阿尔茨海默病发病机制被找到

2017-11-06 佚名 人民网

阿尔茨海默病是一种渐进性发展的中枢神经系统致死性退行性疾病,也是威胁老年人生命健康的四大杀手之一。

阿尔茨海默病俗称老年痴呆症。记者5日从南通大学获悉,该校神经再生重点实验室刘飞教授领衔的“tau代谢与老年性痴呆”研究团队,TDP-43蛋白的病变可能通过影响tau mRNA的代谢加工,在阿尔茨海默病发生发展中起重要作用。

阿尔茨海默病是一种渐进性发展的中枢神经系统致死性退行性疾病,也是威胁老年人生命健康的四大杀手之一。据统计,2015年全球老年痴呆患者为4680万人;2030年将达到7470万人,而2050年将突破1.315亿人。该病目前尚无有效治疗手段。

神经元外大量淀粉样蛋白聚集形成的老年斑和神经元内异常过度磷酸化tau蛋白聚集形成的神经原纤维缠结是老年痴呆的两大病理特征。tau蛋白是神经细胞中主要的微管相关蛋白。其代谢的异常在老年痴呆等相关神经退行性致病过程中起重要作用。TDP-43(交互反应DNA结合蛋白)是一种主要在细胞核表达的DNA和RNA结合蛋白,参与基因转录和mRNA处理加工的调节。TDP-43异常聚集引起的病变与肌肉萎缩性侧索硬化症(渐冻症)有关,并在老年痴呆的进展中扮演着重要角色,被认为是与老年痴呆有关的第三种蛋白质。

该团队应用生物化学和分子生物学等手段,结合转基因动物和老年痴呆病例,首次探讨TDP-43在tau mRNA处理加工中的作用。科研人员发现,现TDP-43调节tau mRNA的稳定性和tau外显子10的可变剪接,TDP-43的病变可能通过影响tau mRNA的代谢加工,在阿尔茨海默病发生发展中起重要作用。TDP-43的病变、聚集可能通过影响tau mRNA的稳定性和tau外显子10的可变剪接,参与老年痴呆等相关神经退行性疾病的tau病理发生发展。

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    2017-11-06 天涯183

    非常好的文章.学习了

    0

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