Methylomic profiling implicates cortical deregulation of ANK1 in Alzheimer's disease.

Methylomic profiling implicates cortical deregulation of ANK1 in Alzheimer's disease.
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DOI:
10.1038/nn.3782
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发表时间:
2014-09
影响因子:
25
通讯作者:
Mill, Jonathan
Mill, Jonathan
中科院分区:
医学1区
文献类型:
--
作者:
Lunnon, Katie;Smith, Rebecca;Hannon, Eilis;De Jager, Philip L.;Srivastava, Gyan;Volta, Manuela;Troakes, Claire;Al-Sarraj, Safa;Burrage, Joe;Macdonald, Ruby;Condliffe, Daniel;Harries, Lorna W.;Katsel, Pavel;Haroutunian, Vahram;Kaminsky, Zachary;Joachim, Catharine;Powell, John;Lovestone, Simon;Bennett, David A.;Schalkwyk, Leonard C.;Mill, Jonathan

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阿尔茨海默病(Alzheimer's disease,AD)是一种以进行性神经病理和认知功能下降为特征的慢性神经退行性疾病。我们描述了一个跨组织分析的甲基化的变化,在AD中使用的样本从三个独立的人类死后的大脑队列。我们确定了锚蛋白1(ANK1)基因中的差异甲基化区域,该区域与内嗅皮层(AD表现的主要部位)的神经病理学相关。该区域在其他两个皮质区域(上级颞回和前额叶皮质)中被证实为显著高甲基化,但在小脑中没有,小脑在很大程度上保护AD中的神经变性,也没有从同一个体的尸检前获得的全血中。神经病理学相关的ANK1超甲基化随后在来自三个独立脑组的皮质样本中得到证实。这项研究代表了AD的第一个表观全基因组关联研究(EWAS),该研究采用了跨多个组织的顺序复制设计,并强调了这种方法用于识别与复杂疾病相关的甲基化变异的能力。
Alzheimer’s disease (AD) is a chronic neurodegenerative disorder characterized by progressive neuropathology and cognitive decline. We describe a cross-tissue analysis of methylomic variation in AD using samples from three independent human post-mortem brain cohorts. We identify a differentially methylated region in the ankyrin 1 (ANK1) gene that is associated with neuropathology in the entorhinal cortex, a primary site of AD manifestation. This region was confirmed as significantly hypermethylated in two other cortical regions (superior temporal gyrus and prefrontal cortex) but not in the cerebellum, a region largely protected from neurodegeneration in AD, nor whole blood obtained pre-mortem, from the same individuals. Neuropathology-associated ANK1 hypermethylation was subsequently confirmed in cortical samples from three independent brain cohorts. This study represents the first epigenome-wide association study (EWAS) of AD employing a sequential replication design across multiple tissues, and highlights the power of this approach for identifying methylomic variation associated with complex disease.
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