天麻素干预甲基苯丙胺依赖大鼠星形胶质细胞、神经元变化及炎性因子IL-6、TNF-α的表达
Expression of Astrocyte, Neuron, and Proinflammatory Cytokines Derived from Frontal Cortex of Methamphetamine Dependent rats after Gastrodin Administration
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摘要: 目的 探讨天麻素对甲基苯丙胺 (MA) 依赖大鼠神经毒性损伤的治疗作用及其机制.方法 48只健康雄性SD大鼠随机分为3组, 每组16只.对照组 (ip生理盐水, 共8周) ;MA组 (连续4周每日1次ip给予MA 10 mg/kg;而后连续4周每日1次ip给予生理盐水) ;天麻素组 (连续4周每日1次ip给予MA 10 mg/kg;而后连续4周每日1次ip给予天麻素10 mg/kg) .采用刻板行为评分检测大鼠行为学变化;采用免疫荧光技术检测大鼠额叶皮质胶质纤维酸性蛋白 (GFAP) 和神经元核蛋白 (NEUN) 的表达;采用RT-PCR和Western蛋白印迹法检测白介素6 (IL-6) 和肿瘤坏死因子α (TNF-α) 的表达变化.结果 MA组与对照组比较, 刻板行为评分显著升高 (P<0.01) , 天麻素组与MA组比较, 刻板行为评分显著降低 (P<0.01) .与对照组比较, MA组GFAP的表达增加, NEUN的表达减少;天麻素组与MA组比较, GFAP表达显著降低, NEUN表达增加.MA组与对照组比较, IL-6、TNF-α的表达均有不同程度增高, 差异有统计学意义 (P<0.01) , 天麻素组与MA组比较, IL-6、TNF-α的表达显著降低 (P<0.01) .结论 甲基苯丙胺依赖所致大鼠神经功能损害可能与星形胶质细胞活化及IL-6、TNF-α等炎性因子的高表达有关;天麻素可通过降低星形胶质细胞活化和降低IL-6、TNF-α的表达改善甲基苯丙胺依赖所致神经功能损害.Abstract: Objective To observe the curative mechanism and effect of neurotoxicity injury induced by methamphetamine (MA) and the neuroprotective effects of gastrodin interfered. Whether the expression of astrocyte and proinflammatory cytokines has contributed to the effects of gastrodin.Me thods 48 healthy male SD rats were randomly divided into three groups: control group (Daily intraperitoneal injection of saline for 8 weeks) , MA group (A dose of 10 mg/kg MA was administered every day for four weeks, then given daily intraperitoneal injection with10 mg/kg saline for 4 weeks) and gastrodin group (A dose of 10 mg/kg MA was administered every day for four weeks, then given daily intraperitoneal injection with 10 mg/kg gastrodin for 4 weeks) . The behavioral changes of rats were measured by conditioned place preference ( CPP) and sterotyped behavior ( SB) induced by methamphetamine. Immunofluorescence staining was used to detect the expression of glial fibrillary acidic protein (GFAP) and NEUN in rat frontal cortex.The expression of IL-6 and TNF-α were detected by quantity RT-PCR and westrn bloting.Re s ults Compa MA depndent 4 weeks group with control group, the scores of sterotyped behavior of MA depndent groups had signficantly increased (P <0.01) . Comparing MA depndent 4 weeks group with MA depndent 4 weeks+gastrodin group, the scores of sterotyped behavior of MA dependent 4 weeks group had obviously decreaseed (P<0.01) . Compared with the control group, the expression of GFAP of MA dependent 4 weeks group decreased and the expression of NEUN increased. Compared MA dependent 4 weeks group with control group, the expression of IL-6 and TNF-α increased (P < 0.01) . Compared MA dependent 4 weeks+gastrodian group with MA dependent 4 weeks group, the expression of TNF-α and IL-6 significantly reduced (P < 0.01) .Conclus ion The neurological damage induced by methamphetamine might be related to the activation of astrocytes and the high expression of inflammatory cytokines including IL-6 and TNF-α. Gastrodin could abate the neurological injury of methamphetamine dependence via reducing the activation of astrocytes and decreasing the expression of IL-6 and TNF-α.
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Key words:
- Gastrodin /
- Methamphetamine /
- Astrocyte /
- Neuron /
- Proinflammatory cytokines
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