Genome-wide maps of the androgen receptor, pS213 androgen receptor, and 14-3-3 ζ chromatin occupancy in control and PIM1 over-expressing LNCaP cells
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE181224 | GEO | 2021/11/03
REPOSITORIES: GEO
Similar Datasets
Project description:14-3-3 ζ is an androgen receptor (AR) co-activator. To further understand how 14-3-3 ζ may be modulating AR activity, we performed rapid immunoprecipitation mass spectrometry of endogenous proteins for analysis of chromatin complexes (RIME) on AR and 14-3-3 ζ in LNCaP prostate cancer cells in the presence of PIM1. This enabled us to observe what other proteins associate with both 14-3-3 ζ and AR on chromatin. Notably, several of the proteins we identified as associated with both AR and 14-3-3 ζ are known AR co-regulators. We hypothesized that to co-regulate AR, 14-3-3 ζ may be recruiting or altering interactions between AR and AR co-regulators.
2021-11-25 | PXD023634 | Pride
Project description:We previously identified 14-3-3 ζ S64 as a substrate of PIM1 in an in vivo chemical genetic screen. To verify this phosphorylation event and determine whether S64 is the predominant phosphorylation site, we performed in vitro phosphorylation of 14-3-3 ζ by PIM1.
2021-11-25 | PXD023623 | Pride
Project description:Genome-wide maps of the androgen receptor, pS213 androgen receptor, and 14-3-3 ζ chromatin occupancy in control and PIM1 over-expressing LNCaP cells
| PRJNA751082 | ENA
Project description:PIM1 phosphorylation of the androgen receptor and 14-3-3 ζ coordinates their interaction and chromatin occupancy to regulate gene transcription in prostate cancer
| PRJNA751077 | ENA
Project description:It has been estimated that about 11% of cellular genes present a functional E box to which MYC can associate on the genome. MYC silencing demonstrated that MYC recruits PIM1 at specific MYC binding sites and confocal microscopy following growth factor treatment, showed an elevated degree of nuclear co-localization of PIM1 with nascent transcripts and with MYC suggesting that PIM1 is recruited by MYC to a large number of sites. To understand the actual extension of PIM1 and MYC co-operation in gene transcription we performed expression profile analysis of 293 cells silenced either for MYC or PIM1 at 120 minutes after serum treatment. MYC silencing affected the expression of 1026 genes of which 818 were up-regulated and 208 were down-regulated. Comparison of genes regulated by MYC with those regulated by PIM1, by RNAi silencing, showed that PIM1 contributes to the regulation of 207 genes out of the 1026 MYC-regulated genes. Thus, a subset of 20% of MYC-regulated genes, are also regulated by PIM1. The co-regulated includes genes involved in cell metabolism, protein synthesis, cycle progression, and oncogenesis. Interestingly, a large number of genes are transcriptional factors, which suggests that PIM1 participates in MYC-dependent regulatory networks. Experiment Overall Design: The gene expression analysis was performed by hybridizing RNA samples to the Whole Human Genome Oligo Microarray from Agilent Technologies. Samples were obtained from 293 cells, treated with serum for 120 minutes, expressing either two independent MYC shRNA (shMYC#1 and shMYC#2) or their relative scrambled shRNA (shsM#1 and shsM#2) for MYC expression analysis; two independent PIM1 shRNA (shPIM1#1 and shPIM1#2) or their relative scrambled shRNA (shsP#1 and shsP#2) for PIM1 expression analysis.
2008-06-15 | E-GEOD-7960 | biostudies-arrayexpress
Project description:It has been estimated that about 11% of cellular genes present a functional E box to which MYC can associate on the genome. MYC silencing demonstrated that MYC recruits PIM1 at specific MYC binding sites and confocal microscopy following growth factor treatment, showed an elevated degree of nuclear co-localization of PIM1 with nascent transcripts and with MYC suggesting that PIM1 is recruited by MYC to a large number of sites. To understand the actual extension of PIM1 and MYC co-operation in gene transcription we performed expression profile analysis of 293 cells silenced either for MYC or PIM1 at 120 minutes after serum treatment. MYC silencing affected the expression of 1026 genes of which 818 were up-regulated and 208 were down-regulated. Comparison of genes regulated by MYC with those regulated by PIM1, by RNAi silencing, showed that PIM1 contributes to the regulation of 207 genes out of the 1026 MYC-regulated genes. Thus, a subset of 20% of MYC-regulated genes, are also regulated by PIM1. The co-regulated includes genes involved in cell metabolism, protein synthesis, cycle progression, and oncogenesis. Interestingly, a large number of genes are transcriptional factors, which suggests that PIM1 participates in MYC-dependent regulatory networks. Keywords: expression profiles
2007-07-31 | GSE7960 | GEO
Project description:The androgen receptor (AR) has a pivotal role in regulating gene expression in the male reproductive system. Due to the involvement of AR in prostate cancer, its role is best studied in the prostate gland epithelium and prostate cancer cell lines. Here we investigate the transcriptional program of AR in normal human epididymis epithelial (HEE) cells. After AR stimulation of caput HEE cells with the synthetic androgen R1881, AR targets were revealed with RNA-sequencing. Next, AR occupancy genome-wide was determined in control or R1881-stimulated HEE cells by chromatin immunoprecipitation and deep sequencing (ChIP-seq). The results identify about 200 genes that are differentially expressed (DEGs) in HEE cells after AR activation. Some of these DEGs show occupancy of AR at their promoters or cis-regulatory elements suggesting direct regulation. However there is little overlap in AR-associated DEGs between HEE and prostate epithelial cells. Inspection of over-represented motifs in AR ChIP-seq peaks identified CAAT-enhancer binding protein beta (CEBPB) and Runt-related transcription factor 1 (RUNX1) as potential co-factors, with no evidence for FOXA1, which is an important co-factor in the prostate epithelium. CEBPB and RUNX1 ChIP-seq in HEE cells showed that both these factors often occupied AR-binding sites, though rarely simultaneously. Further analysis at a single AR-regulated locus (FK506-binding protein 5, FKPB5) suggests that RUNX1 may inhibit AR occupancy, while CEBP appears to be a co-activator. These data suggest a novel AR transcriptional network governs differentiated functions of the human epididymis epithelium.
