Expression data from primary hepatocytes isolated from miR-143DOX mice
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE26460 | GEO | 2011/04/08
SECONDARY ACCESSION(S): PRJNA136569
REPOSITORIES: GEO
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Project description:The contribution of altered posttranscriptional gene silencing (PTGS) to the development of insulin resistance and type 2 diabetes mellitus so far remains elusive. We have described that expression of microRNAs (miR)-143 and -145 is dysregulated in genetic and dietary mouse models of obesity. Induced transgenic overexpression of miR-143, but not miR-145, causes insulin resistance and impaired insulin-stimulated AKT activation. We used microarrays to analyze the underlying molecular mechanisms of miR-143-mediated development of insulin resistance. miR-143DOX mice (n=3) and wildtype littermate controls (n=3) were treated with doxycycline via the drinking water to induce miR-143 overexpression in the transgenic animals. Primary hepatocytes were isolated for RNA extraction and hybridization on Affymetrix microarrays.
2011-04-08 | E-GEOD-26460 | biostudies-arrayexpress
Project description:Insulin resistance represents a hallmark during the development of type 2 diabetes mellitus (T2D) and in the pathogenesis of obesity-associated disturbances of glucose and lipid metabolism 1,2,3. MicroRNA (miR)-dependent posttranscriptional gene silencing has recently been recognized to control gene expression in disease development and progression including that of insulin-resistant T2D. MiRs, whose deregulation alters hepatic insulin sensitivity include miR-143, miR-181 and miR-103/107. Here we report that expression of miR-802 is increased in liver of two obese mouse models and of obese human subjects. Inducible transgenic overexpression of miR-802 in mice causes impaired glucose tolerance and attenuates insulin sensitivity, while reduction of miR-802 expression improves glucose tolerance and insulin action. We identify Hnf1b as a target of miR-802-dependent silencing and shRNA-mediated reduction of Hnf1b in liver causes glucose intolerance, impairs insulin signaling and promotes hepatic gluconeogenesis. In turn, hepatic overexpression of Hnf1b improves insulin sensitivity in db/db mice. Thus, the present study defines a critical role for deregulated expression of miR-802 in the development of obesity-associated impairment of glucose metabolism via targeting Hnf1b and assigns Hnf1b an unexpected role in the control of hepatic insulin sensitivity.
2012-11-10 | GSE42188 | GEO
Project description:A growing body of literature has proposed cell-autonomous tumor suppressor functions for the mir-143~145 cluster in a variety of human cancers, including lung adenocarcinoma, and has reported therapeutic benefits of delivering mir-143 and mir- 145 to tumors. In contrast to these studies, we found that depletion or forced expression of mir-143 and mir-145 in an autochthonous mouse model of lung adenocarcinoma did not affect tumor development. Surprisingly, we observed that loss of mir-143~145 from the tumor microenvironment significantly reduced tumor burden, indicating a non-cell- autonomous role for these miRNAs in promoting tumorigenesis. By examining the expression patterns of different cell populations isolated in vivo from tumor-bearing lungs using an integrated computational approach, we identified a role for mir-145 in stimulating the proliferation of endothelial cells by downregulating an inhibitory kinase, Camk1d, which prevents mitotic entry. As a consequence, tumors in mir-143~145- deficient animals exhibited diminished hallmarks of neo-angiogenesis, increased apoptosis and their expansion appeared limited by the tumor’s ability to co-opt the alveolar vasculature. These findings show that expression of the mir-143~145 cluster in the tumor stroma promotes rather than suppresses tumorigenesis and cautions against the use of these miRNAs as agents in cancer therapeutics.
2016-05-21 | GSE71877 | GEO
Project description:Insulin resistance represents a hallmark during the development of type 2 diabetes mellitus (T2D) and in the pathogenesis of obesity-associated disturbances of glucose and lipid metabolism 1,2,3. MicroRNA (miR)-dependent posttranscriptional gene silencing has recently been recognized to control gene expression in disease development and progression including that of insulin-resistant T2D. MiRs, whose deregulation alters hepatic insulin sensitivity include miR-143, miR-181 and miR-103/107. Here we report that expression of miR-802 is increased in liver of two obese mouse models and of obese human subjects. Inducible transgenic overexpression of miR-802 in mice causes impaired glucose tolerance and attenuates insulin sensitivity, while reduction of miR-802 expression improves glucose tolerance and insulin action. We identify Tcf2 as a target of miR-802-dependent silencing and shRNA-mediated reduction of Tcf2 in liver causes glucose intolerance, impairs insulin signaling and promotes hepatic gluconeogenesis. In turn, hepatic overexpression of Tcf2 improves insulin sensitivity in db/db mice. Thus, the present study defines a critical role for deregulated expression of miR-802 in the development of obesity-associated impairment of glucose metabolism via targeting Tcf2 and assigns Tcf2 an unexpected role in the control of hepatic insulin sensitivity. Adenoviruses (Ad5) encoding either GFP (Ad-Ctrl 1-3) or shTcf2 (Ad-shTcf2 1-4) were injected into the tail vein of C57BL/6 mice at 1x10E10 viral particles (VP) per gram bodyweight. Biotin-labeled cDNA was synthesized using GeneChip Whole Transcript Sense Labeling Assay (Affymetrix) according to vendorM-bM-^@M-^Ys instructions. After fragmentation, cDNAs were hybridized for 17h at 45M-BM-0C on Affymetrix Mouse Gene 1.0 ST Arrays. The Arrays were washed and stained in the GeneChip Fluidics Station 450 and scanned on a GeneChip Scanner 3000 7G (Affymetrix). Data intensities were log transformed and normalized with a quantile normalization method using Affymetrix Power Tools. Differentially expressed genes were identified according to statistical evidence indicated by Student's t-test and fold change statistics
2012-11-10 | E-GEOD-42188 | biostudies-arrayexpress
Project description:In a series of mouse genetic studies, we concluded that miR-143/145 expression in intestinal subepithelial myofibroblasts (ISEMFs) promotes epithelial regeneration after DSS-mediated injury in the colon. This experiment aims to identify miR-143/145 target genes that are involved in this function. We generated primary ISEMFs from wildtype and miR-143/145 null mouse colons and analyzed their gene expression profile. We further subjected ISEMFs to LPS treatment, in order to measure gene expression changes that are only revealed after inflammatory stress.
