Lysine methyltransferase Kmt2d regulates naive CD8+ T cell activation-induced survival
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE217656 | GEO | 2023/01/11
REPOSITORIES: GEO
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Project description:We identified KMT2D target loci in OCI-LY7 by ChIPseq. KMT2D ChIPseq was carried out in the LY7 cell line (n=1).
2015-08-28 | E-GEOD-67314 | biostudies-arrayexpress
Project description:Kabuki Syndrome (KS) is a multisystemic rare disorder, characterized by growth delay, distinctive facial features, intellectual disability, and rarely autism spectrum disorder. This condition is mostly caused by de novo mutations of KMT2D, encoding a catalytic subunit of the COMPASS complex involved in enhancer regulation. KMT2D catalyzes the deposition of histone-3-lysine-4 mono-methyl (H3K4Me1) that marks active and poised enhancers. To assess the impact of KMT2D mutations in the chromatin landscape of KS tissues, we have generated patient-derived induced pluripotent stem cells (iPSC), which we further differentiated into neural crest stem cells (NCSC), mesenchymal stem cells (MSC) and cortical neurons (iN). In addition, we further collected blood samples from 5 additional KS patients. To complete our disease modeling cohort we generated an isogenic KMT2D mutant line from human embryonic stem cells, which we differentiated into neural precursor and mature neurons. Micro-electrode-array (MEA)-based neural network analysis of KS iNs revealed an altered pattern of spontaneous network-bursts in a Kabuki-specific pattern. RNA-seq profiling was performed to relate this aberrant MEA pattern to transcriptional dysregulations, revealing that dysregulated genes were enriched for neuronal functions, such as ion channels, synapse activity, and electrophysiological activity. Here we show that KMT2D haploinsufficiency tends to heavily affect the transcriptome of cortical neurons and differentiated tissues while sparing multipotent states, suggesting that KMT2D has a most prevalent role in terminally differentiated cell and activate transcriptional circuitry unique to each cell type. Moreover, thorough profiling of H3K4Me1 unveiled the almost complete uncoupling between this chromatin mark and the regulatory effects of KMT2D on transcription, which is instead reflected by a defect of H3K27Ac. By integrating RNA-seq with ChIP-seq data we defined TEAD and REST as the master effectors of KMT2D haploinsufficiency. Also, we identified a subset of genes whose regulation is controlled by the balance between KMT2D and EZH2 dosage. Finally, we identified the bona fide direct targets of KMT2D in healthy and KS mature cortical neurons and TEAD2 as the main proxy of KMT2D dysregulation in KS. Overall, our study provides the transcriptional and epigenomic characterization of patient-derived tissues as well as iPSCs and differentiated disease-relevant cell types, as well as the identification of KMT2D direct target in cortical neurons, together with the identification of a neuronal phenotype of the spontaneous electrical activity.
2022-12-25 | E-MTAB-10244 | biostudies-arrayexpress
Project description:Kabuki Syndrome (KS) is a multisystemic rare disorder, characterized by growth delay, distinctive facial features, intellectual disability, and rarely autism spectrum disorder. This condition is mostly caused by de novo mutations of KMT2D, encoding a catalytic subunit of the COMPASS complex involved in enhancer regulation. KMT2D catalyzes the deposition of histone-3-lysine-4 mono-methyl (H3K4Me1) that marks active and poised enhancers. To assess the impact of KMT2D mutations in the chromatin landscape of KS tissues, we have generated patient-derived induced pluripotent stem cells (iPSC), which we further differentiated into neural crest stem cells (NCSC), mesenchymal stem cells (MSC) and cortical neurons (iN). In addition, we further collected blood samples from 5 additional KS patients. To complete our disease modeling cohort we generated an isogenic KMT2D mutant line from human embryonic stem cells, which we differentiated into neural precursor and mature neurons. Micro-electrode-array (MEA)-based neural network analysis of KS iNs revealed an altered pattern of spontaneous network-bursts in a Kabuki-specific pattern. RNA-seq profiling was performed to relate this aberrant MEA pattern to transcriptional dysregulations, revealing that dysregulated genes were enriched for neuronal functions, such as ion channels, synapse activity, and electrophysiological activity. Here we show that KMT2D haploinsufficiency tends to heavily affect the transcriptome of cortical neurons and differentiated tissues while sparing multipotent states, suggesting that KMT2D has a most prevalent role in terminally differentiated cell and activate transcriptional circuitry unique to each cell type. Moreover, thorough profiling of H3K4Me1 unveiled the almost complete uncoupling between this chromatin mark and the regulatory effects of KMT2D on transcription, which is instead reflected by a defect of H3K27Ac. By integrating RNA-seq with ChIP-seq data we defined TEAD and REST as the master effectors of KMT2D haploinsufficiency. Also, we identified a subset of genes whose regulation is controlled by the balance between KMT2D and EZH2 dosage. Finally, we identified the bona fide direct targets of KMT2D in healthy and KS mature cortical neurons and TEAD2 as the main proxy of KMT2D dysregulation in KS. Overall, our study provides the transcriptional and epigenomic characterization of patient-derived tissues as well as iPSCs and differentiated disease-relevant cell types, as well as the identification of KMT2D direct target in cortical neurons, together with the identification of a neuronal phenotype of the spontaneous electrical activity.