2018-08-21 | GSE109061 | GEO
Project description:The androgen receptor (AR) has a pivotal role in regulating gene expression in the male reproductive system. Due to the involvement of AR in prostate cancer, its role is best studied in the prostate gland epithelium and prostate cancer cell lines. Here we investigate the transcriptional program of AR in normal human epididymis epithelial (HEE) cells. After AR stimulation of caput HEE cells with the synthetic androgen R1881, AR targets were revealed with RNA-sequencing. Next, AR occupancy genome-wide was determined in control or R1881-stimulated HEE cells by chromatin immunoprecipitation and deep sequencing (ChIP-seq). The results identify about 200 genes that are differentially expressed (DEGs) in HEE cells after AR activation. Some of these DEGs show occupancy of AR at their promoters or cis-regulatory elements suggesting direct regulation. However there is little overlap in AR-associated DEGs between HEE and prostate epithelial cells. Inspection of over-represented motifs in AR ChIP-seq peaks identified CAAT-enhancer binding protein beta (CEBPB) and Runt-related transcription factor 1 (RUNX1) as potential co-factors, with no evidence for FOXA1, which is an important co-factor in the prostate epithelium. CEBPB and RUNX1 ChIP-seq in HEE cells showed that both these factors often occupied AR-binding sites, though rarely simultaneously. Further analysis at a single AR-regulated locus (FK506-binding protein 5, FKPB5) suggests that RUNX1 may inhibit AR occupancy, while CEBP appears to be a co-activator. These data suggest a novel AR transcriptional network governs differentiated functions of the human epididymis epithelium.
2018-08-21 | GSE109062 | GEO
Project description:PIM1 is a serine/threonine kinase over-expressed in prostate cancer. We have previously shown that PIM1 phosphorylates the androgen receptor (AR), the primary therapeutic target in prostate cancer, at serine 213 (pS213), which alters expression of select AR target genes. Therefore, we sought to investigate the mechanism whereby PIM1 phosphorylation of AR alters its transcriptional activity. We previously identified the AR co-activator, 14-3-3 ζ, as an endogenous PIM1 substrate in LNCaP cells. Here, we show that PIM1 phosphorylation of AR and 14-3-3 ζ coordinates their interaction, and that they extensively occupy the same sites on chromatin in an AR-dependent manner. Their occupancy at a number of genes involved in cell migration and invasion results in a PIM1-dependent increase in the expression of these genes. We also use rapid immunoprecipitation and mass spectrometry of endogenous proteins on chromatin (RIME), to find that select AR co-regulators, such as hnRNPK and TRIM28, interact with both AR and 14-3-3 ζ in PIM1 over-expressing cells. We conclude that PIM1 phosphorylation of AR and 14-3-3 ζ coordinates their interaction, which in turn recruits additional co-regulatory proteins to alter AR transcriptional activity.
| S-EPMC8546101 | biostudies-literature
Project description:Background: PIM1 is a constitutively active serine-threonine kinase regulating cell survival and proliferation. Increased PIM1 expression has been correlated with cancer metastasis by facilitating migration and anti-adhesion. Endothelial cells play a pivotal role in these processes by contributing a barrier to the blood stream. Here, we investigated whether PIM1 regulates mouse aortic endothelial cell (MAEC) monolayer integrity. Methods: Pim1-/-MAEC were isolated from Pim1 knockout mice and used in trypsinization-, wound closure assays, electrical cell-substrate sensing, immunostaining, cDNA transfection and as RNA source for microarray analysis. Results: Pim1-/-MAEC displayed decreased migration, slowed cell detachment and increased electrical resistance across the endothelial monolayer. Reintroduction of Pim1- cDNA into Pim1-/-MAEC significantly restored wildtype adhesive characteristics. Pim1-/--MAEC displayed enhanced focal adhesion and adherens junction structures containing vinculin and M-NM-2-catenin, respectively. Junctional molecules such as Cadherin 13 and matrix components such as Collagen 6a3 were highly upregulated in Pim1-/- cells. Intriguingly, extracellular matrix deposited by Pim1-/- cells alone was sufficient to induce the hyperadhesive phenotype in wildtype endothelial cells. Conclusion: Loss of Pim1 induces a strong adhesive phenotype by enhancing endothelial cell-cell and cell-matrix adhesion by the deposition of a specific extracellular matrix. Targeting PIM1 function therefore might be important to promote endothelial barrier integrity. Pim-1-/- mouse aortic endothelial cells were compared to wildtype cells
2012-10-29 | E-GEOD-32059 | biostudies-arrayexpress