Epigenetic Activation and alteration of chromatin structure regulated by NSD2 in metastatic castration-resistant prostate cancer (Hi-C)
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE248627 | GEO | 2024/09/04
REPOSITORIES: GEO
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Project description:To elucidate the regulation of NSD2 in metastatic castration-resistant prostate cancer(CRPC), we performed ChIP-seq of H3K36me2, H3K27me3, H3K4me1, H3K4me3,H3K27ac and NSD2 against castration-sensitive prostate cancer cell line LNCaP and metastatic castration-resistant prostate cancer cell lines, PC3 and DU145, respectively. In metastatic CRPC, we found specific regions of activation with epigenetic changes.
2024-09-04 | GSE248628 | GEO
Project description:To elucidate the regulation of NSD2 in metastatic castration-resistant prostate cancer(CRPC), we performed ChIP-seq of H3K36me2, H3K27me3, H3K4me1, H3K4me3,H3K27ac and NSD2 against castration-sensitive prostate cancer cell line LNCaP and metastatic castration-resistant prostate cancer cell lines, PC3 and DU145, respectively. In metastatic CRPC, we found specific regions of activation with epigenetic changes.
2024-09-04 | GSE248629 | GEO
Project description:Prostate cancer is the most common cancer in men and AR downstream signalings promote prostate cancer cell proliferation. Androgen-deprivation therapy is the first-line treatment strategy for advanced prostate cancer. However, many tumors develop to castration-resistant prostate cancer (CRPC) and relapse. Thus, analyzing key factors for development of CRPC is important. We found PSF functions as RNA binding protein and transcription factor to promote castration-resistant tumor growth. High expression of PSF in metastatic prostate cancer tissue indicates the clinical relevance. In order to investigate the PSF function in CRPC cells, we performed gene expression in CRPC model cells derived from AR-positive prostate cancer cell lines after siPSF treatment.
2017-12-24 | GSE100239 | GEO
Project description:Prostate cancer is the most common cancer in men and AR downstream signalings promote prostate cancer cell proliferation. Although initially hormone-deprovation therapy is effective to inhibit cancer progression, most of cancers relapse as castration-resistant prostate cancer (CRPC). In this study, we examined the effect of OCT4 or NRF1 knockdown in CRPC cells. In order to investigate the OCT4 and NRF1 function in CRPC cells, we performed gene expression in AR-positive CRPC cell line, 22Rv1, AR-negative CRPC cell lines, PC3-CR (Cabazitaxel resistant), DU145, and DU145-CR, after siOCT4 (10 nM) or siNRF1 (10 nM) treatment. We also treated cells with vehicle, ribavirin (riba), or dihydrotestosterone (DHT) to analyzed the effects of thiese drug treatments.
2021-05-01 | GSE146656 | GEO
Project description:We ued CRISPR/Cas9 to knock out EphA2 gene in PC3 cells, and overexpress EphA2 gene in Du145 cells with overexpressed plasmids to explore the underlying mechanisms of EphA2 function in castration-resistant prostate cancer(CRPC) and clinical relevance, providing more evidence for EphA2 as a potential therapeutic target for CRPC.
2024-05-20 | GSE267508 | GEO
Project description:The integration of diverse ‘omic’ datasets will increase our understanding of the key signaling pathways that drive disease. Here, we used clinical tissue cohorts corresponding to lethal metastatic castration resistant prostate cancer (CRPC) obtained at rapid autopsy to integrate mutational, transcriptomic, and phosphoproteomic datasets for pathway analysis. Using Tied Diffusion through Interacting Events (TieDIE), we integrated differentially expressed transcriptional master regulators, functionally mutated genes, and differentially ‘activated’ kinases in CRPC tissues to synthesize a robust signaling network consisting of pathways with known and novel gene interactions. For 6 individual CRPC patients for which we had transcriptomic and phosphoproteomic data we observed distinct pathway activation states for each patient profile. In one patient, the activated pathways were strikingly similar to a prostate cancer cell line, 22Rv1, providing us with a good pre-clinical model to test targeted, combination therapies. In all, synthesis of multiple ‘omic’ datasets revealed a plethora of pathway information suitable for targeted therapies in lethal prostate cancer.
2016-08-19 | PXD002286 | Pride
Project description:Relatively little is known about how changes in gene copy number (CN) and gene CpG methylation interact to affect specific pathways in metastatic castration-resistant prostate cancer (CRPC). Oligonucleotide array comparative genomic hybridization (aCGH) was performed on DNA isolated from 15 metastatic CRPC samples. Commonly aberrant genes were evaluated in a confirmatory fashion using PCR, aCGH data from primary tumors, and existing CRPC expression data. Array-based comprehensive CpG methylation was assessed on the same sample set. A total of 495 genes (79 gained, 416 deleted) were CN aberrant in ?66% of the samples by aCGH, and 77 (9 amplified, 68 deleted) had statistically concordant expression including gain of AR and loss of PTEN and RB1. Significant CN differences were seen between the genomes of patients with AR-amplified and AR-unamplified tumors, including common loss of AR repressors in AR-unamplified tumors. The majority of CRPC samples were hypermethylated compared to benign prostate tissue. Simultaneous methylation and heterozygous gene deletion occurred in the tumor suppressor RB1 and in HSD17B2, responsible for testosterone metabolism. Establishment of a comprehensive methylation signature and coupling of epigenomic and structural analyses sheds light on the alterations that allow CRPC to circumvent hormonal therapy and may provide new drug targets for what is currently an incurable disease state. 15 tumor samples taken from 14 men with metastatic castration resistant prostate cancer were analyzed, including two samples from the same patient. No control samples were used for this experiment.
