牛磺酸对弥漫性脑创伤大鼠脑葡萄糖转运体表达的影响

目的: 检测弥漫性脑创伤(DBI)大鼠脑内葡萄糖转运体1(GLUT1)和葡萄糖转运体3(GLUT3)的表达以及牛磺酸对其的影响。方法: SD雄性大鼠随机分为假手术组、脑创伤组、低剂量牛磺酸组(200 mg/kg)和高剂量牛磺酸组(300 mg/kg),连续灌胃给药7 d。建立大鼠DBI模型,脑创伤后24 h,免疫组化和Western blotting检测脑组织中GLUT1和GIUT3蛋白的表达;透射电镜观察大脑皮层神经元超微结构的变化。结果: 各组脑组织中均可见有GLUT1表达的阳性细胞,其表现为在微血管内皮细胞胞浆或胞膜呈棕黄色。与假手术组相比,脑创伤组大鼠脑GLUT1蛋白表达无显著差异;与脑创伤组相比,低、高剂量牛磺酸组脑GLUT1蛋白表达显著增多(P<0.01);且低剂量牛磺酸组脑GLUT1蛋白表达显著高于高剂量牛磺酸组(P<0.05)。各组仅在第三脑室周围可见GLUT3表达的阳性神经元,阳性细胞胞浆或胞膜呈棕黄色。与假手术组相比,脑创伤组大鼠脑GLUT3蛋白表达显著增多(P<0.01);与脑创伤组相比,低、高剂量牛磺酸组脑GLUT3蛋白表达显著增多(P<0.01);且高剂量牛磺酸组脑GLUT3蛋白表达显著高于低剂量牛磺酸组(P<0.01)。低剂量牛磺酸组大脑皮层神经元病理改变明显减轻。结论: 牛磺酸可对DBI大鼠发挥脑保护作用,其机制可能是上调GLUT1和GLUT3蛋白表达,维持脑组织的能量供给。

Effects of taurine on expression of glucose transporters in rat brain with diffused brain injury

AIM: To investigate the effect of taurine on the expression of glucose transporter 1 (GLUT1) and transporter 3(GLUT3) in rat brain with diffused brain injury(DBI). METHODS: Sixty-four male Sprague-Dawley rats were randomly divided into 4 groups: sham-operated group,DBI group,low-dose taurine group(200 mg/kg,ig) and high-dose taurine group(300 mg/kg,ig).After fed with the corresponding drugs for 7 days,the animal model of DBI was made,and the rats were executed 24 h after DBI.The expression of GLUT1 and GLUT...