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Bioinformatic analysis of microRNA expression in Huntington's disease

Xiaoyu Dong1, Shuyan Cong1

  • 1Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China.

Molecular Medicine Reports
|July 18, 2018
PubMed

Insights

This study identifies a pattern of microRNAs (miRNAs) involved in Huntington's disease (HD) pathogenesis. Key miRNAs like hsa‑miR‑4488, hsa‑miR‑196a‑5p, and hsa‑miR‑549a show potential as therapeutic targets for this inherited neurodegenerative disorder.

Area of Science:

  • Genetics and Molecular Biology
  • Neuroscience
  • Bioinformatics

Background:

  • Huntington's disease (HD) is an inherited neurodegenerative disorder caused by a CAG expansion in the Huntingtin (HTT) gene.
  • The precise pathogenesis of HD, despite its monogenic origin, remains incompletely understood.
  • Identifying molecular patterns, such as microRNA (miRNA) involvement, is crucial for understanding HD progression.

Purpose of the Study:

  • To identify a synergistic microRNA (miRNA) expression pattern associated with Huntington's disease (HD).
  • To explore the potential role of identified miRNAs and their target genes in HD pathogenesis.
  • To investigate potential therapeutic targets for HD based on miRNA-mRNA interactions.

Main Methods:

  • Downloaded and analyzed miRNA (GSE64977) and gene expression (GSE64810) datasets.
  • Utilized R programming for identifying differentially expressed genes (DEGs) and differentially expressed miRNAs (DEMs).
  • Employed TargetScan for miRNA target prediction, FunRich for Gene Ontology (GO) analysis, and Cytoscape for network construction.

Main Results:

  • Identified 1,612 DEGs and 10 DEMs.
  • GO analysis of DEGs highlighted roles in inflammatory and immune responses.
  • A network analysis revealed 33 overlapping genes between DEM targets and DEGs, implicating hsa‑miR‑4488, hsa‑miR‑196a‑5p, and hsa‑miR‑549a.

Conclusions:

  • The study successfully identified a miRNA-mRNA interaction network relevant to HD pathogenesis.
  • Specific miRNAs, including hsa‑miR‑4488, hsa‑miR‑196a‑5p, and hsa‑miR‑549a, are implicated in HD.
  • These findings suggest potential novel therapeutic targets for Huntington's disease.

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