Impairment of human terminal erythroid differentiation by histone deacetylase 5 deficiency
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE151743 | GEO | 2021/06/01
REPOSITORIES: GEO
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Project description:Class IIa histone deacetylases (HDACs) are signal-responsive regulators of gene expression involved in vascular homeostasis. To investigate the differential role of class IIa HDACs for the regulation of angiogenesis, we used siRNA to specifically suppress the individual HDAC isoenzymes. Among the HDAC isoforms tested, silencing of HDAC5 exhibited a unique pro-angiogenic effect evidenced by increased endothelial cell migration, sprouting and tube formation. Consistently, overexpression of HDAC5 decreased sprout formation, indicating that HDAC5 is a negative regulator of angiogenesis. The anti-angiogenic activity of HDAC5 was independent of MEF2 binding and its deacetylase activity, but required a nuclear localization indicating that HDAC5 might affect the transcriptional regulation of gene expression. To identify putative HDAC5 targets, we performed microarray expression analysis. Silencing of HDAC5 increased the expression of fibroblast growth factor 2 (FGF2) and angiogenic guidance factors including Slit2. Antagonization of FGF2 or Slit2 reduced sprout induction in response to HDAC5 siRNA. ChIP assays demonstrate that HDAC5 binds to the promoter of FGF2 and Slit2. In summary, HDAC5 represses angiogenic genes, like FGF2 and Slit2, which causally contribute to capillary-like sprouting of endothelial cells. The de-repression of angiogenic genes by HDAC5 inactivation may provide a useful therapeutic target for induction of angiogenesis. Experiment Overall Design: 6 samples: 3x siSCRAMBLED transfected HUVEC (control) + 3x siHDAC5 transfected HUVEC 24h after transfection
2009-04-11 | E-GEOD-15499 | biostudies-arrayexpress
Project description:Class IIa histone deacetylases (HDACs) are signal-responsive regulators of gene expression involved in vascular homeostasis. To investigate the differential role of class IIa HDACs for the regulation of angiogenesis, we used siRNA to specifically suppress the individual HDAC isoenzymes. Among the HDAC isoforms tested, silencing of HDAC5 exhibited a unique pro-angiogenic effect evidenced by increased endothelial cell migration, sprouting and tube formation. Consistently, overexpression of HDAC5 decreased sprout formation, indicating that HDAC5 is a negative regulator of angiogenesis. The anti-angiogenic activity of HDAC5 was independent of MEF2 binding and its deacetylase activity, but required a nuclear localization indicating that HDAC5 might affect the transcriptional regulation of gene expression. To identify putative HDAC5 targets, we performed microarray expression analysis. Silencing of HDAC5 increased the expression of fibroblast growth factor 2 (FGF2) and angiogenic guidance factors including Slit2. Antagonization of FGF2 or Slit2 reduced sprout induction in response to HDAC5 siRNA. ChIP assays demonstrate that HDAC5 binds to the promoter of FGF2 and Slit2. In summary, HDAC5 represses angiogenic genes, like FGF2 and Slit2, which causally contribute to capillary-like sprouting of endothelial cells. The de-repression of angiogenic genes by HDAC5 inactivation may provide a useful therapeutic target for induction of angiogenesis.
2009-04-02 | GSE15499 | GEO
Project description:Mammalian terminal erythropoiesis involves chromatin and nuclear condensation followed by enucleation. Late-stage erythroblasts undergo caspase-mediated nuclear opening formation that is important for nuclear condensation through partial release of histones. It remains unknown whether nuclear opening and histone release influence the three-dimensional (3D) genomic organization during terminal erythropoiesis. Here, we compared the genome wide 3D organization, chromatin accessibility, and transcriptome of the cultured mouse erythroid progenitors with and without the blocking of nuclear opening during differentiation. We found that terminal differentiation from the basophilic to orthochromatic stages of erythroblasts involves compaction and establishment of long-range interactions of the heterochromatin regions, which is associated with globally increased accessibility and upregulation of erythroid-related genes. Surprisingly, blocking of nuclear opening did not have a significant impact on 3D genomic organization, chromatin accessibility, or transcriptome despite the inhibition of histone release and nuclear condensation. Inhibition of nuclear opening also significantly affected enucleation. We further demonstrated this through a caspase-3 and 7 double knockout mouse model, which showed significant defects in nuclear opening and condensation with a compromise of enucleation in fetal erythroid progenitors. However, loss of these effector caspases had minimal effects on the red cell indices and survival of the recipient animals in a fetal liver cell transplantation model. Overall, these results indicate that nuclear opening and histone release may not be necessary for chromatin condensation and global transcriptome but are critical for nuclear condensation and efficient enucleation. These data also underline the robustness of enucleation despite the dysplastic or less condensed nucleus.
