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Exon array analysis in the mouse myoblast cell line, C2C12 cells treated with control-, Cugbp1- or Mbnl1-siRNA

ABSTRACT: CUGBP1 and MBNL1 are developmentally regulated RNA-binding proteins that are causally associated with myotonic dystrophy type 1. Using HITS-CLIP anlysis, we found CUGBP1 and MBNL1 preferentially bind to alternatively spliced introns and exons, as well as to the 3' UTRs. To analyze more directly the role of CUGBP1/MBNL1 binding in alternative splicing, we performed exon array analysis in C2C12 cells using expression arrays.

ORGANISM(S): Mus musculus

PROVIDER: GSE29990 | GEO | 2012/01/03

SECONDARY ACCESSION(S): PRJNA140711

REPOSITORIES: GEO

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Exon array analysis in the mouse myoblast cell line, C2C12 cells treated with control-, Cugbp1- or Mbnl1-siRNA

Project description:CUGBP1 and MBNL1 are developmentally regulated RNA-binding proteins that are causally associated with myotonic dystrophy type 1. Using HITS-CLIP anlysis, we found CUGBP1 and MBNL1 preferentially bind to alternatively spliced introns and exons, as well as to the 3' UTRs. To analyze more directly the role of CUGBP1/MBNL1 binding in alternative splicing, we performed exon array analysis in C2C12 cells using expression arrays. We analyzed total RNA of C2C12 cells treated with control-, Cugbp1- or Mbnl1-siRNA. RNA was harvested 48 hrs after transfection.

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RNA CLIP-seq for Cugbp1, Mbnl1 and Ptbp1 in mouse C2C12 myoblasts

Project description:CUG-binding protein 1 (CUGBP1) and muscleblind-like 1 (MBNL1) are developmentally regulated RNA-binding proteins that are causally associated with myotonic dystrophy type 1. We extensively determined RNA-binding sites of CUGBP1 and MBNL1 to investigate their roles in RNA processing. We also analyzed polypyrimidine tract-binding protein (PTB) as a control. CUGBP1 and MBNL1 preferentially bind to alternatively spliced introns and exons, respectively, and regulate alternative splicing events. Moreover, CUGBP1 and MBNL1 are preferentially bound to the 3' untranslated regions (UTRs), in particular of genes for RNA-binding proteins, and facilitate decay of the bound mRNAs. In addition, CUGBP1 and MBNL1 mutually destabilize mRNA. Precise temporal regulation of CUGBP1 and MBNL1 are likely to be essential for accurate control of destabilization of a broad spectrum of genes as well as of alternative splicing events in cell differentiation and tissue development.

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mRNA immunoprecipitated with CUGBP1 in C2C12

Project description:Dramatic changes in gene expression occur in response to extracellular stimuli and during differentiation. Although transcriptional effects are important, alterations in mRNA decay also play a major role in achieving rapid and massive changes in mRNA abundance. Moreover, just as transcription factor activity varies between different cell types, the factors influencing mRNA decay are also cell-type specific.GREs are recognized by CUGBP1, an RNA-binding protein and instability factor whose function is affected in several neuromuscular diseases. To dectect the mRNA associated with CUGBP1, we utilized RNA immunoprecipitation followed by microarray (RIP-Chip) to identify CUGBP1-associated transcripts.

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Systematic analysis of cis-elements in unstable mRNAs demonstrates that CUGBP1 is a key regulator of mRNA decay in muscle cells

Project description:This SuperSeries is composed of the following subset Series: GSE21233: Expression data from C2C12 mouse myoblast with treatment actinomycin D GSE21235: mRNA immunoprecipitated with CUGBP1 in C2C12 Refer to individual Series

2010-07-08 | E-GEOD-21236 | biostudies-arrayexpress

Transcriptome-wide Regulation of Splicing and mRNA Localization by Muscleblind Proteins

Project description:The Muscleblind-like (Mbnl) family of RNA-binding proteins plays important roles in muscle and eye development and in Myotonic Dystrophy (DM), where expanded CUG or CCUG repeats functionally deplete Mbnl proteins. We identified transcriptome-wide functional and biophysical targets of Mbnl proteins in brain, heart, muscle, and myoblasts using RNA sequencing and crosslinking/immunoprecipitation-sequencing approaches. This analysis identified several hundred splicing events whose regulation depended on Mbnl function, in a pattern indicative of functional interchangeability between Mbnl1 and Mbnl2. A nucleotide resolution RNA map associated repression or activation of exon splicing with Mbnl binding near either 3' splice site or near the downstream 5' splice site, respectively. Transcriptomic analysis of sub-cellular compartments uncovered a global role for Mbnls in regulating localization of mRNAs encoding membrane, synaptic and other proteins in both mouse and Drosophila cells, and Mbnls also contribute to protein secretion. These findings hold several new implications for DM pathogenesis. To assess global functions of Muscleblind proteins, RNA-Seq was performed using WT and Mbnl1 KO brain, heart, and muscle (5 mice each). Additionally, C2C12 mouse myoblasts were depleted of Mbnl1, Mbnl2, or both. Subcellular fractionation experiments were performed to analyze mRNA localization following depletion of Mbnl1 and Mbnl2 in C2C12 mouse myoblasts, and following depletion of Mbnl in Drosophila S-2R+ cells. CLIP-Seq was also performed against Mbnl1 in mouse brain, heart, muscle, and C2C12 myoblasts. Finally, ribosome footprinting was performed with C2C12 mouse myoblasts that were depleted of Mbnl1, Mbnl2, or both.

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