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大鼠脉络膜新生血管色素上皮衍生因子、血管内皮生长因子、血管生成素-2的表达 被引量:3

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摘要 目的探讨大鼠脉络膜新生血管(DNV)组织色素上皮衍生因子(PEDF)和血管内皮生长因子(VEGF)、血管生成素-2(Ang-2)表达,探讨它们在CNV中的作用机制。方法应用氪激光光凝视网膜制备BN大鼠脉络膜新生血管(CNV)模型,随机分为6组,分别在光凝后1,3,7,14,21,28 d行荧光素眼底血管造影(FFA)后摘除眼球。应用实时荧光定量反转录PCR及免疫组化(SP)法检测各组大鼠光凝区和正常视网膜中PEDF、VEGF和Ang-2 mRNA和蛋白的表达,并对结果进行分析。结果光凝后3 d激光损伤区PEDF mRNA和蛋白表达程度最高,与其他各组比较差异显著(均P<0.05),其后表达逐渐下降;光凝后14 d CNV增殖区VEGF表达程度最高,与其他各组比较差异显著(均P<0.05);7 d时Ang-2表达程度最高,与其他各组比较差异显著(均P<0.05)。结论 PEDF表达不足可能是CNV形成和增殖一个主要原因,VEGF与PEDF表达失衡可能在CNV形成过程中起重要调控作用。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2012年第4期775-777,共3页 Chinese Journal of Gerontology
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