Connectomic-genetic signatures in the cerebral small vessel disease.

Connectomic-genetic signatures in the cerebral small vessel disease.
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脑小血管疾病中的连接组遗传特征。

DOI:
10.1016/j.nbd.2022.105671
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发表时间:
2022-06-01
影响因子:
6.1
通讯作者:
Sepulcre J
Sepulcre J
中科院分区:
医学1区
文献类型:
--
作者:
Gutiérrez-Zúñiga R;Diez I;Bueichekú E;Kim CM;Orwig W;Montal V;Fuentes B;Díez-Tejedor E;Fernández MG;Sepulcre J

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小血管病(SVD)是一种导致整个人脑实质血管病变的疾病。目前,原发性和继发性损伤如何相互作用而导致白色物质(WM)和灰质(GM)病变的复杂情况尚不清楚。使用新的横截面和纵向connectomic的方法,我们揭示了双向性质的GM和WM的变化,即原发性皮质神经退行性病变,导致继发性改变血管边界区,和WM病变,导致继发性神经退行性病变皮质投射区。我们发现,这种GM-WM互动是必不可少的执行认知性能。此外,我们还观察到GM和WM随时间的连锁变性与可能与SVD相关的基因的原型表达水平相关。在这些连接-遗传交叉点中,我们发现雄激素受体(AR)蛋白编码基因是一个特别重要的候选基因,可能赋予SVD脑损伤发展的关键脆弱性。总之,本研究在了解GM和WM病变,原发性和继发性血管神经退行性变之间的双向关系方面取得了进展,并揭示了SVD遗传特征背后的生物学机制。
Small vessel disease (SVD) is a disorder that causes vascular lesions in the entire parenchyma of the human brain. At present, it is not well known how primary and secondary damage interact to give rise to the complex scenario of white matter (WM) and grey matter (GM) lesions. Using novel cross-sectional and longitudinal connectomic approaches, we unveil the bidirectional nature of GM and WM changes, that is, primary cortical neurodegeneration that leads to secondary alterations in vascular border zones, and WM lesions that lead to secondary neurodegeneration in cortical projecting areas. We found this GM-WM interaction to be essential for executive cognitive performance. Moreover, we also observed that the interlocked degeneration of GM and WM over time associates with prototypical expression levels of genes potentially linked to SVD. Among these connectomic-genetic intersections, we found that the Androgen Receptor (AR) protein coding gene, is a particularly central candidate gene that might confer key vulnerability for brain lesion development in SVD. In conclusion, this study advances in the understanding of the bidirectional relationships between GM and WM lesions, primary and secondary vascular neurodegeneration, and sheds light on the biological mechanisms which underlie the genetic signatures of SVD.
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