首页> 中文期刊> 《中国临床医学》 >梗死心肌侧枝血管形成与缺氧诱导因子-1α及血管内皮生长因子A表达水平的关系及临床意义

梗死心肌侧枝血管形成与缺氧诱导因子-1α及血管内皮生长因子A表达水平的关系及临床意义

         

摘要

目的:探讨冠状动脉慢性完全闭塞(chronic total occlusion ,CTO)后梗死心肌中侧枝血管形成与缺氧诱导因子‐1α(hy‐poxia‐inducible factor 1‐alpha ,HIF‐1α)及血管内皮生长因子A(vascular endothelial growth factor A ,VEGF‐A)表达水平的关系及其临床意义。方法:连续收集经冠状动脉造影明确为完全闭塞病变者214例,结合患者的临床表现及(或)影像学资料,确诊为CTO者89例。采用ELISA法检测 HIF‐1α和VEGF‐A的蛋白水平;提取外周血单个核细胞(peripheral blood mono‐nuclear cell ,PBMC),用定量PCR法测定PBMC中VEGF‐A的mRNA水平。采用JMP 9.0和SPSS 18.0统计软件进行统计学处理。结果:比较各组糖尿病患者比例,Rentrop 2级组(11/31,35.5%)和3级组(3/20,15.0%)显著低于0~1级组(18/38,47.4%),P<0.05;比较各组的空腹血糖水平,Rentrop 2级组(6.67±1.41) mmol/L)和3级组(5.48±1.26)mmol/L)显著低于0~1级组(7.24±1.39)mmol/L),P<0.05;比较各组患者中临床心衰(NYHA Ⅱ~Ⅳ级)的比例,Rentrop 2级组(12/31,38.7%)和3级组(3/20,15.0%)显著低于0~1级组(20/38,52.6%),P<0.05;比较各组 HIF‐1α和VEGF‐A的蛋白水平,Rentrop 2级组[(85.5±27.7) pg/mL ,(139.5±42.1) pg/mL]和3级组[(103.3±30.2) pg/mL ,(162.6±43.3) pg/mL]显著高于0~1级组[(42.0±16.1)pg/mL ,(76.5±32.2) pg/mL],P均<0.01;比较各组 HIF‐1α和VEGF‐A的mRNA水平,Rentrop 2级组(1.31±0.46)和3级组(1.38±0.44)VEGF‐A的 mRNA相对表达水平显著高于0~1级组(1.00±0.28), P<0.01。结论:慢性持续缺血、缺氧所导致的HIF‐1α和VEGF表达增加在促进冠状动脉侧枝循环的建立、增加心肌血供、改善预后、减少临床心功能不全的发生率方面具有重要意义。%Objective:The goal of this study was to analyze the clinical significance of relationship between myocardial collateral and the levels of hypoxia‐inducible factor 1‐alpha (HIF‐1α) and vascular endothelial growth factor A (VEGF‐A) in patients with coronary chronic total occlusion lesion .Methods:89 patients with coronary chronic total occlusion lesion confirmed by clin‐ical data and coronary angiography were identified .The levels of HIF‐1αand VEGF‐A were measured by ELISA ,and the rela‐tive expression of VEGF‐A of peripheral blood mononuclear cell (PBMC) were measured by real‐time PCR .The results were statistically analyzed by the statistical programme for social sciences (SPSS version 18 .0) and software SAS JMP 9 .0 .Results:Compared to Rentrop 0‐1 grade group (18/38 ,47 .4% ) ,Rentrop 2 (11/31 ,35 .5% ) and Rentrop 3 (3/20 ,15 .0% ) grade group had fewer diabetes mellitus .Rentrop 2 [(6 .67 ± 1 .41) mmol/L] and Rentrop 3 [(5 .48 ± 1 .26) mmol/L] grade group had low‐er fasting blood glucose than Rentrop 0‐1 grade group [(7 .24 ± 1 .39) mmol/L] .Rentrop 2 (12/31 ,38 .7% ) and Rentrop 3 (3/20 ,15 .0% ) grade group had fewer clinical heart failure (NYHA Ⅱ ~ Ⅳ grade) than Rentrop 0‐1 grade group (20/38 , 52 .6% ) .Rentrop 2 [(85 .5 ± 27 .7) pg/mL ,(139 .5 ± 42 .1) pg/mL] and Rentrop 3 [(103 .3 ± 30 .2) pg/mL ,(162 .6 ± 43 .3) pg/mL] grade group had higher levels of HIF‐1αand VEGF‐A than Rentrop 0‐1 grade group [(42 .0 ± 16 .1) pg/mL ,(76 .5 ± 32 .2) pg/mL] .Rentrop 2 (1 .31 ± 0 .46) and Rentrop 3 (1 .38 ± 0 .44) grade group had higher level of relative expression of VEGF‐A in PBMC than Rentrop 0‐1 grade group (1 .00 ± 0 .28) .Conclusions:Chronic and consistent ischemia and hypoxia in‐duced the increase of expression of HIF‐1αand VEGF‐A is important for establishment of coronary collateral ,increasing blood supply and improving the heart function and prognosis .

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