摘要
背景:神经元微管(MT)tau蛋白为神经元细胞提供细胞骨架,起着至关重要的作用,包括维持细胞形状,细胞内运输和细胞分裂。 Tau过度磷酸化介导的MT失稳导致轴突病,另外还有神经递质的缺乏,最终导致阿尔茨海默氏病。临床前,链脲佐菌素(3mg / kg,10μl/单侧,ICV)在立体定位上模仿行为和神经化学改变,类似于阿尔茨海默氏tau病理,导致MT组装缺陷进一步导致神经病理级联。 目的:经临床批准的药物,例如多奈哌齐(DNP),卡巴拉汀和美金刚(MEM)仅负责对症治疗,但没有直接与神经元微管失稳相互作用的特定药理干预措施。 方法:目前的研究集中在低剂量(0.5和2 mg / kg)的抗癌药微管稳定剂卡巴他赛,以及与标准药物DNP(5 mg / kg),MEM(10 mg / kg)的联合治疗中)和微管稳定剂Epothilone D(EpoD)(3 mg / kg)预防脑室内链脲佐菌素(ICV-STZ)中毒的微管相关tau蛋白过度磷酸化。结果:CBZ的长期低剂量单独治疗和与标准药物联合治疗均无副作用,并且通过防止神经元细胞骨架的分解,分别显着改善了认知障碍,神经化学改变以及降低了高磷酸化tau的水平。 结论:以上发现提示低剂量的CBZ对ICV-STZ诱导的大鼠微管相关tau蛋白过度磷酸化具有神经保护作用,可能是预防AD的有效药物。
关键词: 阿尔茨海默氏病,tau蛋白过度磷酸化,微管不稳定,卡巴他赛,多奈哌齐,埃博霉素D.
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