Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Rebalancing gene haploinsufficiency in vivo by targeting chromatin

ABSTRACT: Here we show that the T-box transcription factor encoded by Tbx1 positively regulates monomethylation of histone 3 lysine 4 (H3K4me1) at a significant number of regions that it occupies throughout the genome, often located at the 3' end of target genes. Treatment of cells with Tranylcypromine (TCP), an inhibitor of histone demethylases, rescues the expression of approx. one third of the genes dysregulated by Tbx1 suppression and it rebalances H3K4me1 levels at many Tbx1 occupied sites. In addition, TCP treatment of mouse models of the 22q11.2DS ameliorates substantially the cardiovascular phenotype.

ORGANISM(S): Mus musculus

PROVIDER: GSE79941 | GEO | 2016/04/11

SECONDARY ACCESSION(S): PRJNA317495

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Identification of H3 Lysine 4 Monomethylation Associated Proteins at Mammalian Enhancers

Project description:Enhancers act to regulate cell type specific gene expression by facilitating the transcription of target genes. In mammalian cells active or primed enhancers are commonly marked by monomethylation of Histone H3 at lysine 4 (H3K4me1) in a cell-type specific manner. Whether and how this histone modification regulates enhancer-dependent transcription programs in mammals has been unclear. In the present study, we conducted SILAC Mass-spec experiments with mono-nucleosomes and identified multiple H3K4me1 associated proteins, including proteins involved in chromatin remodeling. We demonstrate that H3K4me1 augments the association of the chromatin remodeling complex BAF to enhancers in vivo. Furthermore we show that in vitro, H3K4me1 nucleosomes are more efficiently remodeled by the BAF complex. Crystal structures of a BAF component BAF45c further reveal that monomethylation, but not trimethylation, is accommodated in this protein’s H3K4 binding site. Our results suggest that H3K4me1 plays an active role at enhancers by facilitating the binding of the BAF complex and possibly other chromatin regulators.

2018-10-23 | PXD007942 | Pride

Rebalancing gene haploinsufficiency in vivo by targeting chromatin.

Project description:Congenital heart disease (CHD) affects eight out of 1,000 live births and is a major social and health-care burden. A common genetic cause of CHD is the 22q11.2 deletion, which is the basis of the homonymous deletion syndrome (22q11.2DS), also known as DiGeorge syndrome. Most of its clinical spectrum is caused by haploinsufficiency of Tbx1, a gene encoding a T-box transcription factor. Here we show that Tbx1 positively regulates monomethylation of histone 3 lysine 4 (H3K4me1) through interaction with and recruitment of histone methyltransferases. Treatment of cells with tranylcypromine (TCP), an inhibitor of histone demethylases, rebalances the loss of H3K4me1 and rescues the expression of approximately one-third of the genes dysregulated by Tbx1 suppression. In Tbx1 mouse mutants, TCP treatment ameliorates substantially the cardiovascular phenotype. These data suggest that epigenetic drugs may represent a potential therapeutic strategy for rescue of gene haploinsufficiency phenotypes, including structural defects.

| S-EPMC4895808 | biostudies-literature

Reduced dosage of Î²-catenin genetically rescues intracardiac anomalies in a Tbx1 conditional null mouse model of 22q11.2 deletion syndrome

Project description:Approximately 60-70% of patients with 22q11.2 deletion syndrome (22q11.2DS; velo-cardio-facial syndrome/DiGeorge syndrome) have cardiac outflow tract anomalies including persistent truncus arteriosus (PTA) as the most severe defect. Among the genes in the 22q11.2 region, TBX1, encoding a T-box transcription factor is a major candidate for cardiovascular malformations and its inactivation in mice results in a PTA. To identify novel signaling mechanisms that function downstream, we found that Tbx1 restricts canonical Wnt signaling in the pharyngeal apparatus. To test for tissue specificity within the pharyngeal apparatus, we inactivated Tbx1 in the anterior portion of the secondary heart field (AHF) mesoderm using the Mef2c-AHF-Cre allele and observed a full penetrant PTA (n = 30). Tbx1 promotes progenitor cells but restricts differentiation whereas Wnt signaling, in the AHF, promotes cardiomyocyte differentiation. To determine whether Tbx1 and canonical Wnt signaling act in opposing pathways, both alleles of Tbx1 and one Î²-catenin allele were inactivated in the AHF and 85% of them (n = 35) showed partial or complete rescue. The antagonistic function of the two pathways was further confirmed by gene expression profiling, indicating that these two pathways provide a key balance in the AHF to prevent premature differentiation of progenitor cells prior to reaching the cardiac outflow tract. We inactivatedTbx1 and beta-catenin allele to identify function of Tbx1 and beta-catenin in the anterior portion of the secondary heart field (AHF) mesoderm. We also inactivated both alleles of Tbx1 and one Î²-catenin alleles (rescue design) to determine whether Tbx1 and canonical Wnt signaling act in opposing pathways

2016-09-01 | E-GEOD-78125 | biostudies-arrayexpress

Genome-wide maps of histone modification in mast cells

Project description:Epigenomic studies demonstrate that monomethylation of lysine residue 4 on histone 3 (H3K4me1) marks genes that are poised to be transcribed, whereas acetylation of lysine residue 27 on histone 3 (H3K27ac) identifies genes that are actively being transcribed. The combined presence of H3K4me1 and H3K27ac modifications predicts enhancer activity. To detect these marks genome-wide, we performed H3K4me1 and H3K27ac ChIP-seq analysis of mast cells to identify the putative mast cell enhancers.