2014-05-22 | GSE55651 | GEO
Project description:mRNA profiling of mouse ureters comparing wild-type ureter vs. ureters from mice having whole body deletion of miR-143 and miR-145 which results in abnormal ureter peristalsis and hydronephrosis We used microarrays to detail the global program of gene expression in wild-type and miR-143/145-deficient ureters which revealed dysregulation of genes linked to smooth muscle morphology and function. Two condition experiment: wild type vs miR-143/145 KO; biological replicates: individual mice - 2 wild type, 2 mutant. One replicate per array.
2014-10-08 | E-GEOD-58274 | biostudies-arrayexpress
Project description:In a series of mouse genetic studies, we concluded that miR-143/145 expression in intestinal subepithelial myofibroblasts (ISEMFs) promotes epithelial regeneration after DSS-mediated injury in the colon. This experiment aims to identify miR-143/145 target genes that are involved in this function. We generated primary ISEMFs from wildtype and miR-143/145 null mouse colons and analyzed their gene expression profile. We further subjected ISEMFs to LPS treatment, in order to measure gene expression changes that are only revealed after inflammatory stress. Three wild-type and three miR-143/145 null ISEMF cell lines were isolated from mouse colons. Cells were treated with or without 1 ug/mL LPS for 24 hours and total RNA was isolated. Gene expression was profiled using Illumina microarrays.
2014-05-22 | E-GEOD-55651 | biostudies-arrayexpress
Project description:mRNA profiling of mouse ureters comparing wild-type ureter vs. ureters from mice having whole body deletion of miR-143 and miR-145 which results in abnormal ureter peristalsis and hydronephrosis We used microarrays to detail the global program of gene expression in wild-type and miR-143/145-deficient ureters which revealed dysregulation of genes linked to smooth muscle morphology and function.
2014-10-08 | GSE58274 | GEO
Project description:Lineage dedifferentiation towards a mesenchymal-like state displaying myofibroblast and fibrotic features is a common mechanism of adaptive and resistance to targeted therapy in melanoma. Here we show that the anti-fibrotic drug Nintedanib is active to normalize the fibrous ECM network, enhance the efficacy of MAPK-targeted therapy and delay tumor relapse in a pre-clinical model of melanoma. Acquisition of this resistant phenotype and its reversion by Nintedanib pointed to miR-143/-145 pro-fibrotic cluster as a driver of this mesenchymal-like phenotype. Upregulation of the miR-143/-145 cluster under BRAFi/MAPKi therapy was observed in melanoma cells in vitro and in vivo and was associated with an invasive/undifferentiated profile. The 2 mature miRNAs generated from this cluster, miR-143-3p and miR-145-5p collaborated to mediate transition towards a drug resistant undifferentiated mesenchymal-like state by targeting Fascin actin-bundling protein 1 (FSCN1), modulating the dynamic crosstalk between the actin cytoskeleton and the ECM through the regulation of focal adhesion dynamics and mechanotransduction pathways. Our study brings insights into a novel miRNA-mediated regulatory network that contributes to non-genetic adaptive drug resistance and provides proof-of-principle that preventing MAPKi-induced pro-fibrotic stromal response is a viable therapeutic opportunity for patients on targeted therapy.
2021-12-29 | GSE171883 | GEO
Project description:The aim of this study was to detect and functionally investigate miRNAs linked to insulin sensitivity in human subcutaneous white adipose tissue (scWAT). Subjects were selected based on the insulin-stimulated lipogenesis response of subcutaneous adipocytes. Eleven miRNAs displayed differential expression between OIR and OIS states. Overexpression of miR-143-3p and miR-652-3p increased insulin-stimulated lipogenesis in human in vitro-differentiated adipocytes. MicroRNAs-143-3p and -652-3p are linked to scWAT insulin resistance independently of obesity.
2017-05-01 | GSE87379 | GEO