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Expression of Insulin Signaling Transmitters and Glucose Transporters at the Protein Level in the Rat Testis

机译:大鼠睾丸中蛋白质水平的胰岛素信号转导和葡萄糖转运蛋白的表达

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Insulin receptor substrate (IRS) proteins are key mediators in insulin signaling from the insulin receptor. It takes place through receptor-mediated tyrosine phosphory lation of IRS proteins. The aim of the present article is to demonstrate the distribution of IRS 1-3, glucose transporters 1—4 (GLUT 1—4), signal regulatory protein 1α (SIRP1α), PKB, and PI 3-kinase in the rat testis to see if signal transduction medi ated by these proteins is active in testicular cells. Wistar rats were used as donors of testis tissue. Expression of these genes was studied at the pro tein level by using immunohistochemistry and Western blotting. IRS-1, IRS-2, GLUT 1, GLUT 2, GLUT 3, and SIRP1α were strongly expressed in the Sertoli cells (except GLUT 1), early spermatocytes, peritubular myoid cells, macrophage-like interstitial cells, and testicular endothelial cells in all the testes investigated by immunohistochemistry. IRS-2 was also expressed in the Leydig cells. Immunoblotting experiments demon strated the presence of about 26-67 kDa reactive with anti- IRS-1, IRS-2, GLUT 1, GLUT 2, GLUT 3, PKB, and SIRP1α. The present results sug gest that proteins like insulin and certain cytokines using IRS-1, IRS-2, GLUT 1, GLUT 2, GLUT 3, PKB, and SIRP1α in their signal trans duction can have effects on the different types of testicular cells in the rat.
机译:胰岛素受体底物(IRS)蛋白是来自胰岛素受体的胰岛素信号传导的关键介质。它通过受体介导的IRS蛋白质酪氨酸磷酸化而发生。本文的目的是证明IRS 1-3,葡萄糖转运蛋白1-4(GLUT 1-4),信号调节蛋白1α(SIRP1α),PKB和PI 3-激酶在大鼠睾丸中的分布这些蛋白质介导的信号转导在睾丸细胞中是否活跃。 Wistar大鼠用作睾丸组织的供体。通过使用免疫组织化学和蛋白质印迹,在蛋白质水平上研究了这些基因的表达。 IRS-1,IRS-2,GLUT 1,GLUT 2,GLUT 3和SIRP1α在Sertoli细胞(GLUT 1除外),早期精母细胞,肾小管周围肌样细胞,巨噬细胞样间质细胞和睾丸内皮细胞中强烈表达。通过免疫组织化学检查所有睾丸。 IRS-2也在Leydig细胞中表达。免疫印迹实验表明,与抗IRS-1,IRS-2,GLUT 1,GLUT 2,GLUT 3,PKB和SIRP1α发生反应时,存在约26-67 kDa的反应。目前的结果表明,在信号转导中使用IRS-1,IRS-2,GLUT 1,GLUT 2,GLUT 3,PKB和SIRP1α的蛋白质,如胰岛素和某些细胞因子,可能会对不同类型的睾丸细胞产生影响。那只老鼠。

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