大鼠实验性脑出血后基质金属蛋白酶2和9的表达
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The Expression of Matrix Metalloproteinase-2 and Matrix Metalloproteinase-9 in Rats After Intracerebral Hemorrhgae
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    摘要:

    目的探讨大鼠脑出血后基质金属蛋白酶2和基质金属蛋白酶9的表达及其意义。方法采用未抗凝新鲜自体股动脉血注入大鼠尾状核建立脑出血动物模型。用酶谱分析法测定脑出血后6h、12h、24h、3天、6天、10天和15天时基质金属蛋白酶2和基质金属蛋白酶9的表达。结果基质金属蛋白酶2在脑出血后24h开始表达(p<0.05),第6天时达高峰(p<0.01),到第10天仍维持高水平表达(p<0.05);而基质金属蛋白酶9在脑出血后6h开始表达(p<0.05),24h~3天最明显(p<0.01),此后活性逐渐降低,第10天时的活性仍高于对照组(p<0.05),15天时不再表达。结论脑出血后6h~3天出血灶周围脑组织中基质金属蛋白酶9的活性增高,可能与急性期脑水肿的形成有关,而基质金属蛋白酶2的迟发表达可能参与了脑组织的修复过程。

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    Aim To investigate the expression of matrix metalloproteinase-9 (MMP-9) and matrix metalloproteinase-2 (MMP-2) in rats following intracerebral hemorrhage(ICH). Methods ICH model was produced by stereotactically infusing 75 μL autologous fresh blood taken from rat femoral artery into the left caudate nucleus. The expression of MMP-2 and MMP-9 was detected by zymogram analysis over a time course ranging from 6 hours to 15 days. Results The expression of MMP-2 and MMP-9 in the hemorrhage site increased progressively over time after ICH. After 6 hours, significant (p<0.05) MMP-9 activity reached maximum levels by 24 hours (p<0.01), then persisted for 3 days at this level and returned based level (zero) by 15 days. MMP-2 was significantly (p<0.05) increased by 24 hours and was maximum after 5 days following ICH. Conclusions These results demonstrated that early increased MMP-9 expression was a significant responses to ICH; MMP-2 may contribute to brain tissue repairing.

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田力,刘海峰,滕伟禹.大鼠实验性脑出血后基质金属蛋白酶2和9的表达[J].中国动脉硬化杂志,2006,14(3):221~223.

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  • 收稿日期:2005-05-16
  • 最后修改日期:2006-01-13
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