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MOL PSYCHIATR: 阿尔茨海默病相关基因座遗传易感性的评估

2017-04-16 MedSci MedSci原创

包括阿尔茨海默病(AD)和其他神经变性病症在内的Tau病变都是神经原纤维缠结(NFTs)的原因。随着年龄的增长,大脑中也会积累神经纤维缠结(NFT)。NFT的积累被认为与AD的认知衰退密切相关。Tau蛋白病理是阿尔茨海默症(AD)的一个重要特征。本研究对影响Tau蛋白聚集的关键基因进行了阐述。

近日,来自芝加哥Rush大学医学中心阿尔茨海默症研究中心研究人员报道了一项关于阿尔茨海默病病因学的研究,相关研究成果刊登于国际杂志MOL PSYCHIATR上。

包括阿尔茨海默病(AD)和其他神经变性病症在内的Tau病变都是神经原纤维缠结(NFTs)的原因。随着年龄的增长,大脑中也会积累神经纤维缠结(NFT)。NFT的积累被认为与AD的认知衰退密切相关。Tau蛋白病理是阿尔茨海默症(AD)的一个重要特征。本研究对影响Tau蛋白聚集的关键基因进行了阐述。

在本研究中,研究人员对NFT病理负荷进行全基因组关联研究,并报告了前瞻性研究中与909个尸体解剖中PTPRD基因座(rs560380P = 3.8×10 -8)的关联性。而且这种关联在随后的369个尸体解剖独立数据集中能得到重复。PTPRD是蛋白酪氨酸磷酸酶(PTP)家族成员。鸡和果蝇实验表明,PTPRD基因可以促进神经轴突生长、调节神经元的轴突导向。已经有报道显示了这个基因可有多可变剪接转录变体(multiple alternatively spliced transcript variants)。PTPRDNFT的关联不依赖于淀粉样蛋白病理学的积累。相比之下,研究人员发现ZCWPW1 AD敏感性变异影响NFT积累,并且这种作用是由淀粉样蛋白β斑块的积累介导的。此外,研究人员还进行了互补分析,以确定影响与NFT共存的多种神经病理学的共同途径,并发现某些基因座可能影响多种不同的神经病理学特征,包括tau,淀粉样蛋白β斑块,血管损伤和路易体的证据。

总体上,这些分析提供了对NFT的遗传易感性的评估,并有利于后期靶向药物的设计与开发。

原始出处:

L B Chibnik, C C White, S Mukherjee, et.al. Susceptibility to neurofibrillary tangles: role of the PTPRD locus and limited pleiotropy with other neuropathologies.

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    2017-04-17 FukaiBao
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