Interrogation of brain miRNA and mRNA expression profiles reveals a molecular regulatory network that is perturbed by mutant huntingtin

Jing Jin, Yong Cheng, Yongqing Zhang, William Wood, Qi Peng, Emmette Hutchison, Mark P. Mattson, Kevin G. Becker, Wenzhen Duan

Research output: Contribution to journalArticle

Abstract

Emerging evidence indicates that microRNAs (miRNAs) may play an important role in the pathogenesis of Huntington's disease (HD). To identify the individual miRNAs that are altered in HD and may therefore regulate a gene network underlying mutant huntingtin-induced neuronal dysfunction in HD, we performed miRNA array analysis combined with mRNA profiling in the cerebral cortex from N171-82Q HD mice. Expression profiles of miRNAs as well as mRNAs in HD mouse cerebral cortex were analyzed and confirmed at different stages of disease progression; the most significant changes of miRNAs in the cerebral cortex were also detected in the striatum of HD mice. Our results revealed a significant alteration of miR-200 family members, miR-200a, and miR-200c in the cerebral cortex and the striatum, at the early stage of disease progression in N171-82Q HD mice. We used a coordinated approach to integrate miRNA and mRNA profiling, and applied bioinformatics to predict a target gene network potentially regulated by these significantly altered miRNAs that might be involved in HD disease progression. Interestingly, miR-200a and miR-200c are predicted to target genes regulating synaptic function, neurodevelopment, and neuronal survival. Our results suggest that altered expression of miR-200a and miR-200c may interrupt the production of proteins involved in neuronal plasticity and survival, and further investigation of the involvement of perturbed miRNA expression in HD pathogenesis is warranted, and may lead to reveal novel approaches for HD therapy.

Original languageEnglish (US)
Pages (from-to)477-490
Number of pages14
JournalJournal of Neurochemistry
Volume123
Issue number4
DOIs
StatePublished - Nov 2012

Keywords

  • Huntington's disease
  • Trim2
  • gene array
  • miR-200
  • miRNA array

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

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