhibitor of metalloproteinase-1 and transforming growth factor-ß1 in human periodontal ligament fibroblasts

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Extracellular matrix remodelling is mediated via matrix metalloproteinases (MMPs) and their regulatory factors such as tissue inhibitors of metalloproteinases (TIMPs) and transforming growth factor-ß (TGF-ß). The regulation of MMPs is thought to be associated with cytoskeletal changes. In this study, cytoskeletal changes in human periodontal ligament fibroblasts (PDFs) were induced using cytochalasin B (CB) which reorganizes actin microfilaments reversibly, and colchicine which disrupts microtubules irreversibly. The levels of MMP-1, TIMP-1 and TGF-ß secreted by the CB- or colchicine-treated PDFs were measured using an enzyme-linked immunosorbent assay. Differences between experimental and control groups were tested using analysis of variance (ANOVA) and Scheffé's ad hoc test.

Although CB treatment did not significantly increase MMP-1 expression over the controls, colchicine treatment significantly increased the expression of MMP-1 (P < 0.01) in a time-dependent manner compared with the controls. Both CB and colchicine showed a time-dependent increase in TIMP-1 and TGF-ß1 expression and a dose-dependent increase in TIMP-1 and TGF-ß1 expression until threshold compared with the controls (P < 0.05, P < 0.01 and P < 0.001). In addition, CB treatment produced significantly increased TGF-ß1 expression over the controls (P < 0.05 and P < 0.001) from lower doses, with this effect occurring at earlier time points compared with colchicine treatment.

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Subjects: Restorative Dentistry and Orthodontics

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