Effects of TNFalpha and prostaglandin E2 on the expression of MMPs in human periodontal ligament fibroblasts.
Accumulating evidence indicates that TNFalpha plays an important role in the pathogenesis of periodontitis, but the effect of TNFalpha on the degradation of the periodontal ligament is not well understood. This study used reverse transcriptase-PCR to investigate the effects of TNFalpha on matrix metalloproteinase (MMP) mRNA expression in human periodontal ligament fibroblasts. TNFalpha increased MMP-1, MMP-3 and MMP-13 mRNA levels in both a time-dependent (0-24 h) and a dose-dependent (0.1-10 ng/ml) manner. TNFalpha also increased COX-2 mRNA levels. Because elevation of COX-2 mRNA levels enhances the production of prostaglandins, we therefore investigated whether endogenous prostaglandins are involved in the MMP mRNA expression that is enhanced by TNFalpha. Pretreatment with the selective COX-2 inhibitor, NS-398, increased MMP-13 mRNA levels, while prostaglandin E2 and dibutyryl cyclic AMP decreased MMP-13 mRNA levels. Neither MMP-1 nor MMP-3 mRNA levels were affected by these chemicals. These findings indicate that prostaglandin E2 has a lowering effect on TNFalpha-enhanced MMP-13 mRNA levels, and that this effect is dependent on cAMP. Our results suggest that TNFalpha participates in periodontal ligament destruction by stimulating the production of MMPs (MMP-1, MMP-3 and MMP-13), while endogenous prostaglandin E2 has a negative feedback role in TNFalpha-enhanced MMP-13 production.
Department of Basic Science for Health and Nursing, Shiga University of Medical Science, Seta, Otsu, Japan.
Masanori
M
Nishikawa
Yoshinori
Y
Yamaguchi
Kazusada
K
Yoshitake
Yukikazu
Y
Saeki
D000704:Analysis of Variance; D015153:Blotting, Western; D003994:Bucladesine / Q000378:metabolism / Q000494:pharmacology; D002478:Cells, Cultured; D051546:Cyclooxygenase 2; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology; D015232:Dinoprostone / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004591:Electrophoresis, Polyacrylamide Gel; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D015870:Gene Expression; D006801:Humans; D007124:Immunoenzyme Techniques; D007527:Isoenzymes / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D020782:Matrix Metalloproteinases / Q000096:biosynthesis*; D008565:Membrane Proteins; D009578:Nitrobenzenes / Q000494:pharmacology; D010513:Periodontal Ligament / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology*; D011451:Prostaglandin-Endoperoxide Synthases / Q000096:biosynthesis; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013449:Sulfonamides / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors; D007527:Isoenzymes; D008565:Membrane Proteins; D009578:Nitrobenzenes; D012333:RNA, Messenger; D013449:Sulfonamides; D014409:Tumor Necrosis Factor-alpha; C080955:N-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamide; D003994:Bucladesine; D051546:Cyclooxygenase 2; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases; D020782:Matrix Metalloproteinases; D015232:Dinoprostone