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Gene Expression in 70Z/3 pre-B cells Stably Overexpressing Individual members of the mirn23a MiRNA Cluster

ABSTRACT: Expression of the mirn23a cluster in murine hematopoietic progenitors blocks B cell development. Overexpressed individual cluster members miRs-23a, 24-2, and -27a in 70/3 mouse pre-B cells in order to examine changes in gene expression that would potentially reveal targets of the miRs relevant to hematopoiesis. Two independent 70Z/3 cell lines for each experimental group were generated (MSCV, miR-23a, miR-24-2, and miR-27a). RNA was generated and hybridized on Affymetrix microarrays.

ORGANISM(S): Mus musculus

SUBMITTER: Richard Dahl

PROVIDER: E-GEOD-65874 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Gene Expression in 70Z/3 pre-B cells Stably Overexpressing Individual members of the mirn23a MiRNA Cluster

Project description:Expression of the mirn23a cluster in murine hematopoietic progenitors blocks B cell development. Overexpressed individual cluster members miRs-23a, 24-2, and -27a in 70/3 mouse pre-B cells in order to examine changes in gene expression that would potentially reveal targets of the miRs relevant to hematopoiesis.

2015-02-12 | GSE65874 | GEO

Integrating CRISPR knockout, interference, and activation to dissect the functional role and underlying signaling of microRNA-23a-27a-24-2 cluster in hepatocellular carcinoma

Project description:The miR-23a-27a-24-2 cluster is overexpressed in human cancers, including hepatocellular carcinoma (HCC). However, the role of three mature miRNAs of the miR-23a-27a-24-2 cluster in HCC is still controversial. Also, the integrative role of the miR-23a-27a-24-2 cluster in HCC remains elusive. In the present study, using CRISPR knockout (KO), CRISPR interference (CRISPRi), and CRISPR activation (CRISPRa) technologies, we established an endogenous miR-23a-27a-24-2 controllable and various knockout (KO) cell models, which were used to dissect the functional role and underlying signaling of the miR-23a-27a-24-2 cluster. Either miR-23a KO or miR-27a KO reduced cell growth in vitro and in vivo. Of particular note, endogenous miRNAs in the miR-23a-27a-24-2 cluster were effectively regulated by CRISPRi/a, identifying an integrated oncogenic role of the miR-23a-27a-24-2 cluster in HCC cells. Functional analysis showed that miR-23a KO and miR-27a KO led the cell cycle arrest, especially at the G2/M phase, by reducing CDK1/cyclin B activation in HCC cells. Furthermore, a high-throughput RNA-seq approach with miRNA target prediction identified the miR-23a/miR-27a-regulated gene network, further validated by various technologies. In addition, miR-23a and miR-27a have opposite roles in cell migration and mesenchymal-epithelial transition. However, an integrated analysis by CRISPRi/a suggested an oncogenic role of the miR-23a-27a-24-2 cluster in cell migration, which may require a miR-23a-BMPR2-Smad-Snail axis in HCC cells. Thus, our CRISPRi/a study offers a valuable research tool for dissecting the integrated role and underlying mechanism of an endogenous miRNA cluster. Also, this CRISPR approach may provide new routes of miRNA intervention for miRNA targeted therapy.

2024-09-30 | GSE199332 | GEO

Differential expression of genes after over expression of miR-23a~27a~24-2 cluster in human embryonic kidney cells

2010-07-02 | GSE20158 | GEO

Differential expression of genes after over expression of miR-23a~27a~24-2 cluster in human embryonic kidney cells

Project description:The experiment was deigned to identify the genes which get altered after the over expression of miR-23a~27a~24-2 cluster in HEK293T cells. The HEK293T cells plated in 6-well plate were transfected with two different concentrations of cloned miRNA cluster i.e 2micrograms and 4micrograms per well. Biological duplicates of 3 samples were used viz. control HEK293T cells, HEK293T cells transfected with 2micrograms of the cloned cluster and HEK293T cells transfected with 4micrograms of the cloned cluster.

2010-07-30 | E-GEOD-20158 | biostudies-arrayexpress

Mouse Articular chondrocyte LC-MSMS of wild-type, miR-26a -/- and cartilage-specific miR-23ab clusters knockout mice

Project description:To reveal the potential regulation target genes of miR-26a and miR-23a/b clusters in articular chondrocytes, we performed a multi-omics analysis of LC-MSMS and RNA-seq using cultured chondrocytes samples, which were primarily isolated from 3-week-old wild-type, miR-26a -/- (with or without miR-26a mimic transfection afterwards) or miR-23a/b cluster flox/flox;Col2a1-cre mice. For LC-MSMS, protein from TRIZOL reagent was extracted, nanoLC-MSMS was performed. An expression list was made to further explore the regulation targets of miR-26a and miR-23a/b clusters.

