氟伐他汀对血管球囊损伤后MMP-9和TIMP-2表达的影响

Effects of Fluvastatin on Expressions of MMP-9 and TIMP-2 after Injury of Blood Balloon

目的 探讨氟伐他汀抑制再狭窄的作用机制。方法 将 48只大白兔随机分为 3组 ,正常对照组 :喂饲基础饲料 ;单纯球囊损伤组 :喂饲基础饲料 +球囊损伤右颈总动脉 ;氟伐他汀干预后球囊损伤组 :喂饲基础饲料 +氟伐他汀 10mg·kg-1 ·d-1 +球囊损伤右颈总动脉。各组又分为 3d、7d、14d、3 0d组 ,分别于第 3d、7d、14d、3 0d采用原位杂交方法检测血管损伤后基质金属蛋白酶 -9(MMP -9)和金属蛋白酶组织抑制剂 -2 (TIMP -2 )mRNA表达情况。结果 MMP -9和TIMP -2mRNA在正常对照组几乎不表达 ;血管损伤后中膜第 3d开始表达 ,第 7d达高峰 ,第 14d、3 0d内膜有少量表达 ,氟伐他汀干预后MMP -9明显降低 (P <0 0 5 ,P <0 0 1) ,但TIMP -2mRNA表达无明显变化。结论 氟伐他汀可通过减少血管损伤后基质金属蛋白酶 -9的表达 ,抑制平滑肌细胞增殖、迁移 。

Objective To explore the effect and mechanism of fluvastatin preventing and curing restenosis. Methods 48 rabbits were randomly divided into 3 groups. In control group, rabbits were given basic food. In balloon injury group, rabbits were given basic food and balloon injury of general artery on right neck. In fluvastatin balloon group, rabbits were given basic food,ballon injury of general artery and 10mg·kg -1 ·d -1 fluvastatin. The expression of MMP-9 and TIMP-2 of mRNA was detected at 3, 7, 14 and 30 days after injury respectively by method of in site hybridization. Results There was little expression of MMP-9 and TIMP-2 mRNA in control group, and the expression of MMP-9 and TIMP-2 mRNA in middle membrane of blood vessels began at 3 days after blood injury, and reached maximum at 7 days after injury. There was a little expression of MMP-9 and TIMP mRNA in inner membrane of blood vessels at 14 and 30 days after injury, and MMP-9 expression significantly decreased after the fluvastatin interference(P<0 05,P<0 01), but there was no significant change in TIMP-2 mRNA expression. Conclusion Fluvastatin can reduce the MMP-9 expression after blood injury, and inhibit the reproduction and migration of vscular smooth muscle to prevent and cure restenosis.