Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptome of reloaded soleus muscle of 129/SV mice

ABSTRACT: 1 year-old male 129/SV mice. Animals were acclimatized to housing in single cages for one week followed by 7 days of hindlimb suspension and one day of reloading. Soleus muscle was harvested, total RNA isolated and subjected to transcript profiling with custom microarrays with custom-designed ATLASTM cDNA nylon filter as described (Dapp, C., Schmutz, S., Hoppeler, H. & Fluck, M. (2004) Physiol Genomics 20, 97-107). Keywords: transcriptome Six biological replicas

ORGANISM(S): Mus musculus

SUBMITTER: Martin FlÃ¼ck

PROVIDER: E-GEOD-8549 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Mechano-regulated tenascin-C orchestrates muscle repair.

Flück Martin M Mund Sonja I SI Schittny Johannes C JC Klossner Stephan S Durieux Anne-Cécile AC Giraud Marie-Noëlle MN

Proceedings of the National Academy of Sciences of the United States of America 20080829 36

Tenascin-C (TNC) is a mechano-regulated, morphogenic, extracellular matrix protein that is associated with tissue remodeling. The physiological role of TNC remains unclear because transgenic mice engineered for a TNC deficiency, via a defect in TNC secretion, show no major pathologies. We hypothesized that TNC-deficient mice would demonstrate defects in the repair of damaged leg muscles, which would be of functional significance because this tissue is subjected to frequent cycles of mechanical d ...[more]

PMID: 18757758

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Project description:Transitions between pluripotent stem cells and differentiated cells are executed by key transcription regulators. Comparative measurements of RNA polymerase distribution over the genomeM-bM-^@M-^Ys primary transcription units in different cell states can identify the genes and steps in the transcription cycle that are regulated during such transitions. To identify the complete transcriptional profiles of RNA polymerases with high sensitivity and resolution, as well as the critical regulated steps upon which regulatory factors act, we used genome-wide, nuclear run-on (GRO-seq) to map the density and orientation of transcriptionally-engaged RNA polymerases in mouse embryonic stem cells (ESCs) and embryonic fibroblasts (MEFs). In both cell types, progression of a promoter-proximal, paused RNA polymerase II (Pol II) into productive elongation is a rate-limiting step in transcription of ~40% of mRNA-encoding genes. Importantly, quantitative comparisons between cell types reveal that transcription is controlled frequently at paused Pol IIM-bM-^@M-^Ys entry into elongation. Furthermore, M-bM-^@M-^\bivalentM-bM-^@M-^] ESC genes (exhibiting both active and repressive histone modifications) bound by Polycomb Group Complexes PRC 1 and PRC2 show dramatically reduced levels of paused Pol II at promoters relative to an average gene. In contrast, bivalent promoters bound by only PRC2 allow Pol II pausing, but it is confined to extremely 5M-bM-^@M-^Y proximal regions. Altogether, these findings identify rate-limiting targets for transcription regulation during cell differentiation. Mapping engaged RNA polymerase density in two cell types by sequencing run-on transcripts. SUPPLEMENTARY FILES: All fastq files have sanger-fastq format q values. Alignments were generated with eland and the mm9 mouse genome assembly. Reads aligning to regions annotated as similar to rRNA by RepeatMasker were then removed. Wiggle files are in units of RPKM (reads per kilobase per million aligned reads) and are broken up by cell type and chromosome to aid in uploading to UCSC. Each file furthermore contains two tracks - one for each strand. As in the published paper, plus strand RPKM densities are in red with positive values and minus strand RPKM densities are in blue with negative values.

Dataset Information

Transcriptome of reloaded soleus muscle of 129/SV mice

Publications

Mechano-regulated tenascin-C orchestrates muscle repair.

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