RNA Toxicity and Perturbation of rRNA Processing in Spinocerebellar Ataxia Type 2.
RNA Toxicity and Perturbation of rRNA Processing in Spinocerebellar Ataxia Type 2.
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DOI:
10.1002/mds.28729
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发表时间:
2021-11
期刊:
影响因子:
--
通讯作者:
Rudnicki DD
中科院分区:
文献类型:
--
作者:
Li PP;Moulick R;Feng H;Sun X;Arbez N;Jin J;Marque LO;Hedglen E;Chan HYE;Ross CA;Pulst SM;Margolis RL;Woodson S;Rudnicki DD
Spinocerebellar ataxia type 2 (SCA2) is a neurodegenerative disease caused by expansion of a CAG repeat in Ataxin‐2 (ATXN2) gene. The mutant ATXN2 protein with a polyglutamine tract is known to be toxic and contributes to the SCA2 pathogenesis. Here, we tested the hypothesis that the mutant ATXN2 transcript with an expanded CAG repeat (expATXN2) is also toxic and contributes to SCA2 pathogenesis. The toxic effect of expATXN2 transcripts on SK‐N‐MC neuroblastoma cells and primary mouse cortical neurons was evaluated by caspase 3/7 activity and nuclear condensation assay, respectively. RNA immunoprecipitation assay was performed to identify RNA binding proteins (RBPs) that bind to expATXN2 RNA. Quantitative PCR was used to examine if ribosomal RNA (rRNA) processing is disrupted in SCA2 and Huntington's disease (HD) human brain tissue. expATXN2 RNA induces neuronal cell death, and aberrantly interacts with RBPs involved in RNA metabolism. One of the RBPs, transducin β‐like protein 3 (TBL3), involved in rRNA processing, binds to both expATXN2 and expanded huntingtin (expHTT) RNA in vitro. rRNA processing is disrupted in both SCA2 and HD human brain tissue. These findings provide the first evidence of a contributory role of expATXN2 transcripts in SCA2 pathogenesis, and further support the role of expHTT transcripts in HD pathogenesis. The disruption of rRNA processing, mediated by aberrant interaction of RBPs with expATXN2 and expHTT transcripts, suggest a point of convergence in the pathogeneses of repeat expansion diseases with potential therapeutic implications. © 2021 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society
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影响因子:
11.2
作者:
Li PP;Sun X;Xia G;Arbez N;Paul S;Zhu S;Peng HB;Ross CA;Koeppen AH;Margolis RL;Pulst SM;Ashizawa T;Rudnicki DD
通讯作者:
Rudnicki DD
影响因子:
7.3
作者:
Henras, Anthony K.;Plisson-Chastang, Celia;O'Donohue, Marie-Francoise;Chakraborty, Anirban;Gleizes, Pierre-Emmanuel
通讯作者:
Gleizes, Pierre-Emmanuel
影响因子:
9.9
作者:
Lorenzetti, D;Bohlega, S;Zoghbi, HY
通讯作者:
Zoghbi, HY
影响因子:
4.5
作者:
Bañez-Coronel M;Porta S;Kagerbauer B;Mateu-Huertas E;Pantano L;Ferrer I;Guzmán M;Estivill X;Martí E
通讯作者:
Martí E
影响因子:
14.5
作者:
Giunti, P;Sabbadini, G;Wood, NW
通讯作者:
Wood, NW