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Identification and characterization of retinoic acid-responsive genes in mouse kidney development

ABSTRACT: Retinoic acid (RA) signaling regulates a variety of developmental processes through controlling the expression of numerous genes. Here, we have identified and characterized RA-responsive genes in mouse kidney development. Analysis of isolated embryonic kidneys cultured in the presence and absence of RA identified 33 candidates of RA-responsive genes. Most of these candidate genes were down-regulated by treatment with the RA receptor antagonist. Many of them have potential binding sites for Elf5, one of the RA-responsive genes, in their promoter region. Whole-mount in situ hybridization demonstrated that specific expression of Elf5 in the ureteric trunk depends on RA. RA-dependent expression in the ureteric trunk was also demonstrated for the sodium channel subunit Scnn1b, which has been shown to be the marker gene of the collecting duct. In contrast, the expression of Ecm1, Tnfsf13b and IL-33 was detected in the stromal mesenchymal cells. Both Tnfsf13b and IL-33 were previously shown to cause NF-κB activation. We have demonstrated that the inhibition of NF-κB signaling with specific inhibitors suppresses branching morphogenesis of the ureteric bud. Our study thus identifies and characterizes RA-dependent upregulated genes in kidney development, and suggests an involvement of NF-κB signaling in the branching morphogenesis.

ORGANISM(S): Mus musculus

PROVIDER: GSE57656 | GEO | 2014/11/14

SECONDARY ACCESSION(S): PRJNA247461

REPOSITORIES: GEO

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Identification and characterization of retinoic acid-responsive genes in mouse kidney development

Project description:Retinoic acid (RA) signaling regulates a variety of developmental processes through controlling the expression of numerous genes. Here, we have identified and characterized RA-responsive genes in mouse kidney development. Analysis of isolated embryonic kidneys cultured in the presence and absence of RA identified 33 candidates of RA-responsive genes. Most of these candidate genes were down-regulated by treatment with the RA receptor antagonist. Many of them have potential binding sites for Elf5, one of the RA-responsive genes, in their promoter region. Whole-mount in situ hybridization demonstrated that specific expression of Elf5 in the ureteric trunk depends on RA. RA-dependent expression in the ureteric trunk was also demonstrated for the sodium channel subunit Scnn1b, which has been shown to be the marker gene of the collecting duct. In contrast, the expression of Ecm1, Tnfsf13b and IL-33 was detected in the stromal mesenchymal cells. Both Tnfsf13b and IL-33 were previously shown to cause NF-?B activation. We have demonstrated that the inhibition of NF-?B signaling with specific inhibitors suppresses branching morphogenesis of the ureteric bud. Our study thus identifies and characterizes RA-dependent upregulated genes in kidney development, and suggests an involvement of NF-?B signaling in the branching morphogenesis. To obtain genome-wide gene expression profiles of kidneys cultured in 10% FBS DMEM, serum-free DMEM, and serum-free DMEM with RA, we performed microarray analysis on RNA prepared from these three samples. Total RNA was prepared using the RNeasy Mini Kit (QIAGEN) according to the manufacturer's instruction. Synthesis of cDNA, in vitro transcription and biotin labeling cRNA, and hybridization to GeneChip Mouse Gene 1.0 ST array (Affymetrix) were performed according to Affymetrix protocols.

2014-11-14 | E-GEOD-57656 | biostudies-arrayexpress

TLR4/NF-κB-responsive microRNAs in a mouse model of skeletal muscle ischemia-reperfusion injury

Project description:TLR4/NF-κB signaling plays a central mediator in response to danger signals released in the muscle ischemia-reperfusion injury (IRI). This study was designed to profile TLR4/NF-κB-responsive microRNAs (miRNAs) in the skeletal muscles following IRI. Following 2 h of ischemia and subsequent reperfusion for indicated times (0 h, 4 h, 1 d, and 7 d) of the isolated thigh skeletal muscles based on femoral artery perfusion of C57BL/6, Tlr4–/–, and NF-κB–/–mice, the muscle specimens were analyzed with an miRNA array to detect the TLR4/NF-κB-responsive miRNAs.

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Comparison of E14.5 embryonic kidney transcriptomes (Grb2 ureteric-specific knockout vs wild-type)

Project description:Grb2 is a small SH2-SH3 adaptor molecule that interacts with activated tyrosine kinase receptors (RTKs), providing a crucial link towards downstream activation of pro-proliferative and pro-survival ERK and Akt signaling pathways. Ret and FGFR2, two RTKs that interact with Grb2, play important roles in ureteric branching and the proper establishment of the renal collecting duct system, but it is unclear whether Grb2 is required in this process. In this study, we selectively ablated a conditional floxed allele of the Grb2 gene within the ureteric epithelial lineage in mice and demonstrate that Grb2 signaling is essentially required for proper collecting duct development. Ureteric Grb2 deficiency results in perinatal lethality and severe renal hypodysplasia closely reminiscent of the rudimentary kidney phenotypes observed in Ret-null mutant mice. Grb2 loss attenuates ERK and Akt activation in the ureteric epithelia resulting in pronounced impairment of ureteric branching. Gene expression analysis reveals that Grb2 deficiency results in defective induction of genes implicated in both ureteric branching and reciprocal mesenchymal metanephric induction. Our findings therefore strongly indicate that Grb2 is a physiologically-relevant major RTK signaling relay partner that promotes renal branching morphogenesis and the proper development of the collecting duct system and the urogenital tract. Microarray was used to profile and compare the transcriptomes of developing kidneys of E14.5 Grb2 conditional knockout (ureteric-bud specific) and wild-type embryos

