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SD、E3与DA1U大鼠视网膜光损伤敏感性的差异研究
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SD、E3与DA1U大鼠视网膜光损伤敏感性的差异研究
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Journal Article
SD、E3与DA1U大鼠视网膜光损伤敏感性的差异研究
2012
Overview
目的比较SD、E3与DA1U大鼠视网膜光损伤敏感性,为构建不同品系大鼠视网膜光损伤模型和研究眼底色素抗光损伤保护视网膜的相关机制研究提供实验依据。方法成年SD、E3、DA1U大鼠,雌雄随机选取,采用视网膜电图与HE染色分别检测正常情况下与光损伤后不同品系大鼠视网膜感光功能与组织形态变化,采用TUNEL染色观察光损伤后视网膜凋亡细胞的分布与数量。结果正常状态下,SD大鼠色素上皮层、脉络膜层及E3大鼠色素上皮层均无色素分布,而E3大鼠脉络膜层、DA1U大鼠色素上皮层与脉络膜层有褐色色素分布;HE结果显示,在正常状态下,3种品系大鼠视网膜外核层厚度没有显著差异,而在光损伤条件下,SD大鼠视网膜各层细胞均严重受损;视网膜电图结果显示,在正常状态下,不同品系大鼠间视网膜电图视杆细胞反应b波振幅存在显著差异,E3大鼠最大混合反应a波及b波振幅与SD大鼠相比有显著差异,而在光损伤条件下,与SD大鼠相比,E3和DA1U大鼠视网膜电图a波与b波的波幅降幅显著减弱;TUNEL染色结果显示,与SD大鼠相比,E3与DA1U大鼠视网膜内核层及外核层凋亡细胞分布范围与数量均显著下降。结论 SD、E3与DA1U大鼠间存在视网膜色素分布与光...
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