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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Molecular signature of mineralocorticoid signalling in cardiomyocytes

ABSTRACT: Gene expression analysis of hearts from double transgenic mice with conditional, cardiomyocyte-specific, overexpression of the mineralocorticoid (MR) or of the glucocorticoid receptor (GR). GR-mice vs controls, MR-mice vs controls. GR: 3 sample pools hybridized to 2 microarrays each. MR: 1 sample pool hybridized to 3 microarrays. Microarray contains triplicate spots.

ORGANISM(S): Mus musculus

SUBMITTER: Marja Steenman

PROVIDER: E-GEOD-20525 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Molecular signature of mineralocorticoid receptor signaling in cardiomyocytes: from cultured cells to mouse heart.

Latouche Celine C Sainte-Marie Yannis Y Steenman Marja M Castro Chaves Paulo P Naray-Fejes-Toth Aniko A Fejes-Toth Geza G Farman Nicolette N Jaisser Frederic F

Endocrinology 20100630 9

Excess mineralocorticoid signaling is deleterious for cardiovascular functions, as demonstrated by the beneficial effects of mineralocorticoid receptor (MR) antagonism on morbidity and mortality in patients with heart failure. However, the understanding of signaling pathways after MR activation in the heart remains limited. We performed transcriptomic analyses in the heart of double-transgenic mice with conditional, cardiomyocyte-specific, overexpression of the MR (MRcardio mice) or the glucocor ...[more]

PMID: 20591974

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Molecular signature of mineralocorticoid signalling in cardiomyocytes

Project description:Gene expression analysis of hearts from double transgenic mice with conditional, cardiomyocyte-specific, overexpression of the mineralocorticoid (MR) or of the glucocorticoid receptor (GR).

2010-06-18 | GSE20525 | GEO

ChIP-nexus of mineralocorticoid receptors and glucocorticoid receptors in neuroblastoma cells

Project description:Purpose: To compare the binding profiles of mineralocorticoid and glucocorticoid receptors after corticosterone treatment in neuroblastoma cells. Methods: Tagged glucocorticoid receptors (eGFP-rat GR) and mineralocorticoid receptors (mCherry-rat MR) were transiently transfected into Neuro2A mouse neuroblastoma cells and treated with (i) vehicle, (ii) corticosterone 100 nM for 20 mins and (iii) corticosterone 100 nM for 20 mins followed by media repacement twice and 40 mins further incubation in charcoal-stripped serum media. ChIP-nexus samples were prepared in triplicate for deep sequencing using Illumina NextSeq, as well as control samples taken from cell lysates before immunoprecipitation. Sequence data was analyzed and processed for the identification of enriched binding sites, using MACS2, and for the characteristic staggered ChIP-nexus borders, using the MACE pipeline (Wang et al., 2014). Results: Corticosterone-sensitive glucocorticoid receptor (GR) binding sites and mineralocorticoid receptor (MR) binding sites showed considerable overlap, by MACS2 analysis. GR and MR binding sites were highly similar showing recruitment to the same DNA sites, by MACE analysis (Wang et al., 2014). Further analyses showed GR could tether MR to the DNA by GR in a functional manner such that gene expression could be altered by the presence of tethered MR. Conclusions: MR can be recruited to DNA-binding sites by GR, even in the absence of MR DNA-binding. MR can interact in multiple modes at genomic DNA binding sites.

2019-03-15 | GSE115417 | GEO

Glucocorticoid and Mineralocorticoid Receptor Signaling have Sex-dependent and Independent Effects in Mouse Hippocampus

Project description:Many stress-related neuropsychiatric disorders display pronounced sex differences in their frequency and clinical symptoms. Glucocorticoids are primary stress hormones that have been implicated in the development of these disorders but whether they contribute to the observed sex bias is poorly understood. Glucocorticoids signal through two closely related nuclear receptors, the glucocorticoid (GR) and mineralocorticoid receptor (MR), that are both expressed at high levels in the hippocampus. To investigate the sex-dependent and independent actions of glucocorticoids in the hippocampus, we developed knockout mice lacking hippocampal GR (GREmx1-cre), MR (MREmx1-cre), or both GR and MR (GRMREmx1-cre). Genome-wide microarrays were performed on RNA isolated from the hippocampus of male and female flox control and knockout mice in order to 1) identify genes dysregulated in a sex-dependent and independent manner by a deficiency in GR, MR, or both GR and MR signaling and 2) identify the genes responsible for the sex-dependent and independent phenotypes observed in these mice.

2023-12-05 | GSE240873 | GEO

Crosstalk between the glucocorticoid and mineralocorticoid receptor boosts glucocorticoid-induced killing of multiple myeloma cells

