AIM: To study the roles of matrix metalloproteinase-9 (MMP-9) in the myocardial reperfusion injury.

目的：探讨基质金属蛋白酶- 9 (MMP - 9)在心肌再灌注损伤中的作用。

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Objective To investigate the expression and the significance of cathepsin D(CD) and matrix metalloproteinase-9(MMP-9) in oral squamous cell carcinoma(OSCC).

目的探讨组织蛋白酶D（CD）与基质金属蛋白酶-9（MMP-9）在人类口腔鳞癌（OSCC）中的表达意义。

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Matrix metalloproteinase-9 (MMP-9) is a marker of inflammation, and plasma level of MMP-9 was regarded as one of the indicators in acute coronary syndrome.

基质金属蛋白酶- 9 (MMP - 9)是一种炎症标志物，而血中的MMP - 9已作为急性冠状动脉综合征的指标之一。

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