Project description:Transcriptional profiling of human BJ fibroblasts comparing control FF shRNA expressing cells vs. BRD7 shRNA expressing cells under two conditions, either untreated or treated with 8uM nutln-3a for 8 hours. This experiment was done using two independent shRNAs targeting BRD7. Nutlin-3a was used to stabilize p53 and induce its transcriptional activity. Two-condition experiment, FF shRNA cells vs. BRD7 shRNAs cells in two experimental conditions, either untreated or treated with nutlin-3a.
Project description:Transcriptional profiling of human BJ fibroblasts comparing control FF shRNA expressing cells vs. BRD7 shRNA expressing cells under two conditions, either untreated or treated with 8uM nutln-3a for 8 hours. This experiment was done using two independent shRNAs targeting BRD7. Nutlin-3a was used to stabilize p53 and induce its transcriptional activity.
Project description:Oncogene-induced senescence (OIS) is a p53-dependent defence mechanism against uncontrolled proliferation. Consequently, many human tumours harbour p53 mutations while others show a dysfunctional p53 pathway, frequently by unknown mechanisms. We identified BRD7, a bromodomain-containing protein whose inhibition allows full neoplastic transformation in the presence of wild-type p53. Intriguingly, in human breast tumours harbouring wild-type, but not mutant p53, the BRD7 gene locus was frequently deleted and low BRD7 expression was found in a subgroup of tumours. Functionally, BRD7 is required for efficient p53-mediated transcription of a subset of target genes. BRD7 interacts with p53 and p300, and is recruited to target gene promoters, affecting histone acetylation, p53 acetylation, and promoter activity. Thus, BRD7 suppresses tumourigenicity by serving as a p53 cofactor required for efficient induction of p53-dependent OIS. We recorded mRNA expression profiles of BJ primary fibroblasts expressing the oncogene RasV12 and either control vector, one of two BRD7 knockdown vectors, or p53 knockdown vector. In addition, we profiled genome-wide protein DNA interactions for p53 and BRD7 using ChIP-Seq. p53- and BRD7-binding sites were recorded in RasV12-expressing BJ cells; as a control we used knockdown of the gene of interest (BRD7 or p53).
Project description:We applied RNA-seq analysis to control and senescent human primary BJ fibroblast cells (senescence induced by activation of the oncogenic RASG12V gene), as well as in BJ cells that fully or partially bypass oncogene-idnuced senescence (OIS) due to knock-down of either p53 or BRD7 or LncRNA-OIS1 (using 4 different shRNAs).
Project description:Overexpression myristoylated AKT1 in human BJ-TERT fibroblasts induces senescence (AIS). We depleted CBS, Tp53 or NF1 gene by shRNA in AIS cells and performed RNA-seq analysis to investigate the regulatory effect of these genes in AIS maintenance.
Project description:In this study human neonatal foreskin fibroblasts (HFF1 and BJ) were lipofected with an equal mixture of human reprogramming factor-encoding mRNAs. The cells were lysed and total RNA was harvested 24 hours post-transfection. Gene regulation was evaluated with respect to corresponding mock-transfected, Lipofectamine-treated control fibroblasts. For comparison, wildtype (un-treated) HFF1 and BJ fibroblasts as well as undifferentiated HFF1- and BJ-derived induced pluripotent stem cells and human embryonic stem cells (generated and maintained in our laboratory (refer to GSE26575) were included in the analysis.
Project description:In this study human neonatal foreskin fibroblasts (HFF1 and BJ) were lipofected with an equal mixture of human reprogramming factor-encoding mRNAs. The cells were lysed and total RNA was harvested 24 hours post-transfection. Gene regulation was evaluated with respect to corresponding mock-transfected, Lipofectamine-treated control fibroblasts. For comparison, wildtype (un-treated) HFF1 and BJ fibroblasts as well as undifferentiated HFF1- and BJ-derived induced pluripotent stem cells and human embryonic stem cells (generated and maintained in our laboratory (refer to GSE26575) were included in the analysis. Total RNA obtained from untreated human neonatal foreskin fibroblasts, reprogramming factor- and mock(Lipofectamine-treated)-transfected human neonatal fibroblasts, undifferentiated hESCs and iPSCs (derived from human neonatal foreskin fibroblasts).
Project description:Human BJ fibroblasts were treated with FLI-06 and gene expression was compared to untreated fibroblasts. RNA-seq data comprises 2 groups: treated and untreated BJ fibroblasts. Jena Centre for Systems Biology of Ageing - JenAge (www.jenage.de)
