大鼠耳蜗组织中Nedd4及SGK1的表达

Expression Patterns of Nedd4 Isoforms and SGK1 in the Rat Cochlea

钟时勋;刘兆华;

1:重庆医科大学附属第一医院耳鼻咽喉科

2:第三军医大学附属大坪医院耳鼻咽喉科

摘要
目的研究大鼠耳蜗组织中神经前体细胞表达-发育性下调基因亚型(neural precursor cell-ex-pressed,developmentally downregulated isoforms,Nedd4)及血清糖皮质激素诱导激酶1(serum glucocorticoid-in-ducible kinase1,SGK1)蛋白分子的表达。方法选取健康Wistar大鼠8只,用特异性多克隆兔抗鼠Nedd4-1/2、Nedd4-2及SGK1抗体,采用免疫组化法研究大鼠耳蜗组织中Nedd4-1/2、Nedd4-2及SGK1蛋白的表达模式。结果Nedd4-1/2、Nedd4-2及SGK1蛋白广泛表达于大鼠耳蜗组织的各个区域中,包括血管纹、螺旋韧带、Corti器、螺旋缘、螺旋神经节、前庭膜等处。结论在耳蜗组织中,存在一个由SGK1、Nedd4和上皮钠通道(ENaC)组成的Na+转运系统,它们协同作用转运Na+,从而保持内耳内环境的稳定。
关键词
内淋巴;耳蜗;血清糖皮质激素诱导激酶1;神经前体细胞表达-发育性下调基因亚型
基金项目(Foundation):
重庆医科大学科研基金资助项目(XBYB2007015)
作者
钟时勋;刘兆华;
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