2024-06-30 | E-MTAB-10561 | biostudies-arrayexpress
Project description:Lysine methyltransferase Kmt2d regulates naive CD8+ T cell activation-induced survival
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Project description:The crosstalk between H3K4 monomethylation and DNA methylation has been receiving little attention to date. We investigated a mouse model harboring a loss-of-function mutation of lysine methyltransferase 2D (KMT2D), which catalyzes the monomethylation of lysine 4 on histone H3. We performed H3K4me1 ChIP-seq in spleen B cells with the wild type (WT) KMT2D as well as heterozygous (HET) and homozygous (HOM) chr15: 98,835,228 A>T KMT2D mutation. Alongside, using WGBS, we performed genome-wide DNA methylation profiling in spleen B cells with the WT KMT2D as well as HET and HOM chr15: 98,835,228 A>T KMT2D mutation.
2019-01-23 | GSE104533 | GEO
Project description:The crosstalk between H3K4 monomethylation and DNA methylation has been receiving little attention to date. We investigated a mouse model harboring a loss-of-function mutation of lysine methyltransferase 2D (KMT2D), which catalyzes the monomethylation of lysine 4 on histone H3. We performed H3K4me1 ChIP-seq in spleen B cells with the wild type (WT) KMT2D as well as heterozygous (HET) and homozygous (HOM) chr15: 98,835,228 A>T KMT2D mutation. Alongside, using WGBS, we performed genome-wide DNA methylation profiling in spleen B cells with the WT KMT2D as well as HET and HOM chr15: 98,835,228 A>T KMT2D mutation.
2019-01-23 | GSE104781 | GEO
Project description:Define and compare H3K4me2 enrichment in murine B220 cells transduced with empty vector (ct) or KMT2D-shRNA. Compare gene expression by RNAseq in murine B220 cells transduced with empty vector (ct) or KMT2D-shRNA. Using H3K4me1/2 ChIPseq and RNAseq we profiled murine B220 purified cells from tumors transduced with EV (n=3) or KMT2D-shRNA (n=3).
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Project description:Histone-lysine N-methyltransferase 2D (KMT2D), also known as MLL4 and MLL2 in humans and Mll4 in mice, belongs to a family of mammalian histone H3 lysine 4 (H3K4) methyltransferases. It is a large protein over 5500 amino acids in size and is partially functionally redundant with KMT2C. KMT2D is widely expressed in adult tissues and is essential for early embryonic development. The C-terminal SET domain is responsible for its H3K4 methyltransferase activity and is necessary for maintaining KMT2D protein stability in cells. KMT2D associates with WRAD (WDR5, RbBP5, ASH2L, and DPY30), NCOA6, PTIP, PA1, and H3K27 demethylase UTX in one protein complex. It acts as a scaffold protein within the complex and is responsible for maintaining the stability of UTX. KMT2D is a major mammalian H3K4 mono-methyltransferase and co-localizes with lineage determining transcription factors on transcriptional enhancers. It is required for the binding of histone H3K27 acetyltransferases CBP and p300 on enhancers, enhancer activation and cell-type specific gene expression during differentiation. KMT2D plays critical roles in regulating development, differentiation, metabolism, and tumor suppression. It is frequently mutated in developmental diseases, such as Kabuki syndrome and congenital heart disease, and various forms of cancer. Further understanding of the mechanism through which KMT2D regulates gene expression will reveal why KMT2D mutations are so harmful and may help generate novel therapeutic approaches.
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Project description:Histone lysine methyltransferases KMT2C and KMT2D are among the most commonly mutated genes in the highly metastatic TNBC subtype of breast cancer. However, it is not known if mutations of either of these genes similarly effect epigenomic and transcriptomic landscape or if a specific downstream target might influence metastases. Here, we generated heterogenous Kmt2c or Kmt2d KO murine TNBC cell lines side-by-side and performed in vivo metastases assay in syngeneic immunocompetent mice. Deficiency for either Kmt2c or Kmt2d, both, induced brain metastases from formerly non-metastatic cells. scRNAseq showed activation of pro-inflammatory pathways but conversely also increase of immune checkpoint blocking genes. Interestingly, histone mass spectrometry revealed changes of H3K27 but not the main substrate H3K4. However, ChIPseq for both, H3K4 and H3K27 modifications showed significant changes compared to wildtype cells. Strikingly, genome occupancy of H3K27me3 was reduced while H3K27 demethylase KDM6A was enriched on genomes of KO cells. Integration with gene expression data revealed significant correlations with histone and KDM6A ChIPseq, identifying them as a main driver of Kmt2c or Kmt2d KO-specific gene regulation. Although our datasets revealed more unique than shared signatures, we found Mmp3 being a common target upon Kmt2c or Kmt2d KO. Indeed, downregulation of Mmp3 reversed induction of Kmt2c and Kmt2d KO-dependent brain metastases. Finally, we found that Kdm6a knockdown reduces Mmp3 levels, again, leading to reduction of brain metastases of Kmt2c or Kmt2d KO cells.
2024-05-07 | MSV000094701 | MassIVE
Project description:Histone modifying genes involved in histone H3 lysine 4 (H3K4) methylation are critical for heart development, but the roles of these genes are not well understood. Here, we demonstrate a requirement for the H3K4 methyltransferase KMT2D in cardiac precursors and cardiomyocytes during cardiogenesis. Gene expression analysis revealed upregulation of hypoxia response genes, as well as downregulation of ion transport and cell cycle genes, leading to altered calcium handling and cell cycle defects. We further determined that myocardial Kmt2d deletion led to decreased H3K4me2 at promoters and enhancers. Finally, we identified KMT2D binding regions in cardiomyocytes, of which a subset was associated with decreased gene expression and decreased H3K4me2 in mutant hearts. This subset included genes related to ion transport, hypoxia-reoxygenation and cell cycle regulation, suggesting that KMT2D is important for these processes. Our findings indicate that KMT2D is essential for regulating cardiac gene expression during heart development via H3K4 dimethylation.
2016-01-28 | GSE75151 | GEO