2018-03-01 | GSE97253 | GEO

Transcription profiling of Tbx1 function in adult myocardial infarction hearts [bulk RNA-seq]

Project description:Post-myocardial infarction (Post-MI) heart failure is an unanswered clinical challenge. Current immunological intervention trials to reduce MI damage are unsatisfactory. Tbx1, the major 22q11.2 deletion syndrome (22q11.2DS) disease gene, reactivated in cardiac lymphatic endothelial cells (LECs) to promote post-MI repair. Endothelial deletion of Tbx1 deteriorated post-MI cardiac function. To identify the initial endothelial-derived gene expression changes that are responsible for lymphangiogenesis and cell non-autonomous functions towards immune cells after MI, we enriched CD31+ endothelial cells from 5 dpMI Ctrl and Tbx1cko hearts and performed RNA-seq. In conclusion, our findings revealed that Tbx1 can promote lymphangiogenesis and alleviate excessive cardiac inflammation in post MI hearts.

2023-08-28 | GSE137063 | GEO

Genome-wide maps of chromatin state difference in KMT2D Knockdown/Control PC-3 Cells

Project description:KMT2D is a histone methyltransferase for catalyzing the monomethylation of H3K4. The H3K4me1 is prominent on active enhancers and participates in gene expression regulation. Loss of KMT2D in cancer has been approved to impact on a set of gene expression by the reduction of H3K4me1 level. To identify the direct target of KMT2D in prostate cancer, we performed H3K4me1 ChIP-seq with KMT2D knockdown and control PC-3 cells.

2018-10-23 | GSE94816 | GEO

The MLL3/MLL4 branch of the COMPASS family regulates H3K4 monomethylation at enhancers

Project description:Histone H3 lysine 4 (H3K4) can be mono-, di-, and trimethylated by members of the COMPASS (COMplex of Proteins ASsociated with Set1) family from yeast to human and these modifications can be found at distinct regions of the genome. Monomethylation of histone H3K4 (H3K4me1) is relatively more enriched at metazoan enhancer regions compared to trimethylated histone H3K4 (H3K4me3), which are found at transcription start sites in all eukaryotes. Our recent studies in Drosophila demonstrated that the Trithorax-related (Trr) branch of the COMPASS family regulates enhancer activity and is responsible for the implementation of H3K4me1 at these regions. There are six COMPASS family members in mammals, two of which, MLL3 and MLL4, are most closely related to Drosophila Trr. Here, we use ChIP-seq of this class of COMPASS family members in both human HCT116 cells and mouse embryonic stem cells and find that MLL4 is preferentially found at enhancer regions. MLL3 and MLL4 are frequently mutated in cancer, and indeed, the widely used HCT116 cancer cell line contains inactivating mutations in the MLL3 gene. Using HCT116 cells in which MLL4 has also been knocked out, we demonstrate that MLL4 is a major regulator of H3K4me1 in these cells, with the greatest loss of monomethylation at enhancer regions. Moreover, we found a redundant role between Mll3 and Mll4 in enhancer H3K4 monomethylation in mouse embryonic fibroblast (MEF) cells. These findings suggest that mammalian MLL3/MLL4 function in the regulation of enhancer activity and enhancer-promoter communication during gene expression and that mutations of MLL3 and MLL4 found in cancer could exert their properties through enhancer malfunction. ChIP-Seq in mouse embryonic stem (mES) cells for MLL4. ChIP-seq of MLL4 and p300 in human parental HCT116 cells. ChIP-seq of H3K4me1, H3K4me2 and H3K4me3 in parental HCT116 cells and HCT116 cells with Mll4∆set.

2013-09-30 | E-GEOD-51176 | biostudies-arrayexpress

Transcription factor Runx1 cooperates with MyoD and c-Jun to regulate the balance of myoblast proliferation/differentiation [ChIP-Seq Histone]

Project description:Runx1 is expressed in regenrating muscle, specifically in the muscle adult stem cells- the satellite cells. Its exact role and target genes were yet to be identified. We report here the genome wide histone modification using an active enhancer pattern of H3K4 monomethylation (H3K4me1) and H3K27 acetylation (H3K27ac).

2015-07-23 | GSE63572 | GEO

Transcription factor Runx1 cooperates with MyoD and c-Jun to regulate the balance of myoblast proliferation/differentiation [ChIP-Seq Histone]

2015-07-23 | E-GEOD-63572 | biostudies-arrayexpress

Reduced dosage of β-catenin genetically rescues intracardiac anomalies in a Tbx1 conditional null mouse model of 22q11.2 deletion syndrome

Project description:Approximately 60-70% of patients with 22q11.2 deletion syndrome (22q11.2DS; velo-cardio-facial syndrome/DiGeorge syndrome) have cardiac outflow tract anomalies including persistent truncus arteriosus (PTA) as the most severe defect. Among the genes in the 22q11.2 region, TBX1, encoding a T-box transcription factor is a major candidate for cardiovascular malformations and its inactivation in mice results in a PTA. To identify novel signaling mechanisms that function downstream, we found that Tbx1 restricts canonical Wnt signaling in the pharyngeal apparatus. To test for tissue specificity within the pharyngeal apparatus, we inactivated Tbx1 in the anterior portion of the secondary heart field (AHF) mesoderm using the Mef2c-AHF-Cre allele and observed a full penetrant PTA (n = 30). Tbx1 promotes progenitor cells but restricts differentiation whereas Wnt signaling, in the AHF, promotes cardiomyocyte differentiation. To determine whether Tbx1 and canonical Wnt signaling act in opposing pathways, both alleles of Tbx1 and one β-catenin allele were inactivated in the AHF and 85% of them (n = 35) showed partial or complete rescue. The antagonistic function of the two pathways was further confirmed by gene expression profiling, indicating that these two pathways provide a key balance in the AHF to prevent premature differentiation of progenitor cells prior to reaching the cardiac outflow tract.

2016-09-01 | GSE78125 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data