摘要
背景:最近的研究表明,表没食子儿茶素没食子酸酯(EGCG)有益于各种神经损伤。本研究旨在研究SD大鼠臂丛神经根撕脱术后EGCG的神经保护作用。 方法:将120只SD大鼠随机分为以下3组:EGCG组、撕脱组和Sham组。每组有40只大鼠。EGCG(100mg / kg,i.p.)或生理盐水在损伤后立即给予大鼠。治疗从第1天持续到第7天,并在术后第3天、第7天、第14天和第28天处死动物,用于收获脊髓样本,用于Nissl染色、免疫组织化学(半胱天冬酶-3、p-JNK、p-c-Jun)和蛋白质印迹分析(p-JNK、JNK、p-c-Jun)。 结果:与对照动物相比,EGCG治疗导致第14天和第28天存活的运动神经元百分比显着增加(p<0.05)。在撕脱后第3天和第7天,EGCG处理的动物中半胱天冬酶-3阳性运动神经元的数量明显少于对照动物(p<0.05)。损伤后撕脱组和EGCG治疗组的p-JNK阳性运动神经元数量和p-JNK/JNK比例均无显著差异。EGCG治疗组的p-c-Jun阳性运动神经元数量和p-c-Jun/c-Jun的比例均显著低于损伤后3d和7d的撕脱组(p<0.05)。 结论:EGCG保护动神经元免受臂丛神经根撕裂诱导的细胞死亡,且该作用与抑制c-Jun磷酸化相关。
关键词: 根撕裂,臂丛神经,表没食子儿茶素没食子酸酯,c-Jun磷酸化,运动神经元死亡,EGCG。
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