Impact of miR-132 and miR-381 on endogenous forskolin responsive CREB targets in HEK293T cells
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE24812 | GEO | 2011/07/01
SECONDARY ACCESSION(S): PRJNA132309
REPOSITORIES: GEO
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Project description:Expression profiling of HEK293T cells transfected with miR-neg (negative control), miR-132 or miR-381 mimics and treated with forskolin for 0, 1 or 4hrs. HEK293T cells were reverse transfected with the respective miRNA mimics. 72hrs post-transfection, cells were treated with forskolin for 0, 1 or 4hrs. Total RNA was then extracted. Expression profiling was carried out with Affymetrix arrays. Experiment was performed in duplicate. Total of 18 samples.
2011-07-01 | E-GEOD-24812 | biostudies-arrayexpress
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Project description:Multidrug resistance-associated protein 4 (MRP4), a member of the C subfamily of ATP-binding cassette transporters, is highly expressed in the kidney of mammals and responsible for renal elimination of various drugs. Adenosine deaminase acting on RNA 1 (ADAR1) has been reported to regulate gene expression through catalyzing adenosine-to-inosine (A-to-I) RNA editing. In this study, we found that the down-regulation of ADAR1 increased the expression of MRP4 in human renal cells at post-transcriptional level. The results of luciferase reporter assays and microarray analysis revealed that down-regulation of ADAR1 decreased the levels of miR-381-3p, which led to the up-regulation of MPR4 expression. Circular RNAs (circRNAs) are a kind of closed loop endogenous non-coding RNAs that play a critical role of gene expression by acting as miRNA sponges. ADAR1 repressed the biogenesis of circular RNA circHIPK3 by catalyzing A-to-I RNA editing, which changed the secondary structure of precursor of circHIPK3. In silico analysis suggested that circHIPK3 acted as a sponge of miR-381-3p. Indeed, overexpression of circHIPK3 up-regulated the expression of MRP4 through interfering with miR-381-3p. Our results provide the novel point of view for regulating mechanism of the expression of xenobiotic transporters through mediating the control of circRNA expression by RNA editing enzyme ADAR1.
2022-07-27 | GSE192692 | GEO
Project description:Despite some success of pharmacotherapies targeting primarily neurohormonal dysregulation, heart failure is a growing global pandemic with increasing burden. Treatments that improve the disease by reversing heart failure at the cardiomyocyte level are lacking. MicroRNAs (miRNA) are transcriptional regulators of gene expression, acting through complex biological networks, and playing thereby essential roles in disease progression. Adverse structural remodelling of the left ventricle due to myocardial infarction (MI) is a common pathological feature leading to heart failure. We previously demonstrated increased cardiomyocyte expression of the miR-212/132 family during pathological cardiac conditions. Transgenic mice overexpressing the miR-212/132 cluster (miR-212/132-TG) develop pathological cardiac remodelling and die prematurely from progressive HF. Using both knockout and antisense strategies, we have shown miR-132 to be both necessary and sufficient to drive the pathological growth of cardiomyocytes in a murine model of left ventricular pressure overload. Based on the findings, we proposed that miR-132 may serve as a therapeutic target in heart failure therapy. Here we provide novel mechanistic insight and translational evidence for the therapeutic efficacy in small and large animal models (n=135) of heart failure. We demonstrate strong PK/PD relationship, dose-dependent efficacy and high clinical potential of a novel optimized synthetic locked nucleic acid phosphorothioate backbone antisense oligonucleotide inhibitor of miR-132 (antimiR-132) as a next-generation heart failure therapeutic.
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Project description:To identify putative novel specific targets of miR-199-5p, miR-199a-3p and miR-214-3p, we overexpressed these miRNAs in human MRC5 pulmonary fibroblasts (CCL-171) using synthetic pre-miRNAs or a synthetic “negative” pre-miRNA control (miR-Neg). RNA samples were harvested 48 hours post-transfection and 3 independent experiments were carried out.
