Integrated genomics and proteomics define huntingtin CAG length-dependent networks in mice.

Integrated genomics and proteomics define huntingtin CAG length-dependent networks in mice.
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DOI:
10.1038/nn.4256
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发表时间:
2016-04
影响因子:
25
通讯作者:
Yang XW
Yang XW
中科院分区:
医学1区
文献类型:
--
作者:
Langfelder P;Cantle JP;Chatzopoulou D;Wang N;Gao F;Al-Ramahi I;Lu XH;Ramos EM;El-Zein K;Zhao Y;Deverasetty S;Tebbe A;Schaab C;Lavery DJ;Howland D;Kwak S;Botas J;Aaronson JS;Rosinski J;Coppola G;Horvath S;Yang XW

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To gain insight into how mutant huntingtin (mHtt) CAG repeat length modifies Huntington’s disease (HD) pathogenesis, we profiled mRNA in over 600 brain and peripheral tissue samples from HD knock-in mice with increasing CAG repeat lengths. We find repeat length dependent transcriptional signatures are prominent in the striatum, less so in cortex, and minimal in the liver. Co-expression network analyses reveal 13 striatal and 5 cortical modules that are highly correlated with CAG length and age, and that are preserved in HD models and some in the patients. Top striatal modules implicate mHtt CAG length and age in graded impairment of striatal medium spiny neuron identity gene expression and in dysregulation of cAMP signaling, cell death, and protocadherin genes. Importantly, we used proteomics to confirm 790 genes and 5 striatal modules with CAG length-dependent dysregulation at both RNA and protein levels, and validated 22 striatal module genes as modifiers of mHtt toxicities in vivo.
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