2022-12-16 | GSE185469 | GEO
Project description:Mammalian terminal erythropoiesis involves chromatin and nuclear condensation followed by enucleation. Late-stage erythroblasts undergo caspase-mediated nuclear opening formation that is important for nuclear condensation through partial release of histones. It remains unknown whether nuclear opening and histone release influence the three-dimensional (3D) genomic organization during terminal erythropoiesis. Here, we compared the genome wide 3D organization, chromatin accessibility, and transcriptome of the cultured mouse erythroid progenitors with and without the blocking of nuclear opening during differentiation. We found that terminal differentiation from the basophilic to orthochromatic stages of erythroblasts involves compaction and establishment of long-range interactions of the heterochromatin regions, which is associated with globally increased accessibility and upregulation of erythroid-related genes. Surprisingly, blocking of nuclear opening did not have a significant impact on 3D genomic organization, chromatin accessibility, or transcriptome despite the inhibition of histone release and nuclear condensation. Inhibition of nuclear opening also significantly affected enucleation. We further demonstrated this through a caspase-3 and 7 double knockout mouse model, which showed significant defects in nuclear opening and condensation with a compromise of enucleation in fetal erythroid progenitors. However, loss of these effector caspases had minimal effects on the red cell indices and survival of the recipient animals in a fetal liver cell transplantation model. Overall, these results indicate that nuclear opening and histone release may not be necessary for chromatin condensation and global transcriptome but are critical for nuclear condensation and efficient enucleation. These data also underline the robustness of enucleation despite the dysplastic or less condensed nucleus.
2022-12-16 | GSE185468 | GEO
Project description:Mammalian terminal erythropoiesis involves chromatin and nuclear condensation followed by enucleation. Late-stage erythroblasts undergo caspase-mediated nuclear opening formation that is important for nuclear condensation through partial release of histones. It remains unknown whether nuclear opening and histone release influence the three-dimensional (3D) genomic organization during terminal erythropoiesis. Here, we compared the genome wide 3D organization, chromatin accessibility, and transcriptome of the cultured mouse erythroid progenitors with and without the blocking of nuclear opening during differentiation. We found that terminal differentiation from the basophilic to orthochromatic stages of erythroblasts involves compaction and establishment of long-range interactions of the heterochromatin regions, which is associated with globally increased accessibility and upregulation of erythroid-related genes. Surprisingly, blocking of nuclear opening did not have a significant impact on 3D genomic organization, chromatin accessibility, or transcriptome despite the inhibition of histone release and nuclear condensation. Inhibition of nuclear opening also significantly affected enucleation. We further demonstrated this through a caspase-3 and 7 double knockout mouse model, which showed significant defects in nuclear opening and condensation with a compromise of enucleation in fetal erythroid progenitors. However, loss of these effector caspases had minimal effects on the red cell indices and survival of the recipient animals in a fetal liver cell transplantation model. Overall, these results indicate that nuclear opening and histone release may not be necessary for chromatin condensation and global transcriptome but are critical for nuclear condensation and efficient enucleation. These data also underline the robustness of enucleation despite the dysplastic or less condensed nucleus.
2022-12-16 | GSE184974 | GEO
Project description:In malaria infection, Plasmodium spp. parasites accumulate in the bone marrow near sites of erythroid development. While it has been observed that Plasmodium falciparum infection of late-stage erythroblasts can delay terminal erythroid differentiation and enucleation, the mechanism(s) underlying this phenomenon are unknown. Here, we apply RNA-seq after fluorescence-activated cell sorting (FACS) of infected erythroblasts to identify transcriptional responses to direct and indirect interaction with P. falciparum.
