Gene expression profilings of human prostate cancer DU145 cells with SPOP, PTEN and SOX4 knockdown
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PROVIDER: PRJNA631743 | ENA |
REPOSITORIES: ENA
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Project description:We aimed at analyzing the transcriptome changes associated with SPOP mutation in DU145 cells
2020-07-15 | GSE147090 | GEO
Project description:Effects of SPOP mutation in DU145 cells
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Project description:Recurrent point mutations in SPOP define a distinct molecular subclass of prostate cancer. Here, we describe the first mouse model showing that mutant SPOP drives prostate tumorigenesis in vivo. Conditional expression of mutant SPOP in the prostate dramatically altered phenotypes in the setting of Pten loss, with early neoplastic lesions (high-grade prostatic intraepithelial neoplasia) with striking nuclear atypia, and invasive poorly differentiated carcinoma. In mouse prostate organoids, mutant SPOP drove increased proliferation and a transcriptional signature consistent with human prostate cancer. Using these models and human prostate cancer samples, we show that SPOP mutation activates both PI3K/mTOR and androgen receptor (AR) signaling, effectively uncoupling the normal negative feedback between these two pathways. Associated RNA-seq data deposited in GEO: GSE94839.
2017-03-20 | PXD005309 | Pride
Project description:SPOP is a ubiquitin ligase adaptor frequently mutated in prostate cancer. It is involved in ubiquitination and degradation of substrate proteins. We examined the impact of wild-type and mutant SPOP on the transcriptional profile of prostate cancer cells. We cloned several naturally occurring (in human prostate cancer) SPOP mutants and expressed the corresponding constructs in prostate cancer cells. Our experimental conditions were: Human prostate cancer cells (LNCaP-Abl), transfected with control vector, SPOP-wt, and any of the following mutants: SPOP-F102C, SPOP-F133V, SPOP-F133L (2-4 biological replicates each). We analyzed their gene expression profiles for differences induced by SPOP-wt vs SPOP-mutant.
2014-10-10 | E-GEOD-59432 | biostudies-arrayexpress
Project description:SPOP is known to bind to serine/theronine-rich degrons on substrate proteins. We identified two degron sequences within the PWWP and MYND domain of ZMYND11, a novel SPOP substrate, and investigated whether ZMYND11 may contribute to the transcriptional output of mutant SPOP in VCaP cancer cells. Hence, we performed over-expression of degron-deficient ZMYND11 and degron-deficient ZMYND11 with W294A mutation in VCaP cells. While WT ZMYND11 constructs can be robustly over-expressed at the mRNA level, only the degron-deficient variants yielded a robost increase in ZMYND11 protein expression. Degron mutant-induced transcriptional perturbations partially mimicked SPOP mutant-induced gene expression changes, suggesting that ZMYND11 is sufficient to recapitulate certain features of mutant SPOP.
2020-12-16 | E-MTAB-7173 | biostudies-arrayexpress
Project description:SPOP is one of the most frequent mutated genes in prostate cancer. In the current study, we identified CCNE1 as its substrate. SPOP directly interacts with CCNE1, poly-ubiquitinates CCNE1 in vivo and in vitro, and represses cancer-related phenotypes induced by CCNE1 expression. Thus, we reveal a new mechanism for SPOP in repressing prostate cancer tumorigenesis.
2018-10-03 | GSE100743 | GEO
Project description:SPOP is known to bind to serine/theronine-rich degrons on substrate proteins. We identified two degron sequences within the PWWP and MYND domain of ZMYND11, a novel SPOP substrate, and investigated whether ZMYND11 may contribute to the transcriptional output of mutant SPOP in VCaP cancer cells. We mapped the genomic occupancy of ZMYND11 in VCaP cells over-expressing either wild type SPOP or the recurrent SPOP-Y87C mutant by ChIPseq. Genomic binding sites in the SPOP-Y87C mutant were increased over wild type SPOP, consistent with the increased ZMYND11 expression levels in the former.
2020-12-05 | E-MTAB-7174 | biostudies-arrayexpress
Project description:The Cullin-3 E3 ligase adaptor protein, SPOP, targets proteins for ubiquitination and proteasomal degradation. We previously established the β cell transcription factor (TF) and human diabetes gene PDX1 as an SPOP substrate, suggesting a functional role for SPOP in the β cell. Here, we generated a β cell specific Spop deletion mouse strain (SpopβKO) and found that Spop is necessary to prevent aberrant basal insulin secretion and for maintaining glucose- stimulated insulin secretion (GSIS) through impacts on glycolysis and glucose-stimulated calcium flux. Integration of proteomic, TF-regulatory gene network and biochemical analyses identified XBP1 as a functionally important SPOP substrate in pancreatic β cells. Further, loss of SPOP strengthened the IRE1α-XBP1 axis of unfolded protein response (UPR) signaling. ER stress promoted proteasomal degradation of SPOP, supporting a model whereby SPOP fine-tunes XBP1 activation during the UPR. These results position SPOP as a regulator of β cell function and proper UPR activation.
2024-12-02 | GSE282084 | GEO
Project description:The Cullin 3 E3 ligase adaptor protein, SPOP, targets proteins for ubiquitination and proteasomal degradation. We previously established the β cell transcription factor (TF) and human diabetes gene PDX1 as an SPOP substrate, suggesting a functional role for SPOP in the β cell. Here, we generated a β cell specific Spop deletion mouse strain (SpopβKO) and found that Spop is necessary to prevent aberrant basal insulin secretion and for maintaining glucose- stimulated insulin secretion (GSIS) through impacts on glycolysis and glucose-stimulated calcium flux. Integration of proteomic, TF-regulatory gene network and biochemical analyses identified XBP1 as a functionally important SPOP substrate in pancreatic β cells.Further, loss of SPOP strengthened the IRE1α-XBP1 axis of unfolded protein response (UPR) signaling. ER stress promoted proteasomal degradation of SPOP, supporting a model whereby SPOP fine-tunes XBP1 activation during the UPR. These results position SPOP as a regulatorof β cell function and proper UPR activation.
2024-11-12 | PXD052527 | Pride
Project description:We knocked down SOX4 in T24 cell and created 3 cell lines: T24-scrambled, T24-SOX4-knockdown and T24-SOX4-rescue and compared gene expression changes SOX4 is a developmental transcription factor that is overexpressed in as many as 23% of bladder cancer patients, but the role of SOX4 in bladder cancer tumorigenesis is not well understood. Given SOX4’s many roles in embryonic development and context-dependent regulation of gene expression, we sought to understand SOX4’s contribution to bladder cancer and to elucidate SOX4 regulated genes that might contribute to tumorigenesis. We employed a CRISPR interference (CRISPRi) method to transcriptionally repress SOX4 expression in T24 bladder cancer cell lines, rescued these cell lines with lentivirally expressed SOX4, and performed whole genome expression profiling. SOX4 knockdown cells exhibited decreased invasive capabilities but no changes in migration or proliferation, while rescue with SOX4 lentiviral vector restored the invasive phenotype. Gene expression profiling revealed 173 high confidence SOX4 regulated genes
2018-08-16 | GSE118572 | GEO