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Next Generation Sequencing analysis using SPOP mutant (F133V)-transduced RM-1-BM mouse prostate cancer cells and RAW264.7 mouse macrophage cells

ABSTRACT: In this experiment, we analyzed the gene expression profiles of SPOP mutant (F133V)-transduced (and vector control) RM-1-BM mouse prostate cancer cells and RAW264.7 macrophage cells in transwell coculture and monoculture in the context of olaparib (or vehicle) treatment by RNA sequencing.

ORGANISM(S): Mus musculus

PROVIDER: GSE240199 | GEO | 2023/08/07

REPOSITORIES: GEO

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Next Generation Sequencing analysis using SPOP mutant (F133V)-transduced RM-1-BM mouse prostate cancer cells and RAW264.7 mouse macrophage cells

Project description:Next Generation Sequencing analysis using SPOP mutant (F133V)-transduced RM-1-BM mouse prostate cancer cells and RAW264.7 mouse macrophage cells

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Effects of SPOP on gene expression in prostate cancer

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

Rhizobium sp. RM strain:RM

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Stable over expression of the SPOP-substrate ZMYND11 in VCaP cells

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

SPOP mutation - SPOP Mutation Drives Prostate Tumorigenesis In Vivo through Coordinate Regulation of PI3K/mTOR and AR Signaling

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

Gene Expression Profiling of SPOP Knocked Down Cell

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.

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Identification of ZMYND11 binding sites in VCaP cells with stable overexpression of either mutant (Y87C) or wild-type SPOP.

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

E3 ligase substrate adaptor SPOP fine tunes the UPR of pancreatic beta cells

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

Comparative transcriptional analysis of Desulfovibrio alaskensis G20 grown under various syntrophic and fermentative conditions on pyruvate relative to respiratory growth

Project description:Pyruvate fermentation pathway and energetics of Desulfovibrio alaskensis strain G20 under syntrophic coculture and fermentative monoculture conditions Expression data for Desulfovibrio alaskensis strain G20 grown in chemostats on pyruvate under respiratory conditions (sulfate-limited and pyruvate-limited monoculture, dilution rate 0.047 and 0.027 h-1), fermentative conditions (monoculture, dilution rate 0.036 h-1), and syntrophic conditions (coculture with Methanococcus maripaludis or Methanospirillum hungatei, dilution rate of 0.047 and 0.027 h-1) 2 replicates each for syntrophic coculture (M. maripaludis or M. hungatei pairing) and respiratory (sulfate- or pyruvate-limited) monoculture for both growth rates (0.027 and 0.047 h-1), and 4 replicates fermentative monoculture (gas flow rate through head space of bioreactor 10 ml/min (chemostats C91 and C93) or 1 ml/min (chemostats C92 and C94)

2013-12-12 | E-GEOD-53226 | biostudies-arrayexpress

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