JAD:基因突变研究指出阿尔茨海默症病因新方向

2016-06-29 佚名 生物谷

来自澳大利亚阿德莱德大学的研究人员对可能引起早发阿尔茨海默症的基因突变进行了分析,为该病病因研究开辟了新的方向。 之前研究已经证明beta淀粉样蛋白出现异常积累是引起阿尔茨海默症的重要原因。但是也有研究人员对此表示担忧,认为上述情况并不能解释所有病因,并且至今没有开发出成功的治疗方法。阿德莱德大学的科学家们与澳大利亚其他大学的研究人员共同合作,通过一系列分析提出了关于PSEN1基因突变如

来自澳大利亚阿德莱德大学的研究人员对可能引起早发阿尔茨海默症的基因突变进行了分析,为该病病因研究开辟了新的方向。
 
之前研究已经证明beta淀粉样蛋白出现异常积累是引起阿尔茨海默症的重要原因。但是也有研究人员对此表示担忧,认为上述情况并不能解释所有病因,并且至今没有开发出成功的治疗方法。阿德莱德大学的科学家们与澳大利亚其他大学的研究人员共同合作,通过一系列分析提出了关于PSEN1基因突变如何触发早发阿尔茨海默病的新理论。
 
相关研究结果发表在国际学术期刊Journal of Alzheimer`s Disease上。
 
在这项研究中,研究人员对过去关于PSEN1基因的研究进行了分析,他们注意到该基因的突变类型与其是否能够引发阿尔茨海默病之间存在关联。正常PSEN1基因编码的蛋白产物在细胞中发挥许多不同作用,许多科学家都曾对PSEN1基因发生突变后如何影响beta淀粉样蛋白产生进行研究,阿德莱德大学的研究人员希望从一个更加广阔更加全面的角度对该基因的突变数据进行分析,不仅仅局限在beta淀粉样蛋白的产生,这样可以讲述一个不同的故事。
 
当PSEN1蛋白在细胞内发挥作用,其能够参与两条信号途径,其中一条能够导致beta淀粉样蛋白产生,而另外一条研究相对较少的信号途径控制着许多其他重要活动,包括细胞如何回收胞内成分以及如何应答氧气供应的限制。
 
研究结果表明基因突变如何影响PSEN1蛋白结构及其与其他蛋白的相互作用对第二条信号途径的影响更大。研究人员认为这项研究提出的理论或可扩展到对迟发性阿尔茨海默病发病机制的理解,他们现在正在阿尔茨海默病的动物模型上进行更进一步的研究。

原始出处

Tanyaa | Newman, Morgana | Verdile, Giuseppeb; c; d | Sutherland, Grege | Münch, Geraldf | Musgrave, Iang | Moussavi Nik, Seyyed Hania | Lardelli, Michael.Evidence For and Against a Pathogenic Role of Reduced γ-Secretase Activity in Familial Alzheimer's Disease.JAD.2016

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    2016-10-11 ylzr123

    赞了,认真探究、学习。

    0

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    2016-07-01 liangzhi1220

    非常好的研究,目前阿尔茨海默症的第二条通路研究很少

    0

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Cell:新的研究表明自闭症并不仅仅是一种脑部疾病

Cell:新的研究表明自闭症并不仅仅是一种脑部疾病近日来自哈佛医学院的一项新的研究表明,自闭症谱系障碍(ASD)——以社交能力和重复性的行为受损以及对感官刺激异常反应为特点的疾病——并不仅仅是因为脑发育缺陷所致,该研究结果已发表于Cell。事实上, ASD的一些影响甚至超出了大脑的范围,并可影响外周神经,而外周神经是负责将四肢的感觉信息传递至大脑。意味着这些神经系统的其他部分或是导致ASD患者对外

FDA批准用于非小细胞肺癌EGFR基因突变的液体活检技术

近日,FDA批准了罗氏cobas EGFR Mutation Test v2基因突变检测方法用于检测非小细胞肺癌相关的基因突变。该检测与癌症药物特罗凯配合使用,是FDA批准的首个基于血液检测的EGFR基因突变检测方法,可用于检测非小细胞肺癌患者EGFR的基因突变。临床试验评估了使用血液样本的罗氏cobas EGFR Mutation&nb

Neurology:ABCA7突变可表现典型的阿尔茨海默病

背景:在比利时老年痴呆症患者队列和一种常染色体显性遗传的家族中,识别产生临床和病理表型的患者,这些患者携带ABCA7突变基因并且功能丧失。方法:研究者对可用的数据记录,医疗记录,脑脊液分析结果和神经影响学研究及神经病理学进行回顾性分析。结果:突变携带者平均发病年龄(n = 22)为73.4±8.4岁,年龄范围较宽36(54-90)年,这独立于APOE基因型与脑血管病。平均病程5.7±3年(范围2-

Neurology:亨廷顿病风险基因远比你想象中的更常见

亨廷顿病(HD)是一种遗传性神经退行性疾病,据估计约30000多美国人患有此病,此外,还有200000人存在患病风险。但是,据来自加拿大温哥华英属哥伦比亚大学的一项新的研究显示,实际上的人数远比上述估计的要多,该研究发现已发表于Neurology。研究人员发现,普通人群体中“较低的外显率”(引起HD的基因突变的拷贝数为36-39)的发生率较既往报告的更大。这意味着,HD发生低危风险的患者的数目可能

科学家首次发现多发性硬化症致病基因突变

加拿大科学家1日报告说,一个可遗传的基因突变能引发多发性硬化症。这是首次发现多发性硬化症的致病基因突变,并第一次证实,一些多发性硬化症是遗传所致。多发性硬化症是一种中枢神经系统退行性疾病,可引起运动能力、平衡能力和视力下降,严重可导致瘫痪,其临床分型有4种,分别是复发缓解型、继发进展型、原发进展型和进展复发型。80%的患者为复发缓解型多发性硬化症,其中三分之二会转为继发进展型;原发进展型占10%至