Multi-influential genetic interactions alter behaviour and cognition through six main biological cascades in Down syndrome mouse models.

Multi-influential genetic interactions alter behaviour and cognition through six main biological cascades in Down syndrome mouse models.
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DOI:
10.1093/hmg/ddab012
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发表时间:
2021-05-28
影响因子:
3.5
通讯作者:
Herault Y
Herault Y
中科院分区:
生物学2区
文献类型:
--
作者:
Duchon A;Del Mar Muniz Moreno M;Martin Lorenzo S;Silva de Souza MP;Chevalier C;Nalesso V;Meziane H;Loureiro de Sousa P;Noblet V;Armspach JP;Brault V;Herault Y

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唐氏综合征(Down syndrome,DS)是由人类21号染色体(Hsa 21)的额外拷贝的存在引起的智力残疾的最常见的遗传形式。为了提供新的见解,基因型-表型的相关性,我们使用标准化的行为测试,磁共振成像和海马基因表达筛选几个DS小鼠模型的小鼠染色体16区同源Hsa 21。首先,我们揭示了16号染色体不同区域之间的几种遗传相互作用,以及它们如何显著改变大脑认知、功能和结构中表型的结果。然后,深入分析参与突触功能障碍的失调表达基因,突出了围绕DYRK 1A,GSK 3 β,NPY,SNARE,RHOA和NPAS 4的六个生物级联反应。最后,我们提供了一个新的视野,现有的改变基因-基因串扰和分子机制,针对特定的枢纽在DS模型,应该成为中央更好地了解DS和改善治疗的发展。
Down syndrome (DS) is the most common genetic form of intellectual disability caused by the presence of an additional copy of human chromosome 21 (Hsa21). To provide novel insights into genotype–phenotype correlations, we used standardized behavioural tests, magnetic resonance imaging and hippocampal gene expression to screen several DS mouse models for the mouse chromosome 16 region homologous to Hsa21. First, we unravelled several genetic interactions between different regions of chromosome 16 and how they contribute significantly to altering the outcome of the phenotypes in brain cognition, function and structure. Then, in-depth analysis of misregulated expressed genes involved in synaptic dysfunction highlighted six biological cascades centred around DYRK1A, GSK3β, NPY, SNARE, RHOA and NPAS4. Finally, we provide a novel vision of the existing altered gene–gene crosstalk and molecular mechanisms targeting specific hubs in DS models that should become central to better understanding of DS and improving the development of therapies.
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