High-throughput profiling of mRNA from parental and Enzalutamide resistant C4-2b prostate cancer cell lines
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ABSTRACT: We established an enzalutamide-resistant C4-2b prostate cell line that has an active androgen receptor by maintaining the C4-2b cell line in serially increasing concentrations of enzalutamide. Among the CRPC cell lines, we selected the C4-2b cell line because it is known to have AR variants, and we desired to identify enzymes with the ability to regulate the activity of AR variants as well as the wild type AR. After 2 months, we acquired resistant cells in even 10 uM enzalutamide. After validation of enzalutamide-resistant character, we analyzed global changes in mRNA expression by using quantitative mRNA-sequencing analysis.
Project description:Prostate cancer C4-2B cells were cultured in enzalutamide in a dose-escalation manner. After sixty passages cells were resistant to enzalutamide, with a specific sets of genes been deregulated. We performed global gene expression analysis by cDNA microarrays to identify genes responsible for enzalutamide resistance in C4-2B-MDVR cells. Enzalutamide resistant C4-2B-MDVR cells were selected from C4-2B cells during long time enzalutamide treatment. Genes responsible for enzalutamide resistance were identified using C4-2B vs. C4-2B-MDVR RNA extraction and hybridization on Affymetrix microarrays.
Project description:The overall goal of this study was to identify genes differentially expressed in enzalutamide-sensitive (C4-2B Con) and enzalutamide-resistant (C4-2B ENZR) C4-2B cells.
Project description:Prostate cancer C4-2B cells were cultured in enzalutamide in a dose-escalation manner. After sixty passages cells were resistant to enzalutamide, with a specific sets of genes been deregulated. We performed global gene expression analysis by cDNA microarrays to identify genes responsible for enzalutamide resistance in C4-2B-MDVR cells.
Project description:To explore the gene regulatory mechanisms underlying PTUPB treatment in drug-resistant prostate cancer cells. We performed RNA sequencing analyses using PTUPB-treated C4-2B MDVR cells with or without enzalutamide treatment to identify the gene programs affected by the treatments.
Project description:MDA PCa 2b is an androgen-responsive, AR-positive prostate cancer cell line. Here, we report the generation of an Enzalutamide-resistant derivative, MDA PCa 2b-EnzaR. Gene expression of MDA PCa 2b-EnzaR compared to its parental counterpart were assessed by short-read RNA sequencing.
Project description:The overall goal of this study was to identify genes that were differentially-expressed in C4-2B MDVR cells treated with Indocin. C4-2B MDVR were either treated with Indocin (20 uM) or DMSO vehicle control for 3 days, followed by isolation of total cellular RNA. Transcriptome analysis was performed with RNA-Sequencing (RNA-Seq) in order to identify differentially-expressed genes (DEGs) induced by Indocin treatment.
Project description:To explore the potential drug target candidate in enzalutamide-resistant PCa, the differential abundances of transcripts between enzalutamide-resistant C4-2 Enz-R and C4-2 cells were examined.
Project description:Prostate cancer is the second leading cause of cancer death among men in the United States. The androgen receptor (AR) antagonist enzalutamide is a FDA-approved drug for treatment of patients with late-stage prostate cancer and is currently under clinical study for early-stage prostate cancer treatment. After a short positive response period to enzalutamide, tumors will develop drug resistance. In this study, we uncovered that DNA methylation was deregulated in enzalutamide-resistant cells. DNMT activity and DNMT3B expression were upregulated in resistant cell lines. Enzalutamide induced the expression of DNMT3A and DNMT3B in prostate cancer cells with a potential role of p53 and pRB in this process. The overexpression of DNMT3B3, a DNMT3B variant, promoted an enzalutamide-resistant phenotype in C4-2B cell lines. Inhibition of DNA methylation and DNMT3B knockdown induced a re-sensitization to enzalutamide. Decitabine treatment in enzalutamide-resistant cells induced a decrease of the expression of AR-V7 and changes of genes for apoptosis, DNA repair and mRNA splicing. Combination treatment of Decitabine and enzalutamide induced a decrease of tumor weight, Ki-67 and AR-V7 expression and an increase of cleaved-caspase3 levels in 22Rv1 xenografts. The collective results suggest that DNA methylation pathway is deregulated after enzalutamide resistance onset and that targeting DNA methyltransferases restores the sensitivity to enzalutamide in prostate cancer cells.