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Epigenetic regulation of NfatC1 transcription and osteoclastogenesis by nicotinamide phosphoribosyl transferase in the pathogenesis of arthritis

ABSTRACT: Epigenetic regulation of NfatC1 transcription and osteoclastogenesis by nicotinamide phosphoribosyl transferase in the pathogenesis of arthritis

PROVIDER: PRJNA498482 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8110320_1.fastq.gz	Fastqsanger.gz
	SRR8110320_2.fastq.gz	Fastqsanger.gz
	SRR8110321_1.fastq.gz	Fastqsanger.gz
	SRR8110321_2.fastq.gz	Fastqsanger.gz
	SRR8110314_1.fastq.gz	Fastqsanger.gz

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Epigenetic regulation of NfatC1 transcription and osteoclastogenesis by nicotinamide phosphoribosyl transferase in the pathogenesis of arthritis

Project description:Nicotinamide phosphoribosyltransferase (NAMPT) functions in NAD synthesis, apoptosis, and inflammation. Dysregulation of NAMPT has been associated with several inflammatory diseases, including rheumatoid arthritis (RA). The purpose of this study was to investigate NAMPT’s role in arthritis using mouse and cellular models. Collagen-induced arthritis (CIA) in DBA/1J Nampt+/- mice was evaluated by ELISA, micro-CT and RNA-sequencing (RNA-seq). In vitro Nampt loss-of-function and gain-of-function studies on osteoclastogenesis were examined by TRAP staining, nascent RNA capture, luciferase reporter assays, and ChIP-PCR. Nampt-deficient mice presented with suppressed inflammatory bone destruction and disease progression in a CIA mouse model. Nampt expression was required for the epigenetic regulation of the Nfatc1 promoter and osteoclastogenesis. Finally, RNA-seq identified 690 differentially expressed genes in whole ankle joints which associated (P<0.05) with Nampt expression and CIA. Selected target was validated by RT-PCR or functional characterization. We have provided evidence that NAMPT functions as a genetic risk factor and a potential therapeutic target to RA.

2019-01-31 | GSE121793 | GEO

Epigenetic regulation of NfatC1 transcription and osteoclastogenesis by nicotinamide phosphoribosyl transferase in the pathogenesis of arthritis.

Project description:Nicotinamide phosphoribosyltransferase (NAMPT) functions in NAD synthesis, apoptosis, and inflammation. Dysregulation of NAMPT has been associated with several inflammatory diseases, including rheumatoid arthritis (RA). The purpose of this study was to investigate NAMPT's role in arthritis using mouse and cellular models. Collagen-induced arthritis (CIA) in DBA/1J Nampt +/- mice was evaluated by ELISA, micro-CT, and RNA-sequencing (RNA-seq). In vitro Nampt loss-of-function and gain-of-function studies on osteoclastogenesis were examined by TRAP staining, nascent RNA capture, luciferase reporter assays, and ChIP-PCR. Nampt-deficient mice presented with suppressed inflammatory bone destruction and disease progression in a CIA mouse model. Nampt expression was required for the epigenetic regulation of the Nfatc1 promoter and osteoclastogenesis. Finally, RNA-seq identified 690 differentially expressed genes in whole ankle joints which associated (P?<?0.05) with Nampt expression and CIA. Selected target was validated by RT-PCR or functional characterization. We have provided evidence that NAMPT functions as a genetic risk factor and a potential therapeutic target to RA.

| S-EPMC6365567 | biostudies-literature

Ethyl acetate fraction of Lentinula edodes (LEA) inhibits osteoclastogenesis by suppressing NFATc1 expression

Project description:Ethyl acetate fraction of Lentinula edodes (LEA) inhibits osteoclastogenesis by suppressing NFATc1 expression

| PRJNA598711 | ENA

Ethyl acetate fraction of Lentinula edodes (LEA) inhibits osteoclastogenesis by suppressing NFATc1 expression

Project description:To screen for altered gene expression during osteoclastogenesis, BMM cells treated with RANKL or RANKL+LEA were subjected to gene expression profiling.

2020-02-24 | GSE142866 | GEO

Human FcγRIIa mediates osteoclastogenesis through a novel noncanonical pathway independent of RANKL and inflammatory cytokines

Project description:Under physiological conditions, osteoclasts (OCs) are generated from monocytic osteoprecursors under the stimulation of RANKL and M-CSF, requiring co-stimulatory signals from Fc receptor common γ chain (FcRγ) or DNAX-activated protein 12. It has been proposed that immune complexes (ICs) directly potentiate RANKL-mediated osteoclastogenesis by triggering FcγR-coupled Fcγ receptors (FcγRs), thereby linking IC accumulation and pathological osteolysis under various disease conditions. However, whether ICs possess pro-osteoclastogenic potential independent of RANKL is unknown. Here we demonstrate that IgG ICs alone can drive the differentiation of human blood monocytes into nonclassical OCs (NOCs) phenotypically and functionally distinguishable from RANKL-induced classical OCs (COCs). This novel noncanonical osteoclastogenesis pathway is triggered by full crosslinking of human FcγRIIa (hFcγRIIa), or co-ligation of hFcγRIIa and TLR4, and signals through the Src family kinase-STAT5 axis without inducing the expression of NFATc1, a master transcription factor for the previously described osteoclastogenesis pathways. Surprisingly, IgG ICs strongly overrule the generation of COCs driven by RANKL in vitro. More importantly, TRAP+ OCs found in the inflammatory joint tissues of hFcγRIIa-transgenic mice with collagen-induced arthritis bear the NFATc1- phenotype. Our results unmask the “double faces” of IgG ICs in health and disease, and suggest a novel and important pathway for ICs contributing to pathological bone erosion in inflammatory arthritis.