2011-12-06 | E-GEOD-34174 | biostudies-arrayexpress
Project description:The integration of diverse ‘omic’ datasets will increase our understanding of the key signaling pathways that drive disease. Here, we used clinical tissue cohorts corresponding to lethal metastatic castration resistant prostate cancer (CRPC) obtained at rapid autopsy to integrate mutational, transcriptomic, and phosphoproteomic datasets for pathway analysis. Using Tied Diffusion through Interacting Events (TieDIE), we integrated differentially expressed transcriptional master regulators, functionally mutated genes, and differentially ‘activated’ kinases in CRPC tissues to synthesize a robust signaling network consisting of pathways with known and novel gene interactions. For 6 individual CRPC patients for which we had transcriptomic and phosphoproteomic data we observed distinct pathway activation states for each patient profile. In one patient, the activated pathways were strikingly similar to a prostate cancer cell line, 22Rv1, providing us with a good pre-clinical model to test targeted, combination therapies. In all, synthesis of multiple ‘omic’ datasets revealed a plethora of pathway information suitable for targeted therapies in lethal prostate cancer.
2017-03-29 | MSV000080776 | MassIVE
Project description:The enumeration of circulating tumor cells (CTCs) in peripheral blood correlates with clinical outcome in castration-resistant prostate cancer (CRPC). We analyzed the molecular profiling of peripheral blood from 43 metastatic CRPC patients with known CTC content in order to identify genes that may be related to prostate cancer progression. Global gene expression analysis identified the differential expression of 282 genes between samples with ?5 CTCs vs <5 CTCs, 58.6% of which were previously described as over-expressed in prostate cancer (18.9% in primary tumors and 56.1% in metastasis). Those genes were involved in survival functions such as metabolism, signal transduction, gene expression, and cell growth, death, and movement. The expression of selected genes was evaluated by quantitative RT-PCR. This analysis revealed a two-gene model (SELENBP1 and MMP9) with a high significant prognostic ability (HR 6; 95% CI 2.61 - 13.79; P<0.0001). The combination of the two-gene signature plus the CTCs count showed a higher prognostic ability than neither CTCs enumeration nor gene expression alone (P<0.05). This study shows a gene expression profile in PBMNC is associated with CTCs count and clinical outcome in metastatic CRPC, describing genes and pathways potentially associated with CRPC progression. The complete database comprised the expression measurements of 43 metastatic castration-resistant prostate cancer (CRPC) samples and their asociation with the number of circulating tumor cells (CTCs). Twenty of them have a number circulating tumor cells (CTCs) greater than 5.
2015-04-30 | E-GEOD-66532 | biostudies-arrayexpress
Project description:More effective therapeutic approaches for castration-resistant prostate cancer (CRPC) are urgently needed, thus reinforcing the need to understand how prostate tumors progress to castration resistance. We have established a novel mouse xenograft model of prostate cancer, KUCaP-2, which expresses the wild-type androgen receptor (AR) and which produces the prostate-specific antigen (PSA). In this model, tumors regress soon after castration, but then reproducibly restore their ability to proliferate after 1 to 2 months without AR mutation, mimicking the clinical behavior of CRPC. In the present study, we used this model to identify novel therapeutic targets for CRPC. Evaluating tumor tissues at various stages by gene expression profiling, we discovered that the prostaglandin E receptor EP4 subtype (EP4) was significantly upregulated during progression to castration resistance. Immunohistochemical results of human prostate cancer tissues confirmed that EP4 expression was higher in CRPC compared with hormone-naïve prostate cancer. Ectopic overexpression of EP4 in LNCaP cells (LNCaP-EP4 cells) drove proliferation and PSA production in the absence of androgen supplementation in vitro and in vivo. Androgen-independent proliferation of LNCaP-EP4 cells was suppressed when AR expression was attenuated by RNA interference. Treatment of LNCaP-EP4 cells with a specific EP4 antagonist, ONO-AE3-208, decreased intracellular cyclic AMP levels, suppressed PSA production in vitro, and inhibited castration-resistant growth of LNCaP-EP4 or KUCaP-2 tumors in vivo. Our findings reveal that EP4 overexpression, via AR activation, supports an important mechanism for castration-resistant progression of prostate cancer. Furthermore, they prompt further evaluation of EP4 antagonists as a novel therapeutic modality to treat CRPC. 4 samples in each group: androgen-dependent growth (AD), castration-induced regression nadir (ND), and castration-resistant regrowth (CR) stages
2010-06-08 | E-GEOD-21887 | biostudies-arrayexpress