Project description:ChIP-seq experiments using an anti-RBR1 antibody were performed on MM2d cell culture material from Arabidopsis thaliana (3d after sub-culture).
Project description:To obtain a global view of APA during the development of retinoblastoma, we subjected total RNAs from five retina sample and five retinoblastoma samples to PA-seq, which precisely identify poly(A) sites at the genome scale.
Project description:Although well characterized as a transcriptional activator, androgen receptor (AR) can also function as a direct transcriptional repressor in prostate cancer cells. The major targets of the AR repressive function are genes mediating DNA synthesis. In this study, we found that AR was recruited to the majority of these DNA synthesis genes and rapidly repressed their transcription. This direct AR mediated repression was enhanced in prostate cancer cells expressing higher levels of AR, and was mediated by recruitment of hypophosphorylated retinoblastoma protein (Rb).
Project description:Genomic losses on chromosome 16q are among the most frequent alterations found in retinoblastoma. In this study, Affymetrix GeneChip analyses along with LOH analysis of microsatellie markers was used to identify candidate tumor suppressor loci in a set of retinoblastoma. We used microarrays to identify genes differentially expressed in retinoblastoma with LOH on 16q (M19484, M22590, M22641, M22860) compared to retinoblastoma without alterations in this region (M20517, M22067, M22233, M23209, M23449, M23818, M23896, M23978) Keywords: Disease progression
Project description:Although well characterized as a transcriptional activator, androgen receptor (AR) can also function as a direct transcriptional repressor in prostate cancer cells. The major targets of the AR repressive function are genes mediating DNA synthesis. In this study, we found that AR was recruited to the majority of these DNA synthesis genes and rapidly repressed their transcription. This direct AR mediated repression was enhanced in prostate cancer cells expressing higher levels of AR, and was mediated by recruitment of hypophosphorylated retinoblastoma protein (Rb). Examination of Rb binding in 4 hours DHT treated prostate cancer cell lines VCaP and LNCaP
Project description:Retinoblastoma is a malignant tumor of the retina which most often occurs in children below 5 years of age with an incident rate of about 1 in 15,000 to 18,000 live births. Retinoblastoma is the first ever cancer that was reported to have a genetic basis. It occurs widely due to inactivating mutations in RB1 gene. Gene expression studies, copy number variation analysis, epigenetic profiling including miRNA and methylation of retinoblastoma has been carried to understand the disease mechanism and key players in the disease. Our group has earlier performed differential proteomics of retinoblastoma to identify proteins of therapeutic importance. However, there are no studies to understand the signalling mechanisms associated with retinoblastoma. Hence, global phosphoproteomics of retinoblastoma was carried out to identify signalling events associated with this cancer. Our study identified stress response proteins to be hyper phosphorylated which included H2AFX and sirtuin 1. In particular, Ser140 of H2AFX also known as gamma-H2AX was found to be hyperphosphorylated in retinoblastoma that indicated activation of DNA damage response pathways. We also observed activation of anti-apoptotic proteins in retinoblastoma compared to control. These observations showed activation of survival pathways and signalling networks activated in tumors.
Project description:In order to identify the gene targets of frequently altered chromosomal regions in retinoblastoma, a meta-analysis of genome-wide copy number alterations studies on primary retinoblastoma tissue and retinoblastoma cell lines was performed. Published studies were complemented by copy number and gene expression analysis on primary and cell line samples of retinoblastoma. This dataset includes the gene expression data of the retinoblastoma cell lines
Project description:Gene expression profiles in retinoblastoma by whole Human Genome DNA microarrays in comparison to the normal retina gave an insight into several genes and pathways that were regulated in the tumor. The upregulated and the downregulated genes were further validated by quantitative real time PCR and tissue microarray (TMA) on retinoblastoma tumors. Theoverall goal is to determine the global gene expression profile in retinoblastoma tumors which is first of its kind on a whole genome microarray. Two coloured microarray:retinoblastoma tumor (4 samples) vs. normal retina (4 samples).
Project description:In order to identify the gene targets of frequently altered chromosomal regions in retinoblastoma, a meta-analysis of genome-wide copy number alterations studies on primary retinoblastoma tissue and retinoblastoma cell lines was performed. Published studies were complemented by copy number and gene expression analysis on primary and cell line samples of retinoblastoma. This dataset includes the gene expression data of the retinoblastoma cell lines This data set contains the gene expression (Affymetrix human genome u133 plus 2.0 PM) results for 7 unique retinoblastoma cell lines. For one of the 7 unique cell lines, 3 RNA isolations were performed and were profiled on seperate arrays, adding up to 9 unique array files. Copy number data for primary retinoblastoma (tumor and blood DNA) and retinoblastoma cell lines are available (controlled-access) at the European Genomics Archive. Gene expression data of primary retinoblastoma is available under GSE59983. The GSE59983 records represent the primary tissue gene expression data and the CN data will be deposited into a controlled-access database, probably EGA.