Nat Neurosci:渐冻症和额颞叶痴呆患者中C9ORF72相关的协同致病机制

2020-04-16 MedSci原创 MedSci原创

编码预测鸟嘌呤交换因子C9ORF72的六核苷酸扩增是肌萎缩性脊髓侧索硬化症(ALS)和前颞叶痴呆(FTD)最常见的遗传原因。

编码预测鸟嘌呤交换因子C9ORF72的六核苷酸扩增是肌萎缩性脊髓侧索硬化症(ALS)和前颞叶痴呆(FTD)最常见的遗传原因。

虽然重复扩增已经确定会产生毒性产物,但编码C9ORF72蛋白的mRNA在受影响的个体中也会减少。

在这项研究中,研究人员测试了C9ORF72蛋白水平如何影响重复介导的毒性。在表达66个GGGGCC重复的C9orf72体外转基因小鼠中,一个或两个内源性C9ORF72等位基因失活分别诱发或加速了早期死亡。

在表达具有450个重复的C9orf72转基因的小鼠中,一个或两个内源性C9orf72等位基因失活,加剧了认知障碍、海马神经元缺失、神经胶质活化,和二肽重复蛋白的积累。

减少的C9ORF72被证明可以抑制重复介导的细胞自噬的升高。

这些结果支持了ALS/FTD中的一种疾病机制,疾病中C9ORF72减少,可导致自噬缺陷,与重复依赖性的毒性增益协同作用。

 

原始出处:

Qiang Zhu et al. Reduced C9ORF72 function exacerbates gain of toxicity from ALS/FTD-causing repeat expansion in C9orf72. Nat Neurosci, 2020.

 

 

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    2020-07-06 liye789132251
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    2020-04-18 xjy02
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    2020-04-18 lsndxfj
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    2020-04-18 cmsvly
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    2020-04-16 肿肿

    机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要

    0

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    2020-04-16 junJUN

    老年人痴呆何药可用??

    0

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Sci Transl med:潜在治疗靶标,ASL新发病机制或被发现!

一直以来,科学家都尝试从各方面寻找导致肌萎缩侧索硬化症的原因,从而对症下药。12月18日,发表在《Science Translational Medicine》的一份新研究报告让人们对ALS发病机制有了更进一步的了解。

Kadimastem报告其针对渐冻症的干细胞疗法阳性结果

据Globes报道,Kadimastem公司宣布了其正在开发的干细胞疗法AstroRx用于肌萎缩性侧索硬化症(ALS)的I / IIa期细胞替代试验中,用该药治疗的第一组患者的结果。

Cell:渐冻症新机制被揭示,致病基因阻碍了神经元中RNA“搭便车”

肌萎缩性侧索硬化症(ALS)又被称为“渐冻症”,是四大常见的神经退行性疾病之一,也是一种罕见的,目前无法治愈的疾病。常发年龄为40~60岁,男性患者占60%,女性患者占40%。发病原因到目前为止仍不明确。

Nat Genet:从基因层面找到“渐冻症”发病机理

还记得风靡全球的“冰桶挑战”吗?它将“渐冻症”带进了公众的视野,让越来越多的人了解到这一罕见病,同时也让我们更多得了解到神经退行性疾病,譬如阿尔茨海默病,但同时,我们也越来越深刻地认识到了人类对神经退行性疾病的束手无策,据专家分析,在不久的将来,神经退行性疾病极有可能超越癌症成为人类一大致死率极高的疾病。

Neuron:新发现:渐冻症“元凶”可能是它!

肌萎缩侧索硬化症(ALS)听起来有点耳生,换个外套“渐冻症”,大家就秒懂了。基因解码研究发现几种基因突变可导致ALS,有助于散发性ALS的发展。如今,科学家们对渐冻症“元凶”展开了研究。

“渐冻人”孤儿药依达拉奉来了 国内药企如何应对?

2019年7月25日,国家药监局批准了田边三菱制药的依达拉奉(Edaravone)100ml:30mg注射液。2019年4月12日,田边三菱制药以进口5.1类提交依达拉奉氯化钠注射液上市申请获得CDE承办受理,6月21日以“罕见病用药”为由拟纳入优先审评。虽然依达拉奉用于治疗ALS的作用机制尚不明确,但是全球渐冻人症治疗的最新药物。