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Transcriptome analysis of WEHI B lymphoma cells overexpressing individual NFATc1 proteins

Project description:In lymphocytes, NFATc1 is the most prominent NFAT transcription factor which play a crucial role in the fate and activity of peripheral T and B cells. NFATc1 is synthesized in two prominent isoforms, the inducible short isoform NFATc1/aA and the constitutively expressed long isoform NFATc1/C. Several lines of evidence suggested that both isoforms differ markedly in their function. It was speculated that NFATc1/aA supports the proliferation and survival of lymphocytes, whereas NFATc1/C should support apoptosis and anergy induction. To proof this hypothesis we established WEHI 231 B lymphoma cells that stably (over-) express either NFATc1/aA or NFATc1/C. In preliminary experiments we could should that WEHI cells overexpressing NFATc1/aA were protected against apoptosis induction, while cells overexpressing NFATc1/C should a higher apoptosis rate. Transcriptom analysis of WEHI-231 cells overexpressing either NFATc1/aA or NFATc1/C were performed, along with a control group of WEHI-231 cells overexpressing the E.coli enzyme BirA Ligase (which is also present in all target cell lines since for further molecular assays the NFATc1 proteins were expressed as chimeric protein containing C-terminal bio-tags. The experimental results obtained indicate that the both NFATc1 proteins, NFATc1/aA and NFATc1/C, differ tremendously in their transcriptional properties.

2016-07-01 | E-MTAB-4665 | biostudies-arrayexpress

Global analysis of NFATc1 targets in human vascular endothelial cells

Project description:We performed the newly mapping of genome-wide NFATc1 binding events in VEGF-stimulated primary cultured endothelial cells, by chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq). Combined NFATc1 ChIP-seq profile and the epigenetic histone marks revealed that predominant NFATc1-occupied peaks were overlapped with promoter marking but not silencer marking. DNA microarrays with NFATc1 expression or knockdown indicated the predominant NFATc1 binding targets were correlated with induced patterns. To determine NFATc1-regulated genes, a total of 5 samples were derived from human umbilical vein endothelial cells (HUVECs) stimulated with or without 50ng/mL VEGF (VEGF 60min and 0min, respectively), pretreated with cyclosporine A (VEGF 60min plus CsA) and infected with adenovirus expressing the control or constitutively active NFATc1 (Ad-control and Ad-NFATc1).

2013-09-01 | E-GEOD-49426 | biostudies-arrayexpress

Nfatc1 promotes stem cell contribution to squamous skin tumors

Project description:We find that epithelial-specific deletion of Nfatc1 decreases skin tumor susceptibility in mice subjected to DMBA/TPA carcinogenesis. To probe the molecular mechanisms by which Nfatc1 may regulate tumorigenesis, we identify gene expression changes associated with constitutive NFATc1 activation in primary mouse keratinocytes. Constitutively active NFATc1 activity in primary mouse keratinocytes to investigate how Nfatc1 regulates tumor initiation in the skin. Primary mouse keratinocytes were infected with retroviruses encoding a recombinant human NFATc1 containing mutations in the autoinhibitory domain that render it constitutively active (CAC1). Keratinocytes infected with retroviruses generated from an empty MSCV reotroviral vector were used as a control. Three biological replicates were performed.

2014-05-06 | E-GEOD-57314 | biostudies-arrayexpress

Comparison expression data from wild-type and NFATc1-deficient osteoclasts

Project description:Genetic deletion of Nfatc1 in mice results in profound osteoclast-poor osteopetrosis, a high bone mass state caused by a lack of osteoclast activity. We hypothesized that the family of NFATc1 regulated transcripts in the osteoclast would be enriched for genes associated with osteoclast function. We used microarrays profile gene expression in wild-type and NFATc1-deficient osteoclasts generated in vitro to identify NFATc1-dependent transcripts in osteoclasts. Bone marrow macrophages from wild-type and mice with an induced deficiency of NFATc1 (NFATc1 fl/fl MxCre+ mice where NFATc1 excision was induced by polyIC treatment) were cultured ex vivo in MCSF and RANKL for 3 days. 2 biological replicates were assayed for each genotype.

2012-08-18 | E-GEOD-37219 | biostudies-arrayexpress

Nfatc1 enhances stem cell contribution to squamous skin tumors

2014-05-06 | GSE57314 | GEO