ChIP-seq following AATF in BIU-87 cells
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE248243 | GEO | 2023/11/25
REPOSITORIES: GEO
Similar Datasets
Project description:Differentially expressed genes were identified by comparing the gene expression profiling of BIU-87 of AATF silencing with that of control. Results provide important information to indicate Effect of AATF silencing on BIU-87.
2023-11-22 | GSE248071 | GEO
Project description:Human nephronophthisis and related ciliopathies suggest a link between ciliary signaling defects and altered DNA damage responses. The goal of our study is to elucidate the molecular link of both signaling systems as well as the role of altered DNA damage responses in kidney degeneration and fibrosis. The kinase-regulated DNA damage response target Apoptosis Antagonizing Transcription Factor (Aatf) is a master regulator of the p53 response. Upon genetic deletion of Aatf in renal tubular cells we induce progressive renal failure and a phenotype closely resembling human nephronophthisis in mice and are able to show Aatf as a regulator of primary cilia and modulator of the DNA damage response connecting two pathogenetic concepts of nephronophthisis and nephronophthisis-related ciliopathies. The analysis of the RNA-sequencing of four Aatf-knockout mice and four wildtype mice supports the experimental findings.
2019-03-31 | E-MTAB-7077 | biostudies-arrayexpress
Project description:AATF is a predominantly nuclear protein that has been shown to be an apoptosis-inhibiting factor essential for both embryonic development and tumor growth. Several studies have shown a role of AATF in the modulation of pivotal cellular signal transduction pathways such as p53-, mTOR- and HIF-signaling. However, the exact molecular functions underlying its essential nature to cell proliferation and survival have remained elusive. Interestingly, several lines of evidence point towards a pivotal role of this protein in ribosome biogenesis and the maturation of ribosomal RNA. The function of AATF in this process is not clear, especially since the identity of the RNA-binding protein that links the AATF-containing protein complex (ANN) to rRNA precursors is unknown. In this study, we identify AATF in a screen for RNA-binding proteins. Importantly, AATF does not only bind to polyA-tailed RNA but CLIP-experiments reveal its association with ribosomal RNA. The RNA-binding domain of AATF is essential to maintain its positive effect on cellular rRNA levels. Furthermore, AATF binds to both mRNAs encoding for ribosome biogenesis factors as well as proteins involved with this process indicating AATF to be a central hub for the coordination of ribosome maturation. Consequently, our data for the first time identify the molecular basis to the role of AATF in ribosome biosynthesis and corroborate the link between tumorigenesis and ribosome biology.
2019-08-13 | PXD011055 | Pride
Project description:We investigated the interactions of AATF/Che1 with paraspeckles complex in Multiple Myeloma(MM) cells by looking at its relationship with lncRNA NEAT1_1(NEAT1) and the essential paraspeckles proteins. By analyzing ChIP- and ChIRP-sequencing of MM cells, we assessed that the interaction between AATF/Che1 and NEAT1 occurs also onto DNA and detected the sites where they co-localize. To better characterize the interaction, we studied the effects of interfering AATF/Che1 or NEAT1 on co-localizing sites through ChIP-seq with NEAT1 interfered (GapmerNEAT1) and ChIRP-seq with AATF/Che1 interfered (siChe). We found that NEAT1 is essential in maintaining the paraspeckles complex onto those sites. Moreover, by exploring DRIP-seq data with siChe, we also detected that AATF/Che1 and NEAT1 localize on R-loops, RNA:DNA hybrid structure involved in DNA transcription and repair. A depletion of AATF/Che1 causes a further increase of those hybrid structures and the activation of the immune response in MM, in particular the interferon (IFN) activation. To further explore these findings, we performed RNA-seq with siChe and GapmerNEAT1 which confirm that AATF/Che-1 down-regulation induces a strong up-regulation of genes involved in IFN response.
2022-07-06 | GSE178868 | GEO
Project description:Methylophilus sp. 87 genome sequencing
| PRJNA346769 | ENA
Project description:Myxozyma melibiosi Phaff 52-87 Transcriptome - Phaff 52-87-R
| PRJNA500009 | ENA
Project description:Multiple myeloma is a hematological neoplasm of plasma cells characterized by an abnormal production of immunoglobulins. Che-1/AATF (Che-1) is an RNA binding protein involved in transcription regulation and highly expressed in this malignancy. In order to better characterize its functions in this type of disease, we performed co-immunoprecipitation experiments coupled with a mass-spec analysis by using total MM Kms27 cell lysates. From this analysis we were able to identify more than 600 proteins significantly enriched in Che-1 precipitates. As expected from its role in ribosomal RNA maturation, the Che-1 interactome contains numerous proteins involved in pre-rRNA processing and several ribosomal proteins. Notably, among other proteins interacting with Che-1, we identified many essential components of the paraspeckle which play an important role in the regulation of gene expression.
2022-08-03 | PXD026659 | Pride
Project description:Sinorhizobium meliloti 87 Resequencing
| PRJNA501453 | ENA
Project description:The activation of the transcription factor Hypoxia-inducible factor-1 (HIF-1) plays an essential role in tumor development, tumor progression and resistance to chemo- and radiotherapy. In order to identify compounds targeting the HIF pathway, a small-molecule library was screened using a luciferase-driven HIF-1 reporter cell line under hypoxia. The high throughput screen led to the identification of a class of aminoalkyl-substituted compounds that inhibited hypoxia-induced HIF-1 target gene expression in human lung cancer cell lines at low nanomolar concentrations but did not affect expression levels of genes outside of the HIF-1 pathway. Lead structure BAY 87-2243 was found to inhibit HIF-1α protein accumulation under hypoxic conditions in NSCLC cell line H460 but had no effect on HIF-1α protein accumulation and HIF target gene expression in RCC4 cells lacking VHL activity or in H460 cells after inhibition of HIF prolyl hydroxylase activity. BAY 87-2243 had no effect on HIF-α-mRNA levels. Antitumor activity of BAY 87-2243 and suppression of HIF-1 target gene expression in vivo was demonstrated in a H460 xenograft model. BAY 87-2243 did not inhibit cell proliferation under standard conditions. However under glucose depletion, a condition favoring mitochondrial ATP generation as energy source, BAY 87-2243 inhibited cell proliferation in the nanomolar range. Further experiments revealed that BAY 87-2243 inhibits mitochondrial production of reactive oxygen species (ROS) by blocking complex I activity but has no effect on complex III activity. Lowering of mitochondrial ROS production to reduce hypoxia-induced HIF-1 activity in tumors might be an interesting therapeutic approach to overcome chemo- and radiotherapy-resistance of hypoxic tumors. We used microarrays to detail the global programme of gene expression that is induced in NSCLC cell line H460 upon hypoxia (16 h incubation at 1 % pO2) and evaluated a dose-dependent effect of our HIF-1-pathway inhibitor BAY 87-2243 on genes tthat are affected by hypoxia. Specificity of BAY 87-2243 for the suppression of HIF-1-mediated gene transcription on a genome-wide scale was evaluated by microarray hybridizations using Affymetrix GeneChip Human Gene 1.0 ST arrays. RNA from normoxic H460 cells and from hypoxic H460 cells incubated with 1, 10 and 100 nM BAY 87-2243 respectively was subjected to array hybridization. Of those 30 genes that were most strongly suppressed by 100 nM BAY 87-2243 in hypoxic H460 cells compared to DMSO-treated hypoxic H460 cells, virtually all of them are induced by prior hypoxia and most of these genes have been described in the literature as HIF-1 target genes
2012-12-08 | E-GEOD-42791 | biostudies-arrayexpress