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Unknown,Transcriptomics,Genomics,Proteomics

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Paired human prostate cancer and benign prostate tissues, and LNCaP cells treated with miR-31

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Pei-Chun Lin

PROVIDER: E-GEOD-36803 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Epigenetic repression of miR-31 disrupts androgen receptor homeostasis and contributes to prostate cancer progression.

Lin Pei-Chun PC Chiu Ya-Lin YL Banerjee Samprit S Park Kyung K Mosquera Juan Miguel JM Giannopoulou Eugenia E Alves Pedro P Tewari Ashutosh K AK Gerstein Mark B MB Beltran Himisha H Melnick Ari M AM Elemento Olivier O Demichelis Francesca F Rubin Mark A MA

Cancer research 20121211 3

Androgen receptor signaling plays a critical role in prostate cancer pathogenesis. Yet, the regulation of androgen receptor signaling remains elusive. Even with stringent androgen deprivation therapy, androgen receptor signaling persists. Here, our data suggest that there is a complex interaction between the expression of the tumor suppressor miRNA, miR-31, and androgen receptor signaling. We examined primary and metastatic prostate cancer and found that miR-31 expression was reduced as a result ...[more]

PMID: 23233736

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microRNA profiling in paired human prostate cancer and benign prostate tissue

Project description:To determine the altered microRNA expression signature in human prostate cancer compared to benign prostate tissue. To determine the altered mRNA expression signatures upon overexrpession miR-31 in prostate cancer cells. Two condition experiments:1) Total RNA from 21 pairs of prostate cancers and matched benign prostate tissues were collected and processed for microRNA detection. 2) In LNCaP prostate cancer cells, miR-31 was overexpressed and compared to control miR-NC.

2013-02-05 | E-GEOD-36802 | biostudies-arrayexpress

MicroRNAs may indirectly regulate other microRNAs

Project description:MicroRNAs (miRNAs) are a class of regulatory RNAs that control the expression of genes critical to cell function. Ectopic expression of miRNAs has been shown to result in genome-wide changes in patterns of gene expression. While the reasons for these global alterations in gene expression patterns have been attributed to the ability of miRNAs to target multiple genes, and/or to induce indirect effects downstream of target genes, the molecular basis of indirect effects of miRNA regulation remains poorly understood. In this study, we demonstrate the potential of miRNAs to regulate other miRNAs. Using miRNA microarray analysis, we show that over 70 different miRNAs are differentially expressed ( M-bM-^IM-%1.4 fold, FDR M-bM-^IM-$ 5%) in human ovarian cancer cells after transfection with a single miRNA (miR-7). We present evidence that a major component of miR-7-induced changes in levels of miRNAs is the indirect consequence of miR-7-mediated alterations in levels of protein-coding genes (e.g., transcription and splicing factors) that exert trans-regulatory control on miRNAs. HEY cells were transfected with either hsa-miR-7 (2 biological replicates) or a negative control miRNA, miR-NC (2 biological replicates), and then grown in 6-well plates for ~48 hours. The difference in miRNA expression pattern between the miR-7-transfected cells and the miR-NC-transfected cells was determined using an Affymetrix GeneChip miRNA Array.

2012-04-08 | E-GEOD-29129 | biostudies-arrayexpress

Coordinated regulation of MAPK signaling pathway and microRNA in response to ionizing radiation in lung cancer cells

Project description:microRNA regulates cellular responses to ionizing radiation (IR) through the translational control of target genes. We analyzed time-series changes in microRNA expressions upon γ-irradiation in H1299 lung cancer cell lines using microarray. Significantly changed microRNAs were selected based on ANOVA analysis, target genes of which were enriched to MAPK signaling pathway. Concurrent analysis of mRNA and microRNA uncovered that the expression of miR-26b and its target ATF2 mRNA were inversely correlated in γ-irradiated H1299 cells. The overexpression of miR-26b induced the suppression of ATF2 in γ-irradiated cells. When we inhibit the MAPK signaling pathway using SP600125, JNK inhibitor, the expression of miR-26b was induced even in γ-irradiated H1299 cells. From these results, we concluded that the expression of miR-26b was coordinated regulated by MAPK signaling pathway upon ionizing radiation, and MAPK signaling pathway was regulated by miR-26b in turn. We analyzed the time-series miRNA profiles of radioresistant H1299 cells in response to 2 Gy of ionizing radiation (IR) by performing quadratic regression (QR) analysis to identify genes associated with radioresistance

2011-09-13 | E-GEOD-30075 | biostudies-arrayexpress

Differential expression of mature miRNAs in P19 cells during neuronal differentiation and by Rbfox3 depletion.

