CD147在激光诱导的大鼠脉络膜新生血管中的表达

背景 脉络膜新生血管(CNV)是眼底多种疾病的共有病理改变,是造成中心视力严重损害的主要原因之一.基质金属蛋白酶(MMPs)诱导因子CD147能通过旁分泌作用刺激多种细胞MMPs表达,降解细胞间质和基底膜成分,具有促进血管新生作用. 目的 通过建立激光诱导的棕色挪威(BN)大鼠CNV动物模型,观察CD147和血管内皮生长因子(VEGF)在CNV形成过程中的动态表达. 方法 将30只清洁级BN大鼠按照随机数字表法分为正常对照组6只和激光光凝组24只,于光凝后1、7、14和21d通过荧光素眼底血管造影(FFA)观察CNV形成;采用Western blot法分别检测正常对照组和激光光凝后1、7、14和21 d组大鼠视网膜色素上皮(RPE)-脉络膜-巩膜复合物中CD147蛋白相对表达水平的变化;采用ELISA法检测各组大鼠玻璃体腔内VEGF质量浓度变化. 结果 FFA检查显示,激光光凝后7d开始出现盘状荧光素渗漏,激光光凝后14d形成CNV.正常对照组激光光凝前,光凝后1、7、14和21d,大鼠RPE-脉络膜-巩膜复合物中CD147蛋白的相对表达量分别为1.00±0.43、0.97±0.53、0.99±0.45、1.56±0.67和2.27±0.54,玻璃体腔内VEGF质量浓度分别为(72.96±29.95)、(79.36±10.46)、(103.82±32.94)、(166.05±21.54)和(195.64±39.90) pg/ml,总体比较差异均有统计学意义(CD147:F=10.95,P＜0.01;VEGF:F=304.50,P＜0.01);激光光凝后14 d和21 d,大鼠CD147蛋白和VEGF的相对表达量均较正常对照组明显升高,差异均有统计学意义(均P＜0.05).结论 CD147在激光诱导的大鼠CNV中进行性升高,与VEGF的表达趋势一致,CD147可能参与CNV的早期形成,在眼部血管新生中发挥重要作用.

Expression of CD147 in laser-induced rat choroidal neovascularization model

Background The pathology of choroidal neovascularization (CNV) is not clear.CD147 plays a critical role in angiogenesis through activating matrix metalloproteinases (MMPs) and degradation of extracellular matrix (ECM).However,the study of CD147 in CNV is rare.Objective This study was to investigate the expression of CD147 and vascular endothelial growth factor (VEGF) in laser-induced rat CNV model.Methods Thirty clean BN rats were divided into normal control group (six rats) and laser group (24 rats) according to the random number table.CNV was induced on laser photocoagulation group rats using 532 nm multiple-wave length photocoagulation.The development of CNV was followed up by fundus fluorescence angiography (FFA) on 1 day,7,14 and 21 days post-photocoagulation.The expression of C D147 protein in retinal pigment epithelium (RPE)-choroidsclera complex was examined by Western blot in normal control group and 1 day,7,14,21 days post-photocoagulation group.The vitreous VEGF concentrations of those groups were detected by ELISA.Results Disk like fluorescein leakage was detected on 7 days after photocoagulation,and CNV was formed on 14 days after photocoagulation.The expressions of CD147 protein were 1.00 ± 0.43,0.97 ± 0.53,0.99 ± 0.45,1.56 ± 0.67 and 2.27 ± 0.54,and the concentrations of vitreous VEGF were (72.96±29.95),(79.36±10.46),(103.82±32.94),(166.05±21.54) and (195.64± 39.90)pg/ml in normal control group and 1 day,7,14,21 days post-photocoagulation group,with significant differences among the groups (CD147:F=10.95,P＜0.01;VEGF:F=304.50,P＜0.01).The expressions of CD147 and VEGF were significantly higher in the 14,21 days post-photocoagulation groups than those in the normal control group (all at P＜0.05).Conclusions The expression of CD147 increases as the induction of CNV,in accordance with the expression of VEGF.CD147 may play an important role in the early development of CNV.