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1. 儿童发育疾病研究省部共建教育部重点实验室、儿科学重庆市重点实验室、重庆市儿童发育重大疾病诊治与预防国际科技合作基地,重庆,400014
2. 重庆医科大学附属儿童医院心脏中心,重庆,400014
纸质出版日期:2014,
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司菲菲, 刘芮汐, 宋思捷, 等. 抵抗素调节人冠状动脉内皮细胞MMP-9表达机制探讨[J]. 重庆医科大学学报, 2014,38(5):666-670.
Si Feifei, Liu Ruixi, Song Sijie, et al. Effect of resistin on MMP-9 in human coronary artery endothelial cells[J]. Journal of Chongqing Medical University, 2014,38(5):666-670.
目的:探讨抵抗素调节冠状动脉内皮细胞中基质金属蛋白酶(matrixmetalloproteinases,MMP)-9的表达及其机制。方法:用含1%胎牛血清(fetal bovine serum,FBS)的DMEM/F12培养基培养人冠状动脉内皮细胞(human coronary artery endothelial cells,HCAECs)16 h(血清饥饿培养),之后随机分为6组:(1)空白对照(Con)组:无抵抗素干预;(2)Res20组:抵抗素20 ng/ml干预;(3)Res40组:抵抗素40 ng/ml干预;(4)Res100组:抵抗素100 ng/ml干预;(5)Res40+U0126组:细胞中加入细胞外信号调节激酶(extracellular signal-regulated kinase,ERK)抑制剂U0126(20 mmol/L)预处理1 h,再加入抵抗素40 ng/ml干预;(6)U0126组:细胞中仅加入ERK抑制剂U0126(20 mmol/L),细胞各组干预24 h后,用RT-PCR法检测MMP-9和蛋白酶抑制剂(tissue inhibitor of metalloproteinase,TIMP)-1 mRNA表达,ELISA法检测MMP-9和TIMP-1蛋白水平,Western blot检测HCAECs p-ERK1/2及ERK1/2的蛋白表达。结果:3种浓度抵抗素干预HCAECs 24 h后,MMP-9 mRNA与蛋白水平均较空白组明显升高(P<0.05);TIMP-1 mRNA与蛋白水平均较空白组明显降低(P<0.05)。40 ng/ml抵抗素干预组加入ERK抑制剂U0126后,MMP-9 mRNA与蛋白水平明显下降(P<0.05),TIMP-1 mRNA与蛋白无明显变化。与Con组、U0126组及Res40+U0126组相比,Res40组p-ERK1/2蛋白表达明显增高(P<0.05)。结论:抵抗素可诱导HCAECs MMP-9的生成,可能通过下调TIMP-1的表达及激活ERK通路参与这一过程。
Objective:To investigate the expression of matrixmetalloproteinases-9(MMP-9) in human coronary artery endothelial cells (HCAECs) and to explore its underlying mechanism. Methods:HCAECs were incubated by 1% fetal bovine serum(FBS) in DMEM/F12 culture medium in six different group:(1)blank control(Con)group:without resistin;(2)Res20 group:with 20 ng/ml resistin;(3)Res40 group:with 40 ng/ml resistin;(4)Res100 group:with 100 ng/ml resistin;(5)Res40+U0126 group:incubating HCAECs with ERK inhibitor U0126 (20 mmol/L) pretreatment for 1 h ,then adding 40 ng/ml resistin;(6)U0126 group:with ERK inhibitor U0126 (20 mmol/L). After 24 h,MMP-9 and tissue inhibitor of metalloproteinase-1(TIMP-1) mRNA and protein levels were measured by RT-PCR and ELISA. HCAECs p-ERK1/2 and ERK1/2 protein levels were measured by Western blot. Results:Compared with those in Con group,MMP-9 mRNA and protein levels were increased in Res20,Res40,Res100 groups(P<0.05) and TIMP-1 mRNA and protein levels were decreased(P<0.05). MMP-9 mRNA and protein levels in Res 40+U0126 group were lower than those in Res40 group(P<0.05) while there is no obvious change of TIMP-1 mRNA and protein levels. Compared with those in Con group,U0126 and Res40+U0126 group,p-ERK1/2 protein levels were higher in Res40 group(P<0.05). Conclusions:Expression of resistin can down-regulate the TIMP-1 and induce MMP-9 synthesis. The ERK1/2 is involved in MMP-9 expression in HCAECs exposed to re-sistin. These results suggest an active role of resistin in the pa-thophysiology of resistin-induced cardiovascular disease.
抵抗素基质金属蛋白酶-9蛋白酶抑制剂-1人冠状动脉内皮细胞
resistinmatrixmetalloproteinases-9tissue inhibitor of metalloproteinasehuman coronary artery endothelial cells
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