2019-04-11 | GSE97824 | GEO
Project description:PC12 cells (passage 22) were cultured at 5% CO2 in a 37 C incubator. The growth medium was DMEM (high glucose, Invitrogen) supplemented with 25mM HEPES, 10% FCS, 5% FBS and 1x Pen/Strep (Invitrogen). 1x10^6 cells were starved overnight in DMEM +25 mM HEPES and treated with 10 uM 1,9 dideoxy forskolin or forskolin for 60 min. The final DMSO concentration was 0.05%. Total RNA was purified using Trizol (Invitrogen) according to the manufacturer's protocol. An additional round of purification was conducted using Rneasy columns (Qiagen) according to the manufacturer's protocol. cRNA was synthesized and labeled according to standard Affymetrix protocols. 2 biological replicates for the forskolin and 1,9 dideoxy forskolin conditions were run on Affymetrix RAE230 A and B chips for a total of 8 hybridizations.
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Project description:Specificity of interaction between a microRNA (miRNA) and its targets crucially depends on the seed region located in its 5’-end. It is often implicitly considered that two miRNAs sharing the same biological activity should display similarity beyond the strict six nucleotide region that forms the seed, in order to form specific complexes with the same mRNA targets. We have found that expression of hsa-miR-147b and hsa-miR-210, though triggered by different stimuli (i.e. lipopolysaccharides and hypoxia, respectively), induce very similar cellular effects in term of proliferation, migration and apoptosis. Hsa-miR-147b only shares a “minimal” 6-nucleotides seed sequence with hsa-miR-210, but is identical with hsa-miR-147a over 20 nucleotides, except for one base located in the seed region. Phenotypic changes induced after heterologous expression of miR-147a strikingly differ from those induced by miR-147b or miR-210. In particular, miR-147a behaves as a potent inhibitor of cell proliferation and migration. These data fit well with the gene expression profiles observed for miR-147b and miR-210, which are very similar, and the gene expression profile of miR-147a, which is distinct from the two others. Bioinformatics analysis of all human miRNA sequences indicates multiple cases of miRNAs from distinct families exhibiting the same kind of similarity that would need to be further characterized in terms of putative functional redundancy. Besides, it implies that functional impact of some miRNAs can be masked by robust expression of miRNAs belonging to distinct families. To compare the set of transcripts targeted by hsa-miR-147a, hsa-miR-147b and hsa-miR-210, we overexpressed these miRNAs in human lung adenocarcinoma A549 cells by transfecting them with synthetic pre-miRNAs or a synthetic “negative” pre-miRNA as a control (miR-Neg). RNA samples were harvested at 48 hours post-transfection and 3 independent experiments were carried out. 48 hours post-transfection, 3 independent experiments were performed in dye-swap: hsa-miR-147a versus miR-Neg; hsa-miR-147b versus miR-Neg; hsa-miR-210 versus miR-Neg.
2012-08-20 | E-GEOD-33247 | biostudies-arrayexpress
Project description:To identify putative novel specific targets of miR-143-3p and miR-145-5p, we overexpressed these miRNAs in BRAFV600E mutant human M238P melanoma cells using synthetic mimics or a synthetic “negative” control mimic (miR-Neg). RNA samples were harvested 48 hours post-transfection and 2 independent experiments were carried out.
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Project description:To identify putative novel specific targets of mir-199-5p, we overexpressed miR-199a-5p as well as miR-21 and a siRNA targeted against CAV1 in human HFL1 pulmonary fibroblasts (CCL-153) by transfecting them with synthetic pre-miRNAs or a synthetic “negative” pre-miRNA as control (miR-Neg). RNA samples were harvested at 48 hours post-transfection and 2 independent experiments were carried out. Additional samples correspond to HFL1 cells treated or not with 10ng/ml TGFbeta for 48 hours in the absence of serum (2 independent experiments). 2 independent experiments performed in a one color design, corresponding to 7 conditions (miR-Neg, miR-199-5p, miR-21, si-Neg, si-CAV1, control, TGFbeta) and a total of 14 samples.
2013-02-01 | E-GEOD-34815 | biostudies-arrayexpress