Gene expression analysis in myotonic dystrophy: Indications for a common molecular pathogenic pathway in DM1 and DM2

Annalisa Botta, Laura Vallo, Fabrizio Rinaldi, Emanuela Bonifazi, Francesca Amati, Michela Biancolella, Stefano Gambardella, Enzo Mancinelli, Corrado Angelini, Giovanni Meola, Giuseppe Novelli

Research output: Contribution to journalArticle

Abstract

An RNA gain-of-function of expanded transcripts is the most accredited molecular mechanism for myotonic dystrophy type 1 (DM1) and 2 (DM2). To disclose molecular parallels and divergences in pathogenesis of both disorders, we compared the expression profile of muscle biopsies from DM1 and DM2 patients to controls. DM muscle tissues showed a reduction in the major skeletal muscle chloride channel (CLCN1) and transcription factor Sp1 transcript levels and an abnormal processing of the CLCN1 and insulin receptor (IR) pre-mRNAs. No essential differences were observed in the muscle blind-like gene (MBNL1) and CUG binding protein 1 (CUGBP1) transcript levels as well as in the splicing pattern of the myotubularin-related 1 (MTMR1) gene. Macroarray analysis of 96 neuroscience-related genes revealed a considerable similar expression profile between the DM samples, reflective of a common muscle pathology origin. Using a twofold threshold, we found six misregulated genes important in calcium and potassium metabolism and in mitochondrial functions. Our results indicate that the DM1 and DM2 overlapping clinical phenotypes may derive from a common trans acting mechanism that traps and influences shared genes and proteins.

Original languageEnglish
Pages (from-to)339-351
Number of pages13
JournalGene Expression
Volume13
Issue number6
DOIs
Publication statusPublished - 2007

Keywords

  • Expression analysis
  • Ion channels
  • Myotonic dystrophy
  • Pathogenesis
  • Splicing

ASJC Scopus subject areas

  • Genetics

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    Botta, A., Vallo, L., Rinaldi, F., Bonifazi, E., Amati, F., Biancolella, M., Gambardella, S., Mancinelli, E., Angelini, C., Meola, G., & Novelli, G. (2007). Gene expression analysis in myotonic dystrophy: Indications for a common molecular pathogenic pathway in DM1 and DM2. Gene Expression, 13(6), 339-351. https://doi.org/10.3727/000000006781510705