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• W2116752832 startingPage "167" @default.
• W2116752832 abstract "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." @default.
• W2116752832 created "2016-06-24" @default.
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• W2116752832 date "2002-05-28" @default.
• W2116752832 modified "2023-10-16" @default.
• W2116752832 title "Effects of TNFα and prostaglandin E₂on the expression of MMPs in human periodontal ligament fibroblasts" @default.
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• W2116752832 doi "https://doi.org/10.1034/j.1600-0765.2002.00656.x" @default.
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