Identify VDR targets within the proximal and distal intestine using a genome-wide method.
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE144969 | GEO | 2023/02/05
REPOSITORIES: GEO
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Project description:1,25-Dihydroxyvitamin D3 (1,25(OH)2D3) plays an integral role in calcium homeostasis in higher organisms through its actions in the intestine, kidney and skeleton. Interestingly, while several intestinal genes are known to play a contributory role in calcium homeostasis, the entire caste of key components remains to be identified. To examine the vitamin D receptor (VDR) cistrome in this issue, we conducted a ChIP-seq analysis of binding sites for the VDR across the proximal intestine in vitamin D-sufficient normal mice treated with vehicle or 1,25(OH)2D3. The residual VDR cistrome was comprised of 4617 sites which was increased almost 4-fold following hormone treatment. Interestingly, the majority of the genes regulated by 1,25(OH)2D3 in each diet group as well as those found in common in both groups contained frequent VDR sites that likely regulated their expression. This study revealed a global VDR cistrome regulating a network of genes in the intestine that both represent direct targets of vitamin D action in mice and are involved in calcium absorption. Wildtype mice were fed a standard rodent chow diet (Harlan Teklad, #5008). At 8 weeks of age, 3 mice were treated with 1,25(OH)2D3 (10 ng/g bw) or vehicle control and the proximal half of the small intestine (duodenum and jejunum) was collected 1 h later.
2015-06-03 | E-GEOD-69179 | biostudies-arrayexpress
Project description:Many of the transcriptional and growth regulating activities of 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) in the intestine and colon are recapitulated in the human colorectal cancer cell LS180. We therefore used this line together with ChIP-seq and gene expression analyses to identify the vitamin D receptor (VDR)/retinoid x receptor (RXR) and TCF7L2(TCF4)/β-catenin cistromes and the genes that they regulate. VDR and RXR co-localized to predominantly promoter distal, VDRE-containing sites in a largely ligand-dependent manner. These regulatory sites control the expression of both known as well as novel 1,25(OH)2D3 target genes. TCF4 and β-catenin cistromes partially overlapped, contained TCF/LEF consensus elements, and were only modestly influenced by 1,25(OH)2D3. However, the two heterodimer complexes co-localized at sites near a limited set of genes that included c-FOS and c-MYC; the expression of both genes was modulated by 1,25(OH)2D3. At the c-FOS gene, both VDR/RXR and TCF4/β-catenin bound to a single distal enhancer located 24 kb upstream of the transcriptional start site. At the c-MYC locus, however, binding was noted at a cluster of sites between -139 and -165 kb and at a site located -335 kb upstream. Examined as isolated enhancer fragments, these regions exhibited basal and 1,25(OH)2D3-inducible activities that were interlinked to both VDR and β-catenin activation. These data reveal additional complexity in the regulation of target genes by 1,25(OH)2D3 and support a direct action of both VDR and the TCF4/β-catenin regulatory complex at c-FOS and c-MYC.
2011-11-22 | GSE31939 | GEO
Project description:1,25-Dihydroxyvitamin D3 (1,25(OH)2D3) plays an integral role in calcium homeostasis in higher organisms through its actions in the intestine, kidney and skeleton. Interestingly, while several intestinal genes are known to play a contributory role in calcium homeostasis, the entire caste of key components remains to be identified. To examine the vitamin D receptor (VDR) cistrome in this issue, we conducted a ChIP-seq analysis of binding sites for the VDR across the proximal intestine in vitamin D-sufficient normal mice treated with vehicle or 1,25(OH)2D3. The residual VDR cistrome was comprised of 4617 sites which was increased almost 4-fold following hormone treatment. Interestingly, the majority of the genes regulated by 1,25(OH)2D3 in each diet group as well as those found in common in both groups contained frequent VDR sites that likely regulated their expression. This study revealed a global VDR cistrome regulating a network of genes in the intestine that both represent direct targets of vitamin D action in mice and are involved in calcium absorption.
2015-06-03 | GSE69179 | GEO
Project description:The genome-wide analysis of the binding sites of the transcription factor vitamin D receptor (VDR) is essential for a global appreciation the physiological impact of the nuclear hormone 1M-NM-1,25-dihydroxyvitamin D3 (1,25(OH)2D3). Genome-wide analysis of lipopolysaccharide (LPS)-polarized THP-1 human monocytic leukemia cells via chromatin immunoprecipitation (ChIP) coupled with massive parallel sequencing (ChIP-seq) resulted in 1,318 high-confidence VDR binding sites, of which 789 and 364 occurred uniquely with and without 1,25(OH)2D3 stimulation, while only 165 were common. We re-analyzed five public VDR ChIP-seq datasets with identical peak calling settings (MACS, version 2) and found in total 23,409 non-overlapping VDR binding sites, 75% of which are unique within the six analyzed cellular models. LPS-differentiated THP-1 cells have 22% more genomic VDR locations than undifferentiated cells and both cell types display more overlap in their VDR locations than the other investigated cell types. In general, the intersection of VDR binding profiles of ligand-stimulated cells is higher than those of unstimulated cells. De novo binding site searches and DR3-type binding site screening using HOMER of the six VDR ChIP-seq datasets suggest that DR3 sites are strongly associated with the ligand-responsiveness of VDR occupation. Importantly, all VDR ChIP-seq datasets display the same relationship between the VDR occupancy and the percentage of DR3-type sequences below the peak summits. The comparative analysis of six VDR ChIP-seq datasets demonstrated that the mechanistic basis for the action of the VDR is independent of the cell type. Only the minority of genome-wide VDR binding sites contains a DR3-type sequence. Moreover, the total number of identified VDR binding sites in each ligand-stimulated cell line inversely correlates with the percentage of peak summits with DR3 sites. Systematic reanalysis of 5 published VDR ChIP-seq datasets together with a new dataset from 24 h LPS-treated THP-1 cells at the unstimulated state and after 80 min ligand (10 nM 1M-NM-1,25(OH)2D3 (1,25D, calcitriol)) treatment. See GSM1280896 and GSM1280896 Sample records for data processing information. GSE53041_README.txt has additional details.
