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Epigenetic and transcriptional regulation of dendritic cell development and anti-tumor function by HDAC1 (ATAC-Seq)

ABSTRACT: DC progenitors adapt their transcriptional program during development generating different subsets. How chromatin modifications modulate these processes is unclear. Here we investigate the impact of histone deacetylation on DCs by genetically deleting HDAC1 or HDAC2 in hematopoietic progenitors and CD11c-expressing cells. While HDAC2 isn’t critical for DC development, HDAC1 deletion impairs pro- and mature pDC generation and affects ESAM+cDC2 differentiation from tDC and pre-cDC2, whereas cDC1s are unchanged. HDAC1 knock-down in human hematopoietic cells also impairs cDC2 development highlighting its crucial role across species. Multi-omics analyses reveal that HDAC1 controls expression, chromatin accessibility and histone-acetylation of the transcription factors IRF4, IRF8 and SPIB required for efficient development of cDC2 subsets. Without HDAC1, DCs switch immunologically enhancing tumor surveillance through increased cDC1 maturation and IL-12 production driving Th1-mediated immunity and CD8+T-cell recruitment. Our study reveals the importance of histone-acetylation in DC development and anti-tumor immunity suggesting DC-targeted therapeutic strategies for immuno-oncology.

ORGANISM(S): Mus musculus

PROVIDER: GSE266581 | GEO | 2024/05/30

REPOSITORIES: GEO

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Epigenetic and transcriptional regulation of dendritic cell development and anti-tumor function by HDAC1 (RNA-Seq)

Project description:DC progenitors adapt their transcriptional program during development generating different subsets. How chromatin modifications modulate these processes is unclear. Here we investigate the impact of histone deacetylation on DCs by genetically deleting HDAC1 or HDAC2 in hematopoietic progenitors and CD11c-expressing cells. While HDAC2 isn’t critical for DC development, HDAC1 deletion impairs pro- and mature pDC generation and affects ESAM+cDC2 differentiation from tDC and pre-cDC2, whereas cDC1s are unchanged. HDAC1 knock-down in human hematopoietic cells also impairs cDC2 development highlighting its crucial role across species. Multi-omics analyses reveal that HDAC1 controls expression, chromatin accessibility and histone-acetylation of the transcription factors IRF4, IRF8 and SPIB required for efficient development of cDC2 subsets. Without HDAC1, DCs switch immunologically enhancing tumor surveillance through increased cDC1 maturation and IL-12 production driving Th1-mediated immunity and CD8+T-cell recruitment. Our study reveals the importance of histone-acetylation in DC development and anti-tumor immunity suggesting DC-targeted therapeutic strategies for immuno-oncology.

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Epigenetic and transcriptional regulation of dendritic cell development and anti-tumor function by HDAC1 (CUT&RUN)

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Expression data from intestine of HDAC1 and HDAC2 conditionally mutated mice

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Expression data from intestine of HDAC1 and HDAC2 conditionally mutated mice

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HDAC1/2 is indispensable for mouse and bovine ZGA via regulating distribution of H3K27ac and H3K4me3 [ChIP-seq]

Project description:Zygotic genome activation (ZGA) is an impressed biological event following fertilization during early embryo development. Precise reprogramming of epigenetic modifications (e.g. histone H3 lysine 27 acetylation, H3K27ac) have been found contribute to safeguard ZGA in zebrafish and Drosophila, but the dynamic of H3K27ac and the underlying regulation mechanism in mammal embryos are still enigmatic yet. As the main erasers for histone acetylation, histone deacetylase 1 and 2 (HDAC1 and HDAC2) are reported essential for mouse oogenesis and embryo lineage development, while it is unclear if they are functional for ZGA. Here, we observed significant global decrease of H3K27ac during ZGA in both mouse and bovine embryos, and accumulation of HDAC1/2 is responsible for the decline of H3K27ac. Repression of HDAC1/2 by dominant negative mutation led to arrested development at late 2-cell stage in mouse embryos, accompanied by downregulation of genes supposed to be expressed during ZGA. ChIP-seq revealed abnormal distribution of H3K27ac, and DUX participates in H3K27ac aberrant hyper-acetylation in embryos overexpressed mutant HDAC1/2. Moreover, suppression of HDAC1/2 also restrains H3K4me3 removal at gene body regions via impeding expression of KDM5s during mouse ZGA, and compensatory exogenous Kdm5b mRNA can fix the exceeding H3K4me3 and failed ZGA. Intriguingly, function of HDAC1/2 seems to be conservative between mouse and bovine embryos. Together, this study reveals that HDAC1/2 is indispensable for mouse and bovine ZGA via regulating distribution of H3K27ac and H3K4me3.

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Project description:The aim of our study is to determine the functions of histone deacetylases (HDACs) 1 and 2 in Schwann cells during postnatal development of the peripheral nervous system (PNS). Schwann cells are the myelinating glial cells of the PNS. At birth, mouse sciatic nerves mature in 2 subsequent phases: 1/ big caliber axons get sorted into a 1 to 1 relationship with Schwann cells, 2/ Schwann cells build a myelin sheath around sorted axons. In mice where both HDAC1 & HDAC2 have been specifically knocked out in Schwann cells, both phases are impaired. HDACs are chromatin remodeling enzymes, they can thus alter gene expression directly. We want to identify which genes controlled by HDAC1 and HDAC2 in Schwann cells are necessary for the maturation of sciatic nerves. Because HDAC1 and HDAC2 can compensate for each other loss to some extend, we will first analyze changes of gene expression in HDAC1/HDAC2 double KO animals. We expect to gain critical insights into the molecular mechanisms controlling Schwann cell differentiation and myelination. This knowledge is of key importance for the success of regenerative medicine in peripheral neuropathies, nerve tumors, and transplantation paradigms in non-regenerative CNS lesions and in large PNS injuries. 3 double knockout mutants for HDAC1 and HDAC2 and 3 control littermates were analyzed. Tissues analyzed: sciatic nerves of 2 day-old mouse pups

2011-02-25 | E-GEOD-27451 | biostudies-arrayexpress

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