Project description:To investigate whether Rbfox3 could alter the expression level of miRNAs during neuronal differentiation of P19 cells, we performed miRNA microarray analysis using the RNAs extracted from untreated (undifferentiated) P19-GFP, RA-treated (neuronally differentiated) P19-GFP, or RA-treated P19-T2 cells. Total 9 samples were analyzed. We compared expression levels of P19-GFP (-) vs P19-GFP (+) vs P19-T2 (+) to identify miRNAs which had changes in expression levels with p < 0.01. From this miRNA list, we compared among P19-GFP (-) vs P19-GFP (+) vs P19-T2 (+) to identify the miRNAs which appeared to correlate with Rbfox3 expression.

2014-09-21 | E-GEOD-52377 | biostudies-arrayexpress

miRNA expression profile in leprosy skin biopsy specimens

Project description:Skin biopsy specimens of skin lesions were profiled for miRNA expression. In this study, we indentified miRNA species that were differentially expressed in the skin lesions of either the lepromatous or tuberculoid forms of leprosy. One miRNA species, hsa-mir-21, found in the lepromatous lesions was capable of downregulating the vitamin D-dependent antimicrobial pathway. Scalpel or punch skin biopsy specimens were obtained after informed consent from patients with tuberculoid leprosy and patients with lepromatous leprosy at the time of diagnosis. Specimens were embedded in OCT medium, snap-frozen in liquid nitrogen and stored at 80°C until sectioning.

2011-12-31 | E-GEOD-33192 | biostudies-arrayexpress

MicroRNA Profiling of Laser-Microdissected Hepatocellular Carcinoma Reveals an Oncogenic Phenotype of the Tumor Capsule

Project description:Tumor cells were microdissected from FFPE sections of hepatocellular carcinoma (HCC) samples. Samples were compared between different localisations either within or around the tumor. miRNA was labeled with the Affymetrix FlashTag Biotin HSR RNA Labeling Kit 6 microdissected hepatocellular carcinoma samples were compared to four different tumor localisations (LC: cirrhotic septa of the tumor-adjacent liver; LP: tumor-adjacent liver parenchyma;TC: fibrinous capsule of the tumor; TP: tumor parenchyma)

2015-01-14 | E-GEOD-54537 | biostudies-arrayexpress

Feasibility of global microRNA analysis from fine-needle biopsy FFPE material in patients with hepatocellular carcinoma treated with sorafenib

Project description:Tumor cells were microdissected from FFPE sections of hepatocellular carcinoma (HCC) samples. micro RNA expression were correlated to clinical outcome and sorafenib-therapy. miRNA was labeled with the Affymetrix FlashTag Biotin HSR RNA Labeling Kit 20 microdissected hepatocellular carcinoma samples with detailed clinical data

2014-07-29 | E-GEOD-56059 | biostudies-arrayexpress

MicroRNA Expression Data From Sham or BDL CD1 Mouse Liver

Project description:Endothelial cells from normal or cirrhotic CD1 mice were screened for changes in microRNA expression using an Affymetrix array. Total RNA (including microRNA) was extracted from whole liver tissue of CD1 mice, and microRNA expression was assessed using an Affymetrix array. N=1 for each condition (cirrhosis induced by bile duct ligation, control).

2011-08-09 | E-GEOD-31293 | biostudies-arrayexpress

Generation of organized anterior foregut epithelia from pluripotent stem cells using small molecules

Project description:Anterior foregut endoderm (AFE) gives rise to many tissue types of interest for therapeutic research including the esophagus, salivary glands, lung, thymus, parathyroid and thyroid. Despite its importance, only few reports describe the generation of AFE from pluripotent stem cells (PSCs) by directed differentiation. Here, we describe a novel protocol to derive a subdomain of AFE, identified by expression of Pax9, from PSCs using small molecules and chemically defined conditions. Generation of a reporter PSC line allows isolation and characterization of Pax9+ AFE cells. When transplanted in vivo, Pax9+ AFE can form several distinct types of complex anterior foregut epithelia including mucosal glands and stratified squamous epithelium. Finally, we show that the directed differentiation protocol can be used to generate AFE from DiGeorge Syndrome patient-specific human induced PSCs, thus creating a platform to produce anterior foregut derivatives for therapy and to enable the study of disorders of the AFE. Total RNA obtained from FACS purified from in vitro dervied mouse definitive endoderm, anterior foregut and ES cells. AFE cells were derived from a 129X1/SvJ background, DE cells from 129X1/SvJ x 129S1/SV-+p+Tyr- cKitlSl-J/+ (R1 ES cells) and non reporter ES cells from a 129P2/OlaHsd background.

2013-04-15 | E-GEOD-42139 | biostudies-arrayexpress

Effect of mitochondria on nuclear gene expression in Drosophila melanogaster

Project description:Five different mitochondrial strains were introgressed in male and female fruit flies with identical (w1118) nuclear genetic background. 40 samples: Five mitochondrial strains, two independent introgressions, two sexes, two biological replicates.

2011-01-09 | E-GEOD-24729 | biostudies-arrayexpress

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