2014-11-14 | E-GEOD-53041 | biostudies-arrayexpress
Project description:ChIP-seq for VDR in THP-1 cells after stimulation with the the natural VDR ligand 1,25-dihydroxyvitamin D3 (1,25(OH)2D3)
2017-07-18 | GSE89431 | GEO
Project description:Genome-wide VDR chromatin binding sites in colonic organoids stimulated with 1,25(OH)2D3 for 2h.
2024-07-01 | GSE206176 | GEO
Project description:The vitamin D receptor (VDR) has been knocked out in monocytic THP-1 cells after stimulation of ko and control cells with the the natural VDR ligand 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), quadruplicate mRNA-seq has been performed
2021-09-06 | GSE157514 | GEO
Project description:To explore this question, we will use three different male mouse models including VDR KO mice and transgenic mice with hVDR only expressed in the distal intestine (KO/VDR-Tg). All the mice which are C57BL6J background will be raised until 2-3 months old with standard chow diet (n=3 mice per genotype group). Compared to the KO/VDR-Tg mice without any injection, the same type of mice will be administered 1 ng/g bw 1,25(OH)2D3 at 48, 24 and 6 hours prior to termination to determine both early and late effects of 1,25(OH)2D3.
2020-11-04 | GSE144978 | GEO
Project description:The genome-wide analysis of the binding sites of the transcription factor vitamin D receptor (VDR) is essential for a global appreciation the physiological impact of the nuclear hormone 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3). Genome-wide analysis of lipopolysaccharide (LPS)-polarized THP-1 human monocytic leukemia cells via chromatin immunoprecipitation (ChIP) coupled with massive parallel sequencing (ChIP-seq) resulted in 1,318 high-confidence VDR binding sites, of which 789 and 364 occurred uniquely with and without 1,25(OH)2D3 stimulation, while only 165 were common. We re-analyzed five public VDR ChIP-seq datasets with identical peak calling settings (MACS, version 2) and found in total 23,409 non-overlapping VDR binding sites, 75% of which are unique within the six analyzed cellular models. LPS-differentiated THP-1 cells have 22% more genomic VDR locations than undifferentiated cells and both cell types display more overlap in their VDR locations than the other investigated cell types. In general, the intersection of VDR binding profiles of ligand-stimulated cells is higher than those of unstimulated cells. De novo binding site searches and DR3-type binding site screening using HOMER of the six VDR ChIP-seq datasets suggest that DR3 sites are strongly associated with the ligand-responsiveness of VDR occupation. Importantly, all VDR ChIP-seq datasets display the same relationship between the VDR occupancy and the percentage of DR3-type sequences below the peak summits. The comparative analysis of six VDR ChIP-seq datasets demonstrated that the mechanistic basis for the action of the VDR is independent of the cell type. Only the minority of genome-wide VDR binding sites contains a DR3-type sequence. Moreover, the total number of identified VDR binding sites in each ligand-stimulated cell line inversely correlates with the percentage of peak summits with DR3 sites.
2014-11-14 | GSE53041 | GEO
Project description:The biologically active form of vitamin D, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), is a direct regulator of gene transcription, since it is the only high affinity natural ligand of the transcription factor vitamin D receptor (VDR). Transcriptome-wide analysis of THP-1 human monocyte-like cells had indicated more than 600 genes to be significantly (p < 0.05) regulated after a 4 h stimulation with 1,25(OH)2D3. In this study, we screened of the list of primary vitamin D targets for genes encoding for transcriptional regulators and selected those of the activating transcription factor NFE2 and the transcriptional repressor BCL6. Both genes are under the control of two VDR loci and are the only 1,25(OH)2D3 targets within their respective chromosomal domain. However, NFE2 mRNA was rapidly up-regulated, while the increase of BCL6 expression showed a slower rise. After 24 h incubation of THP-1 cells with 1,25(OH)2D3 more than 1,500 genes responded significantly (p < 0.001), of which 132 where more than 2-fold induced. Public chromatin immunoprecipitation-sequencing datasets suggested that the majority of these genes could be targets of NFE2 or BCL6. In time course experiments we displayed for representative gene examples the specific delayed response of secondary 1,25(OH)2D3 targets and confirmed for the respective chromosomal domains the genomic binding of NFE2, BCL6 and VDR. In conclusion, our study indicated that the physiological response of monocytes to 1,25(OH)2D3 involves the action of NFE2 and BCL6. THP-1 cells were treated 24 h either with 0.1% ethanol (vehicle, control) or 1?,25(OH)2D3 (1,25D)
2015-04-26 | E-GEOD-60102 | biostudies-arrayexpress