Network Tau spreading is vulnerable to the expression gradients of APOE and glutamatergic-related genes.

Network Tau spreading is vulnerable to the expression gradients of APOE and glutamatergic-related genes.
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DOI:
10.1126/scitranslmed.abn7273
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发表时间:
2022-07-27
影响因子:
17.1
通讯作者:
Sepulcre, Jorge
Sepulcre, Jorge
中科院分区:
医学1区
文献类型:
--
作者:
Montal, Victor;Diez, Ibai;Kim, Chan-Mi;Orwig, William;Bueicheku, Elisenda;Gutierrez-Zuniga, Raquel;Bejanin, Alexandre;Pegueroles, Jordi;Dols-Icardo, Oriol;Vannini, Patrizia;El-Fakhri, Georges;Johnson, Keith A.;Sperling, Reisa A.;Fortea, Juan;Sepulcre, Jorge

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阿尔茨海默病(AD)病理学的一个关键标志是tau蛋白以神经元缠结的形式在人脑皮层的大规模网络中积累。目前,尚不清楚tau如何在特定的皮质系统中积累,以及原位遗传性状是否在这种基于回路的传播过程中发挥作用。在这项研究中,使用两个独立的认知健康的老年参与者队列,我们揭示了tau传播的骨干及其与高分辨率转录组遗传数据的网络交叉点。我们观察到,特定的连接遗传梯度存在沿着的tau蛋白扩散网络。特别是,我们确定了577个基因,显着伴随tau蛋白的空间传播;一组基因,其中APOE和神经元突触基因(如SLC 1A 2)发挥核心作用。因此,我们的研究描述了tau蛋白扩散的独特脑回路中的神经遗传拓扑脆弱性,并建议应探索针对这组基因梯度表达的药物开发策略,以帮助阻止或防止tau蛋白的积累。Tau的积累与细胞易感性的梯度基因表达特征有关,其中APOE和SLC 1A 2起关键作用。
A key hallmark of Alzheimer Disease (AD) pathology is the accumulation of tau protein in the form of neurofibrillary tangles across large-scale networks of the human brain cortex. Currently, it is still unclear how tau accumulates within specific cortical systems, and whether in situ genetic traits play a role in this circuit-based propagation progression. In this study, using two independent cohorts of cognitively healthy older participants, we reveal the backbone of tau spreading and its network intersections with high-resolution transcriptomic genetic data. We observed that specific connectomic-genetic gradients exist along the tau spreading network. Particularly, we identified 577 genes that significantly accompany the spatial spreading of tau; a set of genes in which APOE and glutamatergic synaptic genes (e.g. SLC1A2) play a central role. Thus, our study characterizes neurogenetic topological vulnerabilities in distinctive brain circuits of tau spreading and suggests that drug development strategies targeting the gradient expression of this set of genes should be explored to help stop or prevent the accumulation of tau. Tau accumulation is related to a gradient gene-expression signature of cell-susceptibility where APOE and SLC1A2 play a key role.
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