Expression and genetic analysis of microRNAs involved in multiple sclerosis

Elisa Ridolfi, Chiara Fenoglio, Claudia Cantoni, Alberto Calvi, Milena De Riz, Anna Pietroboni, Chiara Villa, Maria Serpente, Rossana Bonsi, Marco Vercellino, Paola Cavalla, Daniela Galimberti, Elio Scarpini

Research output: Contribution to journalArticle

Abstract

Evidence underlines the importance of microRNAs (miRNAs) in the pathogenesis of multiple sclerosis (MS). Based on the fact that miRNAs are present in human biological fluids, we previously showed that miR-223, miR-23a and miR-15b levels were downregulated in the sera of MS patients versus controls. Here, the expression levels of these candidate miRNAs were determined in peripheral blood mononuclear cells (PBMCs) and the serum of MS patients, in addition to three genotyped single nucleotide polymorphisms (SNPs). Mapping in the genomic regions of miR-223, miR-23a and miR-15b genes, 399 cases and 420 controls were tested. Expression levels of miR-223 and miR-23a were altered in PBMCs from MS patients versus controls. Conversely, there were no differences in the expression levels of miR-15b. A significantly decreased genotypic frequency of miR-223 rs1044165 T/T genotype was observed in MS patients. Moreover, the allelic frequency of miR-23a rs3745453 C allele was significantly increased in patients versus controls. In contrast, there were no differences in the distribution of miR-15b SNP. In conclusion, our results suggest that miR-223 and miR-23a could play a role in the pathogenesis of MS. Moreover, miR-223 rs1044165 polymorphism likely acts as a protective factor, while miR-23a rs3745453 variant seems to act as a risk factor for MS.

Original languageEnglish
Pages (from-to)4375-4384
Number of pages10
JournalInternational Journal of Molecular Sciences
Volume14
Issue number3
DOIs
Publication statusPublished - Mar 2013

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Keywords

  • Association analysis
  • Gene expression
  • microRNA
  • Smultiple sclerosis

ASJC Scopus subject areas

  • Computer Science Applications
  • Molecular Biology
  • Catalysis
  • Inorganic Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Physical and Theoretical Chemistry

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