摘要
目的:探讨甘草苷对吗啡引起神经损伤的调节作用及机制.方法:采用侧脑室注射吗啡建立神经损伤模型;腹腔注射甘草苷5d和10 d,采用病理学观察、蛋白免疫印迹、细胞活力、凋亡及原代神经元分化检测.结果:吗啡处理之后,皮层组织中神经元减少,原代神经元细胞相对活力下降,凋亡数目增加,轴突断裂和胞体缩小;甘草苷给药后,细胞活力显著改善;轴突、树突及胞体结构逐渐完整,细胞凋亡情况减轻;蛋白Akt在473位点和PKA在197位点的磷酸化水平下降,自噬相关蛋白Becline和LC3B1/2不变.结论:甘草苷显著抑制吗啡引起的神经元分化抑制和神经元凋亡,这些作用可能是通过甘草苷协同吗啡对Akt通路.
Abstract
AIM:To investigate the regulatory ef-fects and mechanisms of glycyrrhizin on morphine-induced neurotoxicity.METHODS:A neurotoxicity model was established by intracerebroventricular injection of morphine.Glycyrrhizin was adminis-tered intraperitoneally for 5 and 10 days.Pathologi-cal observation,protein immunoblotting,cell viabil-ity,apoptosis,and primary neuron differentiation were assessed.RESULTS:After morphine treat-ment,neuronal loss,decreased cell viability,in-creased apoptosis,axonal breakage,and cell shrink-age were observed in cortical tissue.Glycyrrhizin administration significantly improved cell viability,and axonal,dendritic,and cell body structures gradually became intact,with reduced apoptosis.The phosphorylation levels of protein Akt at posi-tion 473 and PKA at position 197 decreased,while autophagy-related proteins Beclin and LC3B1/2 re-mained unchanged.CONCLUSION:Glycyrrhizin sig-nificantly inhibits morphine-induced neuronal dif-ferentiation suppression and neuronal apoptosis,which may be mediated through the synergistic ef-fects of glycyrrhizin and morphine on the Akt path-way.
维普
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