Project description:The glucocorticoid receptor (GR) is a crucial drug target in multiple myeloma as its activation with glucocorticoids effectively triggers myeloma cell death. However, as high-dose glucocorticoids are also associated with deleterious side effects, novel approaches are urgently needed to improve GR’s action in myeloma. Here we reveal a functional crosstalk between GR and the mineralocorticoid receptor (MR) that culminates in improved myeloma cell killing. We show that the GR agonist Dexamethasone (Dex) downregulates MR levels in a GR-dependent way in myeloma cells. Co-treatment of Dex with the MR antagonist Spironolactone (Spi) enhances Dex-induced cell killing in primary, newly diagnosed GC-sensitive myeloma cells, while in a relapsed GC-resistant setting, Spi alone induces distinct myeloma cell killing. On a mechanistic level, we find that a GR-MR crosstalk is arising from an endogenous interaction between GR and MR in myeloma cells. Quantitative dimerization assays show that Spi reduces Dex-induced GR-MR heterodimerization and completely abolishes Dex-induced MR MR homodimerization but leaves GR-GR homodimerization intact. Unbiased transcriptomics further reveals that c-myc and many of its target genes are downregulated most by Dex and Spi combined, while proteomics analyses identify that several metabolic hallmarks are modulated most by this combination treatment. Finally, we identified a subset of Dex+Spi downregulated genes and proteins that may predict prognosis in the CoMMpass patient cohort. Our study demonstrates that GR-MR crosstalk is therapeutically relevant in myeloma as it provides novel strategies towards glucocorticoid-based dose-reduction.

2023-10-24 | PXD043635 | Pride

Exploiting crosstalk between glucocorticoid and mineralocorticoid receptors enhances glucocorticoid-induced killing of multiple myeloma cells

Project description:Long-term glucocorticoid treatment in multiple myeloma is hampered by deleterious side effects. Glucocorticoids bind to the glucocorticoid receptor (GR), which is a crucial drug target because its activation triggers myeloma cell death. The mineralocorticoid receptor (MR) is a closely related nuclear receptor but its impact on glucocorticoid responsiveness in myeloma is unknown. Here we reveal a functional crosstalk between GR and MR that culminates in improved myeloma cell killing. We show that the GR agonist Dexamethasone (Dex) downregulates MR levels in a GR-dependent way in myeloma cells. Co-treatment of Dex with the MR antagonist Spironolactone enhances Dex-induced cell killing in (primary) myeloma cells. The crosstalk is further evidenced by an endogenous interaction between GR and MR in myeloma cells that is ligand-inducible and by a distinctive gene expression profile. Our study demonstrates that GR-MR crosstalk is therapeutically relevant in myeloma and presents a glucocorticoid-based dose-reduction strategy that could diminish glucocorticoid-related side effects in patients.

2023-08-23 | GSE200313 | GEO

Mineralocorticoid receptor (MR) trans-activation of inflammatory AP-1 signaling: dependence on DNA sequence, MR conformation, and AP-1 family member expression

Project description:Mineralocorticoid receptor (MR) primarily promote cardiovascular inflammation by incompletely understood mechanisms. The differential effects of GR and MR on inflammatory signaling and their contextual dependencies are relevant to the design of next generation drugs with improved safety and efficacy While MR has been shown to weakly repress NFκB, its role in modulating AP-1 has not been established

2016-09-20 | GSE80276 | GEO

Smooth muscle cell mineralocorticoid receptor regulation of vascular microRNAs with aging

Project description:We used a smooth muscle cell-specific mineralocorticoid receptor knockout mouse to generate young and aged MR-intact and SMC-MR-KO aortic miRNA to examine the effect of age on vascular miRNA alterations in the presence and absence of SMC-MR. For more information about the mouse model see: McCurley, A et al. Direct regulation of blood pressure by smooth muscle cell mineralocorticoid receptors. Nat Med. 2012 Sep;18(9):1429-33 Total miRNA was extracted from young (3-4 mo) and aged male (12mo) MR-intact and SMC-MR-KO mice to investigate aging-induced alterations in vascular miRNA expression

2016-07-29 | E-GEOD-84960 | biostudies-arrayexpress

Gene Changes in Hippocampus from Mice with Conditional Knockout of Hippocampal GR, MR, or both GR and MR

Project description:Glucocorticoids are primary stress hormones that have been implicated in the pathogenesis of cognitive impairments and psychiatric illnesses. The hippocampus expresses high levels of glucocorticoid (GR) and mineralocorticoid receptors (MR) which both bind glucocorticoids. However, the specific and cooperative roles played by GR and MR in mediating the direct actions of stress on the hippocampus are unknown. To elucidate the function of hippocampal GR and MR, we generated mice with conditional knockout of GR (GREmx1-cre), MR (MREmx1-cre), or both GR and MR (GRMREmx1-cre) in the hippocampus. Genome-wide microarrays were performed on RNA isolated from the whole hippocampus to 1) identify genes subject to regulation by GR alone, MR alone, or both GR and MR and 2) identify the genes responsible for the morphological and behavioral phenotypes observed in these mice.

2021-08-04 | GSE149625 | GEO

Cistrome of the Aldosterone-activated Mineralocorticoid Receptor in Human Renal Cells

Project description:Aldosterone, the main mineralocorticoid hormone in Humans, has a major role in maintaining the hemo-electrolytique homeostasis, by acting in the distal part of nephron. This steroid hormone mainly acts through its binding to a ligand-induced transcription factor, the mineralocorticoid receptor (MR). MR binds to specific genomic sequences, where it recruits transcriptional coregulators, to activate or repress target gene transcription. The aim of this work was to access the whole aldosterone-dependand MR target genes, by comparing sequenced data from aldosterone or vehicle-treated samples. Anti-MR ChIP-seq in Human Kidney GFP-hMR cells treated with vehicle or Aldosterone.

2015-06-12 | E-GEOD-69777 | biostudies-arrayexpress

Smooth muscle cell mineralocorticoid receptor regulation of vascular microRNAs with aging

2016-07-29 | GSE84960 | GEO

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