Objective:To survey the expression of MMP-1,MMP-2 of human periodontal ligament cells(HPDLCs)treated by tea polyphenols(TP)and lipopolysaccharide(LPS).Methods:HPDLCs were in vitro cultured in vitro and treated by TP(200 μg/ml) and /or LPS(100 μg/ml)for 24,48 and 72 h respectively,the secretion of MMP-1 and MMP-2 were examined by ELISA,MMP-1 and MMP-2 mRNA expression was examined by real-time PCR.Results:The secression and mRNA expression of MMP-1 and MMP-2 of HPDLCs increased by LPS treatment and significantly inhibited by TP at the different times.Conclusion:TP can inhibit the col-lagen degradation of HPDLCs mediated by LPS.%目的：观察茶多酚（TP）在脂多糖（LPS）介导下对人牙周膜成纤维细胞（HPDLCs）MMP-1、MMP-2表达的影响。方法：体外培养 HPDLCs，在培养液中添加 TP（200μg/ml）作用于脂多糖（100μg/ml）介导的 HPDLCs，培养24、48、72 h，ELISA法检测 HPDLCs 分泌 MMP-1和 MMP-2的量。荧光实时定量 PCR 法检测 HPDLCs 中 MMP-1和 MMP-2 mRNA 的表达。结果：在 LPS 介导下 HPDLCs MMP-1和 MMP-2分泌量和基因表达升高，TP 可抑制 LPS 介导下 HPDLCs MMP-1和 MMP-2表达。结论：TP 可抑制 LPS 介导的人牙周膜细胞的胶原降解。
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