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dc.contributor.authorFernández-Costa, Juan M.-
dc.contributor.authorGarcía López, A.-
dc.contributor.authorZúñiga, Sheila-
dc.contributor.authorFernández-Pedrosa, Victoria-
dc.contributor.authorFelipo-Benavent, Amelia-
dc.contributor.authorMata, Manuel de la-
dc.contributor.authorJaka, Oihane-
dc.contributor.authorAiastui, Ana-
dc.contributor.authorHernández Torres, Francisco-
dc.contributor.authorAguado, Begoña-
dc.contributor.authorPérez-Alonso, Manuel-
dc.contributor.authorVilchez, Jesús J.-
dc.contributor.authorLópez de Munain, Adolfo-
dc.contributor.authorArtero, Rubén-
dc.identifierdoi: 10.1093/hmg/dds478-
dc.identifierissn: 0964-6906-
dc.identifier.citationHuman Molecular Genetics 22: 704- 716 (2013)-
dc.description.abstractMyotonic dystrophy type 1 (DM1) is caused by the expansion of CTG repeats in the 3' untranslated region of the DMPK gene. Several missplicing events and transcriptional alterations have been described in DM1 patients. A large number of these defects have been reproduced in animal models expressing CTG repeats alone. Recent studies have also reported miRNA dysregulation in DM1 patients. In this work, a Drosophila model was used to investigate miRNA transcriptome alterations in the muscle, specifically triggered by CTG expansions. Twenty miRNAs were differentially expressed in CTG-expressing flies. Of these, 19 were down-regulated, whereas 1 was up-regulated. This trend was confirmed for those miRNAs conserved between Drosophila and humans (miR-1, miR-7 and miR-10) in muscle biopsies from DM1 patients. Consistently, at least seven target transcripts of these miRNAs were up-regulated in DM1 skeletal muscles. The mechanisms involved in dysregulation of miR-7 included a reduction of its primary precursor both in CTG-expressing flies and in DM1 patients. Additionally, a regulatory role for Muscleblind (Mbl) was also suggested for miR-1 and miR-7, as these miRNAs were down-regulated in flies where Mbl had been silenced. Finally, the physiological relevance of miRNA dysregulation was demonstrated for miR-10, since over-expression of this miRNA in Drosophila extended the lifespan of CTG-expressing flies. Taken together, our results contribute to our understanding of the origin and the role of miRNA alterations in DM1. © The Author 2012. Published by Oxford University Press. All rights reserved.-
dc.description.sponsorshipFundacion Ramon Areces; Generalitat Valenciana (Prometeo/2010/081); Ministerio de Ciencia e Innovacion (SAF2006-09121) in collaboration with the biotechnology company Sistemas Genomicos S.L.; FIS (FIS09-00660) ; Isabel Gemio Foundation; Accion Especial de Enfermedades Raras ‘Cetegen’ by Genoma Espana Foundation; Generalitat Valenciana; Fundacion Ramon Areces; Banca Civica; Basque Government (AE-BFI-08.164); ISCIII; Ministerio de Economia y Competitividad-
dc.publisherOxford University Press-
dc.titleExpanded CTG repeats trigger miRNA alterations in Drosophila that are conserved in myotonic dystrophy type 1 patients-
dc.description.versionPeer Reviewed-
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