Gene expression analysis in cytoplasmic and nuclear fractions of P493-6 B cells with low c-myc expression to assess long noncoding RNA localization

ABSTRACT: Myc is a well known transcription factor with important roles in cell cycle, apoptosis and cellular transformation. Long non-coding (lnc)RNAs have recently emerged as a important class of regulatory RNAs. Here, we show that lncRNAs are an extensive component of the Myc-regulated transcriptional program. Using the P493-6 inducible Myc model we demonstrate that both Myc-induced mRNAs and lncRNAs were significant enriched for Myc binding sites. In contrast to Myc-repressed mRNAs, Myc-repressed lncRNAs were significantly enriched for Myc binding sites. Subcellular localization analysis revealed that Myc-repressed lncRNAs and mRNAs are enriched in the nucleus while Myc-induced lncRNAs and mRNAs are enriched both in the cytoplasm and nucleus. Parallel analysis of differentially expressed lncRNAs and mRNAs identified 105 lncRNA-mRNA pairs that were in close vicinity, indicative for regulation in cis. To support the potential relevance of the Myc-regulated lncRNAs in cellular transformation, we analyzed their expression in primary Myc-high and Myc-low B-cell lymphomas. In total, 54% of the lncRNAs differentially expressed between the lymphoma subsets were identified as Myc-regulated in P493-6 cells. This study is the first to show that lncRNAs are an important factor within the Myc-regulated transcriptional program and indicates a marked difference between Myc-repressed lncRNAs and mRNAs. Arrays: The total, cy3 labeled fraction and the cytoplasmic or nuclear, cy5 labeled fraction was hybridized on the same array. Data was imported and analyzed as a single color array. Expression of all known mRNAs and >10 000 lncRNAs was assessed in P493-6 B cells with low c-myc levels

ORGANISM(S): Homo sapiens

SUBMITTER: Melanie Winkle 

PROVIDER: E-GEOD-59478 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress