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聚乳酸-聚乙醇酸-聚乙二醇血管支架置入对兔动脉粥样硬化模型血清基质金属蛋白酶2,9的影响

邢 王月1,迟宝荣2*,李淑梅1,景瑕斌3,孟晓萍1   

  1. 1.吉林大学第二医院心内科,吉林 长春130041;2.吉林大学第一医院消化内科,吉林 长春130021;3. 中国科学院长春应化所高分子物理化学国家重点实验室,吉林 长春130022
  • 收稿日期:2005-07-15 修回日期:1900-01-01 出版日期:2006-03-28 发布日期:2006-03-28
  • 通讯作者: 迟宝荣2*

Effects of polylactic acid-polyglycolic acid-polyethylene stent on matrix metalloproteinase 2,9 in rabbits with atherosclerosis

XING Yue1,CHI Bao-rong2*,LI Shu-mei1,JING Xia-bin3,MENG Xiao-ping1   

  • Received:2005-07-15 Revised:1900-01-01 Online:2006-03-28 Published:2006-03-28
  • Contact: CHI Bao-rong2*

摘要: 目的:探讨生物可降解聚乳酸-聚乙醇酸-聚乙二醇(PLGA-PEG)血管支架置入对兔动脉粥样硬化模型的血清基质金属蛋白酶2,9(MMP-2、MMP-9)的影响。方法:成年健康白兔30只,经球囊血管内膜剥脱法制成髂动脉动脉粥样硬化动物模型,喂养6周后,随机分为两组,实验组(PLGA-PEG组,n=15),给予血管支架(PLGA-PEG)置入,对照组(n=15)常规喂养。两组动物在支架置入前、置入后7及30 d分别收集耳缘静脉血1 mL, 以SDS-PAGE Zymography法检测MMP-2、MMP-9)及相应酶原(pro MMP-2和pro MMP-9)。结果:实验组支架置入前所测的MMP-2、MMP-9和proMMP-2(11 568±2 219)、(10 364±1 429和(13 649±1 894)INT·mm2)明显高于对照组(6 128±1 562)、(8 519±2 167)和(8 413±2 156)INT·mm2(P<0.05);但proMMP-2两组比较,差异无显著性(P>0.05)。实验组支架置入后7 d与置入前相比,MMP-2及MMP-9以及相应酶原虽有增高趋势,但差异无显著性(P>0.05);支架置入30 d后MMP-2及酶原高于置入前(13 935±2 167)、(15 628±1 739)INT·mm2 vs (11 568±2 219)、(13 649±1 894)INT·mm2(P<0.01),MMP-9及酶原亦增高,但差异无显著性(P>0.05)。结论:血清MMP-2及酶原在动脉硬化动物模型中明显增高,血管支架置入后MMP-2增高。

关键词: 明胶酶A, 明胶酶B

Abstract: Objective To investigate the effects of polylactic acid-polyglycolic acid-polyethylene (PLGA-PEG) stent on matrix metalloproteinase (MMPs) in rabbits with atherosclerosis. Methods 30 adult healthy rabbits were divided randomly into two groups:control group (n=15) and PLGA-PEG group (n=15). Right iliac arteries of rabbits of PLGA-PEG group were injured by balloon denuded endothelization. PLGA-PEG stents were implanted in rabbits in PLGA-PEG group. MMP-2,9 and pro MMP-2,9 levels of PLGA-PEG group were determined before implantation,7 and 30 d later by SDS-PAGE zymography. MMP-2,9 and pro MMP-2,9 levels were determined in control groups. Results The concentrations of MMP-2,9 and pro MMP-2 in PLGA-PEG group were much higher than those in control group (11 568±2 219,10 364±1 429,13 649±1 894 INT·mm2 vs 6 128±1 562,8 519±2 167,8 413±2 156 INT·mm2,P<0.05). There were no significant differences of pro MMP-9 between two groups (P>0.05). In PLGA-PEG group, the levels of MMP-2,9 and pro MMP-2,9 didn′t elevate significantly 7 d later (P>0.05). However the MMP-2 and pro MMP-2 concentrations were still higher 30 d after implantation (13 935±2 167,15 628±1 739 INT·mm2 vs 11 568±2 219,13 649±1 894 INT·mm2,P<0.01). Conclusion The serum levels of MMP-2 and pro MMP-2 increase significantly in rabbits with atherosclerosis. The MMP-2 level also increases after implantation.

Key words: gelatinase A, gelatinase B

中图分类号: 

  • R541.4