2023-07-25 | GSE233739 | GEO
Project description:Tropomodulins (Tmods) cap the pointed ends of actin filaments in erythroid and nonerythoid cell types. Targeted deletion of mouse Tmod3 leads to embryonic lethality at E14.5-E18.5, with anemia due to defects in definitive erythropoiesis in the fetal liver. BFU-E and CFU-E colony numbers are greatly reduced, indicating defects in progenitor populations. Flow-cytometry of fetal liver erythroblasts shows late stage populations are also decreased, including reduced percentages of enucleated cells. AnnexinV staining indicates increased apoptosis of Tmod3-/- erythroblasts, and cell cycle analysis reveals that there are more Ter119hi cells in S-phase in Tmod3-/- embryos. Notably, enucleating Tmod3-/- erythroblasts are still in the process of proliferation, suggesting impaired cell cycle exit during terminal differentiation. Tmod3-/- late erythroblasts often exhibit multi-lobular nuclear morphologies and aberrant F-actin assembly during enucleation. Furthermore, native erythroblastic island formation was impaired in Tmod3-/- fetal livers, with Tmod3 required in both erythroblasts and macrophages. In conclusion, disruption of Tmod3 leads to impaired definitive erythropoiesis, due to reduced progenitors, impaired erythroblastic island formation, and defective erythroblast cell cycle progression and enucleation. Tmod3-mediated actin remodeling may be required for erythroblast-macrophage adhesion, coordination of cell cycle with differentiation, and F-actin assembly and remodeling during erythroblast enucleation. Total RNAs from Tmod3+/+ and Tmod3-/- fetal livers at E14.5 were extracted and prepared for microarray analysis using the MoGene-1_0-st-v1 Affymetrix chip in the Scripps Research Microarray Core Facility. Each experiment was repeated with three independent embryos.
2013-10-31 | E-GEOD-51960 | biostudies-arrayexpress
Project description:Histone acetyltransferases (HATs) and deacetylases (HDACs) function antagonistically to control histone acetylation. As acetylation is a histone mark for active transcription, HATs have been associated with active and HDACs with inactive genes. We describe here genome-wide mapping of HATs and HDACs binding on chromatin and find that both are found at active genes with acetylated histones. Our data provide evidence that HATs and HDACs are both targeted to transcribed regions of active genes by phosphorylated RNA Pol II. Furthermore, the majority of HDACs in the human genome function to reset chromatin by removing acetylation at active genes. Inactive genes that are primed by MLL-mediated histone H3K4 methylation are subject to a dynamic cycle of acetylation and deacetylation by transient HAT/HDAC binding, preventing Pol II from binding to these genes but poising them for future activation. Silent genes without any H3K4 methylation signal show no evidence of being bound by HDACs. high throughput sequencing: genome-wide analysis of 5 HATs, 4 HDACs in human CD4+ cells, Tip60 and HDAC6 in activated CD4 cells, genome-wide analysis of 2 histone acetylations and RNA Polymerase II after HDAC inhibitor treatment in CD4, histone modification with WDR5 knock-down and HDAC inhibitor treatment in HeLa cells expression profiling: Global change in gene expression in human CD4+ T cells after HDAC inhibitor treatment for 2hours and 12 hours. (9 samples in total)
2009-08-20 | E-GEOD-15735 | biostudies-arrayexpress
Project description:Unlike class I Histone deacetylase (HDAC) members (HDAC1, 2, 3, etc.), HDAC5, a class IIa HDAC member, is downregulated in multiple solid tumors, including pancreatic cancer, and its loss is associated with unfavorable prognosis. Additionally, HDAC5’s expression correlates negatively with arachidonic acid (AA) metabolism, which is highly implicated in inflammatory responses and cancer progression. This study aimed to elucidate the role of HDAC5 in AA metabolism and its prospect in the treatment of pancreatic cancer.
2023-08-01 | GSE207863 | GEO
Project description:Aberrant expression of histone deacetylases (HDACs) and their activity are associated with a broad range of tumor development. However, based on cell or tissue types, class IIA HDACs such as HDAC4 and HDAC5 may facilitate or inhibit cancer progression. The goal of this project is to examine the overall proteome changes caused by HDAC5 expression. Here, we studied the effects of stable expression of HDAC5 (that is normally downregulated or have a weak basal expression) in four urothelial carcinoma (UC) cell lines (RT112, VM-Cub-1, SW1710, and UM-UC-3) by mass spectrometry in comparison to their vector controls. We observed that HDAC5 expression in VM-Cub-1 triggered a drastic phenotype change from an epitheloid to a mesenchymal (i.e., epithelial-mesenchymal transition, EMT) and altogether diminished cell proliferation of the other three cell lines. Our mass-spec data are in line with the phenotypic transformation of VM-Cub-1. In addition, we also performed a protein expression profiling of HBLAK, a spontaneously immortalized from primary human bladder epithelial cells that can be directly compared with the four UC vector cells. HBLAK vector cells only were included for mass-spec as the cells failed to express HDAC5 after lentiviral transduction and selection.
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