2023-01-25 | PXD031868 | Pride

The miR-23a~27a~24-2 microRNA cluster promotes inflammatory polarization of macrophages

Project description:The miR-23a~27a~24-2 microRNA cluster promotes inflammatory polarization of macrophages

| PRJNA670438 | ENA

MiRNA expression variation in primary NK cells treated with TGF-β1

Project description:Human NK cells activity against cancer cells is deeply suppressed by TGF-β1, an immunomodulatory cytokine that is released and activated in the tumor microenvironment. Moreover, our previous data showed that TGF-β1 modifies the chemokine receptor repertoire of NK cells. In particular, it decreases the expression of CX3CR1 that drives these effectors toward peripheral tissues, including tumor sites. In order to identify possible mechanisms mediating chemokine receptors modulation, we analyzed the miRNA profile of TGF-β1-treated primary NK cells. The analysis pointed out miR-27a-5p as a possible modulator of CX3CR1. We demonstrated the functional interaction of miR-27a-5p with the 3’ untranslated region (3’UTR) of CX3CR1 mRNA by two different experimental approaches: by the use of a luciferase assay based on a reporter construct containing the CX3CR1 3’UTR and by transfection of primary NK cells with a miR-27a-5p inhibitor. We also showed that the TGF-β1-mediated increase of miR-27a-5p expression is a consequence of miR-23a-27a-24-2 cluster induction. Moreover, we demonstrated that miR-27a-5p down-regulates the surface expression of CX3CR1. Finally we showed that Neuroblastoma cells induced in resting NK cells a downregulation of the CX3CR1 expression that was paralleled by a significant increase of miR-27a-5p expression. Therefore, the present study highlights miR-27a-5p as a pivotal TGF-β1-induced regulator of CX3CR1 expression.

2017-05-11 | GSE98769 | GEO

Expression data from miR-92 over-expressing R26MER/MER mouse embryonic fibroblast (MEFs)

Project description:miR-92 enhances c-Myc induced apoptosis. In the R26MER/MER mouse embryonic fibroblasts (MEFs), a switchable variant of Myc, MycERT2, was knocked into the genomic region downstream of the constitutive Rosa26 promoter, allowing acute activation of c-Myc by 4-OHT-induced nuclear translocation. This in vitro system nicely recapitulates c-Myc-induced apoptosis, as activated MycERT2 induces strong p53-dependent apoptosis in response to serum starvation. Enforced miR-92 expression in three independent R26MER/MER MEF lines significantly enhanced Myc-induced apoptosis. We used microarrays to investigate the molecular mechanism underlying miR-92 functions. Three independent R26MER/MER MEF lines were infected by MSCV vector alone or by MSCV vector encoding miR-92. These MEFs were serum starved and 4-OHT treated to trigger strong Myc-induced apoptosis.

2013-12-11 | E-GEOD-53225 | biostudies-arrayexpress

Combinatorial analysis of miRNA and mRNA expression in pancreatic ductal adenocarcinoma (PDAC)_mRNA

Project description:miRNAs are known to be involved in PDAC tumorigenesis, but only a few biologically relevant gene targets have been identified. Here we show that three miRNAs (miR-21, miR-23a and miR-27a) act in concert for the cooperative suppression of several tumor suppressor genes of which we experimentally validated PDCD4, BTG2 and NEDD4L. The synergistic inhibition of this triple miRNA combination is capable of reducing PDAC growth in a mouse model greater than inhibition of oncomiR-21 alone. Patients samples of normal pancreas (n=6) or pancreatic ductal adenocarcinoma (PDAC; n=6) were retrieved during surgery and placed in RNA Later stabilization fluid and then kept at minus 80 until required.

2013-12-30 | E-GEOD-41368 | biostudies-arrayexpress

MicroRNAs in an Experimental Model of Physiologic Left Ventricular Hypertrophy: a Microarray-based Analysis

Project description:BACKGROUND - MicroRNAs (miRs) are a class of small non-coding RNAs that regulate gene expression. Transgenic models have proved that a single miR can induce pathological cardiac hypertrophy and failure. The roles of miRs in the genesis of physiologic left ventricular hypertrophy (LVH), however, are not well elucidated. OBJECTIVE - To evaluate miRs expression in an experimental model of exercise-induced LVH. METHODS - Male Balb/c mice were divided into sedentary (SED) and exercise (EXE) groups. Voluntary exercise was performed in odometer-monitored metal wheels during 35 days. Analyses were performed after 7 and 35 days of training, and consisted of transthoracic echocardiography, maximal exercise test, miRs microarray (miRBase v.16) and real-time qRT-PCR analysis. RESULTS - Left ventricular weight/body weight ratio increased by 7% in the EXE group at day 7 (p<0.01) and by 11% at 35 days of training (p<0.001) After 7 days of training, microarray identified 35 deregulated miRs: 20 had an increase in their expression and 15 were down-regulated (p=0.01). At day 35 of training, 25 miRs were deregulated: 15 were up-regulated and 10 had decreased their expression compared to the SED group (p<0.01). qRT-PCR confirmed an increase in miR-150 levels at both time points and a decrease in miR-26b, miR-27a and miR-143 after 7 days of voluntary exercise. CONCLUSIONS M-bM-^@M-^S We unraveled new miRs that can modulate physiological cardiac hypertrophy, particularly miR-26b, -150, 27a and -143. Our data also indicate that previously established regulatory gene pathways involved in pathological LVH are not deregulated in physiologic LVH. Experimental model of left ventricular hypertrophy induced by voluntary exercise Male Balb/c mice, 8-10 weeks old, 4 groups analyzed, each group consisted of a pool from 4 animals

2014-06-01 | E-GEOD-52278 | biostudies-arrayexpress

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