Neurobiol Aging: 利用线虫构建新型肌萎缩性侧索硬化症(ALS)模型

2013-11-20 Yu Tang 生物谷

2013年10月14日,知名神经生物学期刊《老年神经生物学》(Neurobiology of Aging)在线发表了中科院上海生命科学研究院/上海交通大学医学院健康科学研究所乐卫东研究组的最新研究成果"Human superoxide dismutase 1 overexpression in motor neurons of Caenorhabditis elegans causes axon

2013年10月14日,知名神经生物学期刊《老年神经生物学》(Neurobiology of Aging)在线发表了中科院上海生命科学研究院/上海交通大学医学院健康科学研究所乐卫东研究组的最新研究成果"Human superoxide dismutase 1 overexpression in motor neurons of Caenorhabditis elegans causes axon guidance defect and neurodegeneration",利用线虫构建了新型肌萎缩性侧索硬化症(ALS)模型。【原文下载

ALS是一种运动神经退行性疾病,病理表现为脊髓运动神经元大量死亡。研究证明,铜锌超氧化物歧化酶(SOD1)的大量积聚可以导致运动神经元的死亡,而大概有20%的家族型ALS病人存在多种突变形式的SOD1。虽然SOD1的错误折叠与聚集导致运动神经元损伤,但是其具体的分子学机制目前并不明朗。

在该研究中,健康所博士研究生李佳在乐卫东研究员的指导下,通过向线虫运动神经元里特异地过表达人源的野生型SOD1和突变型SOD1(G93A),成功再现了ALS的多种病理表现,包括年龄依赖性的运动障碍,运动神经元的死亡,以及SOD1的大量聚集和包涵体的形成。同时他们还发现,在构建的ALS转基因线虫的发育中,神经元的轴突导向也受到了损伤。

该项工作首次在线虫的运动神经元特异地过表达SOD1以构建新型的ALS模型,并成功的重现了ALS的轴突发育损伤以及成体后神经元的退行性死亡过程。这为进一步研究SOD1对ALS的致病机制提供了新的平台以及研究思路。

该课题研究得到了国家自然科学基金委和中国科学院等经费资助。

原文出处

Li J, Li T, Zhang X, Tang Y, Yang J, Le W.Human superoxide dismutase 1 overexpression in motor neurons of Caenorhabditis elegans causes axon guidance defect and neurodegeneration.Neurobiol Aging. 2013 Oct 11. 【原文下载

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    2014-05-03 sunylz
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    2013-11-22 zblhy
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Neurology:说外语有助于延缓痴呆

一项研究发现,说两种语言有助于延缓痴呆症的发生。而且,只要说外语就可以达到这种效果,不在乎说几种外语,也不在乎是否能读写外语。 这项研究发表在最新一期《神经学》杂志上。法新社11月6日说,这是科学家首次发现文盲说外语也能延缓痴呆症。 研究人员对648名被诊断出患有不同程度痴呆症的印度人进行语言能力调查。他们的平均年龄为66岁,分别患有阿兹海默氏症、血管性痴呆等痴呆相关疾病。结果发现,那些会说两

FAN:有氧运动可增强中老年人记忆力

对于中老年人来说,体育锻炼不仅有益于保持良好体质,而且有健脑功效。美国的一项新研究表明,有氧运动有助于增强中老年人的记忆力和其他认知能力,延缓他们的大脑衰老。 美国得克萨斯大学的研究人员近日在学术期刊《衰老神经科学前沿》上报告说,他们招募了37名57岁至75岁之间、不喜欢运动的志愿者进行研究。这些人被分成两组,其中一组在监督下每周进行3次、每次1小时的有氧运动——骑单车或跑步,为期共12周,另一