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Comparison of the prostate cancer cell line LNCaP and its androgen insensitive derivative C4-2B

ABSTRACT: LNCaP and its androgen insensitive derivative were profiled in order to identify genes differentially expressed during the conversion to androgen insensitivity. This experiment was performed due to the presence of an ins(7;14) localizing the entire ETV1 locus to chr 14 in LNCaP and C4-2B prostate cancer cells. Keywords: cell type comparison LNCaP and C4-2B were both hybridized to Agilent Whole Human Genome Oligonucleotide Microarrays, with a commercially obtained pool of benign prostate RNA serving as the reference for both cell lines. Dye flips for both cell lines were also performed

ORGANISM(S): Homo sapiens

SUBMITTER: Scott Tomlins

PROVIDER: E-GEOD-7702 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Distinct classes of chromosomal rearrangements create oncogenic ETS gene fusions in prostate cancer.

Tomlins Scott A SA Laxman Bharathi B Dhanasekaran Saravana M SM Helgeson Beth E BE Cao Xuhong X Morris David S DS Menon Anjana A Jing Xiaojun X Cao Qi Q Han Bo B Yu Jindan J Wang Lei L Montie James E JE Rubin Mark A MA Pienta Kenneth J KJ Roulston Diane D Shah Rajal B RB Varambally Sooryanarayana S Mehra Rohit R Chinnaiyan Arul M AM

Nature 20070801 7153

Recently, we identified recurrent gene fusions involving the 5' untranslated region of the androgen-regulated gene TMPRSS2 and the ETS (E26 transformation-specific) family genes ERG, ETV1 or ETV4 in most prostate cancers. Whereas TMPRSS2-ERG fusions are predominant, fewer TMPRSS2-ETV1 cases have been identified than expected on the basis of the frequency of high (outlier) expression of ETV1 (refs 3-13). Here we explore the mechanism of ETV1 outlier expression in human prostate tumours and prosta ...[more]

PMID: 17671502

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Comparison of the prostate cancer cell line LNCaP and its androgen insensitive derivative C4-2B

Project description:LNCaP and its androgen insensitive derivative were profiled in order to identify genes differentially expressed during the conversion to androgen insensitivity. This experiment was performed due to the presence of an ins(7;14) localizing the entire ETV1 locus to chr 14 in LNCaP and C4-2B prostate cancer cells. Keywords: cell type comparison

2007-08-07 | GSE7702 | GEO

Neuropilin-2 regulates androgen-receptor transcriptional activity in advanced prostate cancer [RNA-seq]

Project description:Gene expression was first compared between control and NRP2 depletd condition in prostate adenocarcinoma cell line LNCaP C4-2B . In the next set, we compared the gene expression between control and AR deplted state in LNCaP C4-2B cells.

2022-06-03 | GSE205149 | GEO

Microarray analysis of gene expression differences in prostate specific antigen negative (PSA-ve) cells versus PSA+ve cells in LAPC9 and LNCaP prostate cancer (PCa) cells

Project description:Prostate cancer (PCa) is heterogeneous containing both phenotypically differentiated and undifferentiated tumor cells. An important unanswered question is whether these two populations of PCa cells are functionally different. Here we report the distinct molecular, cellular, and tumor-propagating properties of PCa cells that express high (i.e., PSA+) and low (PSA-/lo) levels of the differentiation marker PSA (prostatespecific antigen). PSA-/lo PCa cells are quiescent and resistant to multiple stresses including androgen deprivation, exhibit high clonogenic potential, and possess long-term tumor-propagating capacity in male mice. They preferentially express stem cell-associated genes and can undergo asymmetric cell division generating PSA+ cells. Importantly, PSA-/lo PCa cells can initiate robust tumor development in castrated hosts, survive androgen deprivation, and harbor highly tumorigenic castration-resistant PCa cells that can be further enriched using the ALDH+CD44+α2β1+ phenotype. In contrast, PSA+ PCa cells possess more limited tumor-propagating capacity, mainly undergo symmetric division, and are sensitive to castration. Together, our study suggests that PSA-/lo and PSA+ PCa cells are functionally distinct and PSA-/lo cells may represent one critical source of castration-resistant PCa cells. There are two sets of samples in this study corresponding to two different prostate cancer cell lines LNCaP and LAPC9. Both LNCaP and LAPC9 sets include 3 technical triplicates each that were performed onvdual color arrays and each individual array includes comparison between PSA- (Cy5) and PSA+ (Cy3) cells of the respective cell line.

2012-05-09 | E-GEOD-30114 | biostudies-arrayexpress

HOTAIR or shHOTAIR lentiviral infected prostate cancer cells [ChIP-Seq]

Project description:LNCaP prostate cancer cells were infected by lentivirus expressing either ctrl or HOTAIR, and the cells were cultured in hormone-deprived condition (Ethl) or in the presence of androgen (R1881). C4-2B prostate cancer cells were infected by lentivirus expressing either shCtrl or shHOTAIR, and the cells were cultured in hormone-deprived condition (Ethl) or in the presence of androgen (R1881).

