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首页> 外文期刊>Clinical and diagnostic laboratory immunology >Inhibition of the Activities of Matrix Metalloproteinases 2, 8, and 9 by Chlorhexidine
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Inhibition of the Activities of Matrix Metalloproteinases 2, 8, and 9 by Chlorhexidine

机译:洗必泰对基质金属蛋白酶2、8和9的抑制作用

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Matrix metalloproteinases (MMPs) are a host cell-derived proteolytic enzyme family which plays a major role in tissue-destructive inflammatory diseases such as periodontitis. The aim of the present study was to evaluate the inhibitory effect of chlorhexidine (CHX) on MMP-2 (gelatinase A), MMP-9 (gelatinase B), and MMP-8 (collagenase 2) activity. Heat-denatured type I collagen (gelatin) was incubated with pure human MMP-2 or -9 activated with p-aminophenylmercuric acetate (APMA), and the proteolytic degradation of gelatin was monitored by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Coomassie blue staining. The effect of CHX on MMP-8 activity was also studied with a cellular model addressing the ability of phorbol myristate acetate (PMA)-triggered human peripheral blood neutrophils (polymorphonuclear leukocytes [PMNs]) to degrade native type I collagen. CHX inhibited the activities of both gelatinases (A and B), but MMP-2 appeared to be more sensitive than MMP-9. Adding calcium chloride to the assay mixtures almost completely prevented the inhibition of MMP-9 activity by CHX, while the inhibition of MMP-2 activity could be reversed only when CHX was used at a low concentration. This observation suggests that CHX may act via a cation-chelating mechanism. CHX dose-dependently inhibited collagenolytic activity of MMP-8 released by PMA-triggered PMNs. MMP-8 without APMA activation was inhibited clearly more efficiently than APMA-activated MMP-8. Our study suggests that the direct inhibition of the MMPs’ activities by CHX may represent a new valuable effect of this antimicrobial agent and explains, at least in part, the beneficial effects of CHX in the treatment of periodontitis.
机译:基质金属蛋白酶(MMP)是源自宿主细胞的蛋白水解酶家族,在诸如牙周炎的组织破坏性炎症疾病中起主要作用。本研究的目的是评估洗必太(CHX)对MMP-2(明胶酶A),MMP-9(明胶酶B)和MMP-8(胶原酶2)活性的抑制作用。将热变性的I型胶原蛋白(明胶)与被 p -氨基苯基乙酸汞(APMA)激活的纯人MMP-2或-9孵育,并用十二烷基硫酸钠-钠监测明胶的蛋白水解降解。聚丙烯酰胺凝胶电泳和考马斯亮蓝染色。还使用细胞模型研究了CHX对MMP-8活性的影响,该模型探讨了佛波醇肉豆蔻酸酯乙酸盐(PMA)触发的人外周血中性粒细胞(多形核白细胞[PMNs])降解天然I型胶原的能力。 CHX抑制了两种明胶酶(A和B)的活性,但MMP-2似乎比MMP-9更敏感。向测定混合物中加入氯化钙几乎完全可以防止CHX抑制MMP-9活性,而仅当以低浓度使用CHX时,MMP-2活性的抑制作用才能逆转。该观察结果表明CHX可能通过阳离子螯合机制起作用。 CHX剂量依赖性地抑制了由PMA触发的PMN释放的MMP-8的胶原蛋白水解活性。没有激活APMA的MMP-8明显比激活APMA的MMP-8更有效地被抑制。我们的研究表明,CHX对MMPs活性的直接抑制可能代表了这种抗菌剂的新的有价值的作用,并且至少部分地解释了CHX在治疗牙周炎中的有益作用。

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