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高糖环境对Mu ller细胞谷氨酸转运体及谷氨酰胺合成酶表达的影响
引用本文:张海帆,杨瑾,常翠荣,刘艳丽,贺玮,齐景福. 高糖环境对Mu ller细胞谷氨酸转运体及谷氨酰胺合成酶表达的影响[J]. 生物磁学, 2012, 0(28): 5434-5437
作者姓名:张海帆  杨瑾  常翠荣  刘艳丽  贺玮  齐景福
作者单位:[1]天津医科大学宝坻临床医院,天津301800 [2]天津医科大学眼科中心,天津300384
摘    要:目的:研究高糖环境对原代培养新生7天SD乳鼠视网膜Muller细胞谷氨酸转运合成系统的影响及其可能机制。方法:新生7天SD乳鼠视网膜Muller细胞原代培养并模拟高糖环境构建乳鼠视网膜muller细胞体外高糖环境模型。处理分为3组:对照组,高糖组,高糖+白藜芦醇干预组。培养时间为24h,通过westernblot等检测方法,对照观察各组Muller细胞谷氨酸转运体(GLAST)、谷氨酰胺合成酶(GS)的表达情况。结果:模拟高糖环境可以造成新生SD乳鼠视网膜Muller细胞谷氨酸转运体(GLAST)表达的降低(0.225foldVScontrol,P〈0.05),并导致其表达的谷氨酰胺合成酶(GS)表达水平的显著降低(0.653foldVScontrol,P〈0.05);而干预药物白藜芦醇作用后可明显逆转新生SD乳鼠Mu ller细胞谷氨酸转运体(GLAST)(1.133foldvSHGgroup,P〈0.05)、谷氨酰胺合成酶(GS)(1.720foldVSHGgroup,P〈0.05)等蛋白的表达水平。结论:模拟高糖环境可以影响视网膜M0ller细胞谷氨酸转运体(GLAST)、谷氨酰胺合成酶的表达,其结局可能导致视神经细胞因谷氨酸堆积而导致的兴奋性毒性,白藜芦醇能提高Mcjller细胞谷氨酸转运体(GLAST)、谷氨酰胺合成酶表达,从而保护视神经细胞。

关 键 词:Mu  ller细胞  高糖  谷氨酸转运体  谷氨酰胺合成酶

The Effect of High Glucose on the Expression of Glutamate Transporter and Glutamine Synthetase in Mtdler Cell
Affiliation:ZHANG Hal-fan1, YANG Jin2, CHANG Cui-ron, L1U Yan-li1, HE Wei1, QI ]ing-fu1 (1 Baodl Clinical Hospital, Tianjin Medical University, Tianjin 301800 China; 2 Eye Center, Tianjin Medical University, Tianjin, 300384, China)
Abstract:Objective: To investigate the effect of high glucose on glutamate transporter synthesis system on primary cultured SD rat retinal Mu ller cell (P7) and its possible mechanism. Methods: Primary cultured SD rat retinal M~ ller cell (PT) were treated and set as three groups: Control group, High glucose group, High glucose + Resveratrol group. The expression of GLAST and GS were detected by western blot. Results: The stimulation of glucose decreased the expression of GLAST (0.225 fold vs. control, P〈0.05) and GS (0.653 fold, the VS control, P〈0.05); resveratrol can significantly reverse the expression of GLAST (1.133 fold vs. the HG group, P〈0.05) and GS (1.720 fold vs. the HG the group, P〈0.05). Conclusions: High glucose has effect on the expression of GLAST and GS in retinal Mu ller cells, and this may lead to optic nerve injury caused by excitatory glutamate accumulation. Resveratrol can protect the optic nerve by enhance the expression of GLAST and GS in retinal Mu ller cell.
Keywords:Mu ller cell  High glucose  Glutamate transporter  Glutamine synthetase
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