2015-10-01 | GSE61268 | GEO

Complex modulation of androgen responsive gene expression by methoxyacetic acid

Project description:Optimal androgen signaling is critical for testicular development and spermatogenesis. Methoxyacetic acid (MAA), the primary active metabolite of the industrial chemical ethylene glycol monomethyl ether, disrupts spermatogenesis and causes testicular atrophy. Transcriptional trans-activation studies have indicated that MAA can enhance androgen receptor activity, however, whether MAA actually impacts the expression of androgen-responsive genes in vivo, and which genes might be affected is not known. A mouse TM3 Leydig cell line that stably expresses androgen receptor (TM3-AR) was prepared and analyzed by transcriptional profiling to identify target gene interactions between MAA and testosterone on a global scale. MAA is shown to have widespread effects on androgen-responsive genes, affecting processes ranging from apoptosis to ion transport, cell adhesion, phosphorylation and transcription, with MAA able to enhance, as well as antagonize, androgenic responses. Moreover, testosterone is shown to exert both positive and negative effects on MAA gene responses. Motif analysis indicated that binding sites for FOX, HOX, LEF/TCF, STAT5 and MEF2 family transcription factors are among the most highly enriched in genes regulated by testosterone and MAA. Notably, 65 FOXO targets were repressed by testosterone or showed repression enhanced by MAA when combined with testosterone; these include 16 genes associated with developmental processes, six of which are Hox genes. These findings highlight the complex interactions between testosterone and MAA, and provide insight into the effects of MAA exposure on androgen-dependent processes in a Leydig cell model. TM3-AR cells (see below) were grown in DMEM-F12 medium containing 5% horse serum and 2.5% FBS. LNCaP cells were maintained in RPMI 1640 containing 10% FBS. RNA was isolated using TRIzol reagent using the manufacturer’s protocol.

2011-04-07 | E-GEOD-27410 | biostudies-arrayexpress

Targeting the MLL complex in castration-resistant prostate cancer [expression]

Project description:Resistance to androgen deprivation therapies and increased androgen receptor (AR) activity are major drivers of castration-resistant prostate cancer (CRPC). Prior work has focused on targeting AR directly; however, the identification and targeting of co-activators of AR signaling remains an underexplored area. Here we demonstrate that the MLL (mixed-lineage leukemia) complex, a well-known contributor in MLL-fusion-positive leukemia, acts as a co-activator of AR signaling. AR interacts with the MLL complex via its subunit, menin. Small molecule inhibition of the menin-MLL interaction blocks AR signaling and inhibits tumor growth in vivo. Furthermore, we find that menin is up-regulated in CRPC and high expression correlates with poor overall survival. Our study identifies the MLL complex as a co-activator of AR that can be targeted in advanced prostate cancer. ASH2L / Menin / MLL1 were knocked down using shRNA /siRNA in two prostate cancer cell lines, VCaP and LNCaP.

2015-03-02 | E-GEOD-60836 | biostudies-arrayexpress

ChIP-sequencing of prostate cancer cells

Project description:Chromatin from LNCaP-C4-2B cells was immunoprecipitated using pY88-H4 or IgG antibodies, followed by sequencing of the ChIP-DNA

2016-03-29 | GSE79658 | GEO

Gene expression in human prostate cancer cell lines regulated by HIC1 gene

Project description:This study aimed to further our understanding of the role that hypermethylatioted in cancer 1 (HIC1) plays in prostate cancer (PCa) development. Microarrays were searched for some genes that had correlated expression with HIC1 mRNA. Our data showed that HIC1 promoter hypermethylation was presented in cell lines, tissues and plasma of PCa patients. According to fold-change screening between restoring expression of HIC1 and its respective control cells, both up-regulated and down-regulated genes were commonly observed in PC3 and C4-2B cells. The restoring expression HIC1 in PCa lines were respectively noted as PC3-HIC1 and C4-2B-HIC1 cells, and the respective controls were noted as C4-2B-GFP and PC3-GFP cells.

2012-11-17 | E-GEOD-42336 | biostudies-arrayexpress

High-throughput profiling of mRNA from parental and Enzalutamide resistant C4-2b prostate cancer cell lines

Project description: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.

2020-02-01 | GSE110802 | GEO

Profiling of RWPE cells stably over-expressing ETV1

Project description:RWPE benign prostatic epithelial cells were infected with a lentivirus expressing ETV1 or GUS (control), and stable clones were isolated by puromycin selection. ETV1 over-expression, recapitulating ETS gene rearrangements observed in vivo, confers invasiveness in the benign prostate cell line RWPE. Keywords: genetic modification Four hybridizations in total were performed using RWPE cells stably expressing ETV1 or GUS (control) on Agilent Whole Human Genome Oligonucleotide Microarrays. RWPE-ETV1 (Cy5) / RWPE-GUS (Cy3) and a dye flip were performed in duplicate

2010-05-27 | E-GEOD-7701 | biostudies-arrayexpress

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