氧化应力对晶状体一氧化氮和一氧化氮合酶活性的影响

被引:7
作者
庞广仁
丁行振
邓新国
韩秀娴
田小莉
郭慧丽
靳伟民
李建新
机构
[1] 河南省眼科研究所
关键词
氧化应力; 一氧化氮; 一氧化氮合酶; 抗氧化剂;
D O I
暂无
中图分类号
R770.2 [];
学科分类号
100212 ;
摘要
目的 探讨氧化应力、5种抗白内障药物对晶状体一氧化氮合酶 (NOS)活性及一氧化氮 (NO)水平的影响。方法 建立晶状体温育模型 :培养液分 7组 :( 1)对照组含DMEM 10ml;( 2 )~ ( 7)组含DMEM 10ml外尚有 3 0 %H2 O2 0 2ml ,FeCL3 2mg ,并于 ( 3 )~ ( 7)组中分别加入海珠神、麝珠明目、益视安、晶福及视明露滴眼液各 1 0ml ,晶状体制备匀浆上清 ,测NOS ,NO ,MDA。结果  1.正常人、兔、SD鼠晶状体的NOS活性分别为 ( 6 45± 1 5 7)、( 18 0 3± 8 2 0 )、( 13 61± 2 13 )U/mgpro .,人、兔晶状体内均测不出NO ,而SD鼠NO为 ( 5 2 79± 2 0 79) μmol/mgpro .。 2 .氧自由基诱导温育晶状体NOS活性上升 1 5倍 (P <0 0 0 1) ,但晶状体内测不出NO。 3 .抗白内障药物影响NOS活性及NO水平 ,海珠神、麝珠明目、益视安及晶福组与氧化组相比显示抑制NOS活性 ,分别下降 15 % ,9% ,6%及 5 5 % ,而视明露组诱导NOS活性上升 41% (P <0 0 0 1)。 4.氧化组晶状体MDA上升 2 15倍 ,各抗白内障药物组MDA下降至对照组以下 ,证明 5种抗白内障药物都是抗氧化剂。结论 氧自由基诱导晶状体NOS活性上升 ,NO测不出。NO与白内障是否有关尚待深入研究。
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页码:210 / 212
页数:3
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