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Measuring signaling and RNA-Seq in the same cell links gene expression to dynamic patterns of NF-κB activation

Project description:We measure translocation dynamics of NF-κB and perform single-cell RNA-sequencing in the same individual cell. We use this data to identify genes that are responsive to the dynamics of NF-κB activation

2017-02-15 | GSE94383 | GEO

Generation of kidney ureteric bud and collecting duct organoid

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Transcriptional outcomes and kinetic patterning of gene expression in response to NF-κB activation [RNA-seq]

Project description:Transcription factor NF-κB regulates cellular responses to environmental cues. For many stimuli NF-κB resides only transiently in the nucleus. Consequently, time-dependent transcriptional outputs are a fundamental feature of NF-κB activation. Here we identify mechanisms that direct kinetic patterns of NF-κB-dependent gene expression and transcriptional outcomes in response to a transient NF-κB-inducing stimulus in B cells. By combining RELA binding, RNA polymerase II (Pol II) recruitment, and perturbation of NF-κB activation, we demonstrate that kinetic differences amongst early- and late-activated RELA target genes can be understood based on chromatin configuration prior to cell activation and RELA-dependent priming, respectively. Additionally, we identified genes that were repressed by RELA activation and others that responded to RELA-activated transcription factors. Cumulatively, our studies define an NF-κB-responsive inducible gene cascade in activated B cells.

2018-09-17 | GSE117254 | GEO

Transcriptional outcomes and kinetic patterning of gene expression in response to NF-κB activation [ChIP-seq]

2018-09-17 | GSE117250 | GEO

Transcriptional outcomes and kinetic patterning of gene expression in response to NF-κB activation [ChIA-PET]

2018-09-17 | GSE117241 | GEO

HNF1B controls epithelial organization and cell polarity during ureteric bud branching and collecting duct morphogenesis

Project description:Kidney development depends critically on proper ureteric bud branching giving rise to the entire collecting duct system. The transcription factor HNF1B is required for the early steps of ureteric bud branching. Yet, the molecular and cellular events regulated by HNF1B are poorly understood. We report that specific removal of Hnf1b from the ureteric bud leads to defective cell-cell contacts and apico-basal polarity during the early branching events. High resolution ex vivo imaging combined with a membranous fluorescent reporter strategy show decreased mutant cell-rearrangements during mitosis-associated cell dispersal and severe epithelial disorganisation. Molecular analysis reveals downregulation of Gdnf-Ret pathway components and suggests that HNF1B acts both upstream and downstream of Ret-signaling by directly regulating Gfrα1 and Etv5. Subsequently, Hnf1b-deletion leads to massively mispatterned ureteric tree network, defective collecting duct differentiation and disrupted tissue architecture leading to cystogenesis. Consistently, mRNA-seq analysis performed from E15.5 control and mutant kidneys shows that the most impacted genes encode intrinsic cell-membrane components with transporter activity. Our study uncovers a fundamental and recurrring role of HNF1B in epithelial organization during early ureteric bud branching and further patterning and differentiation of the collecting duct system. Article submitted to Development. Authors: Audrey Desgrange, Claire Heliot,Ilya Skovorodkin, Saad U. Akram, Janne Heikkilä, Veli-Pekka Ronkainen, Ilkka Miinalainen I., Seppo J. Vainio and Silvia Cereghini

2017-12-15 | GSE106085 | GEO

RelA and RelB-dependent transcriptome analysis in lymphotoxin-ß receptor stimulated mouse embryonic fibroblasts

Project description:Background: Lymphotoxin signaling via the lymphotoxin-β receptor (LTβR) has been implicated in several biological processes, ranging from development of secondary lymphoid organs, maintenance of splenic tissue, host defense against pathogens, autoimmunity, and lipid homeostasis. The major transcription factor that is activated by LTβR crosslinking is NF-κB. Two signaling pathways have been described that result in the activation of classical p50-RelA and alternative p52-RelB NF-κB heterodimers. Results: Using microarray analysis, we investigated the transcriptional response downstream of the LTβR in mouse embryoni fibroblasts (MEF) and its regulation by the RelA and RelB subunits of NF-κB. We describe novel LTβR-responsive genes that are regulated by RelA and/or RelB. Interestingly, we found that the majority of LTβR-regulated genes require the presence of both RelA and RelB, suggesting significant crosstalk between the two NF-κB activation pathways. Gene Ontology (GO) analysis confirmed that LTβR-NF-κB target genes are predominantly involved in the regulation of immune responses. However, other biological processes, such as apoptosis/cell death, cell cycle, angiogenesis, and taxis were also regulated by LTβR signaling. Moreover, we show that activation of the LTβR inhibits the expression of a key adipogenic transcription factor, peroxisome proliferator activated receptor-γ (pparg), suggesting that LTβR signaling may interfere with adipogenic differentiation. Conclusions: Thus, microarray analysis of LTβR-stimulated fibroblasts revealed further insight into the transcriptional response of LTβR signaling and its regulation by the NF-κB family members RelA and RelB. Keywords: cell type comparison (wt vs relA-/- vs relB-/-) after genetic modification using a time course for each cell type (wt, relA-/-, relB-/-) two time points were analysed (0h as control and 10h) using 3 technical replicates resulting in 18 samples in total

2008-12-17 | E-GEOD-11963 | biostudies-arrayexpress

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