Autism-associated CHD8 controls reactive gliosis and neuroinflammation via remodeling chromatin in astrocytes [Microglia RNA-seq]
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PROVIDER: PRJNA1132698 | ENA |
REPOSITORIES: ENA
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Project description:Reactive changes of glial cells during neuroinflammation impact brain disorders and disease progression. Elucidating the mechanisms that control reactive gliosis may help understand brain pathophysiology and improve outcomes. Here, we report that adult ablation of the ASD-associated CHD8 in astrocytes attenuates reactive gliosis via remodeling chromatin accessibility, changing gene expression. Conditional Chd8 deletion in astrocytes, but not microglia, suppresses reactive gliosis by impeding astrocyte proliferation and morphological elaboration. Astrocyte Chd8 ablation alleviates lipopolysaccharide-induced neuroinflammation and septic-associated hypothermia in mice. Astrocytic CHD8 plays an important role in neuroinflammation by altering the chromatin landscape, regulating metabolic and lipid-associated pathways, and astrocyte-microglia crosstalk. Moreover, we show that reactive gliosis can be directly mitigated in vivo using an AAV-mediated Chd8 gene editing strategy. These findings uncover a role of ASD-associated CHD8 in the adult brain, which may warrant future exploration of targeting epigenetic pathways in reactive gliosis and neuroinflammation in injury and neurological diseases.
2024-07-09 | GSE271652 | GEO
Project description:Reactive changes of glial cells during neuroinflammation impact brain disorders and disease progression. Elucidating the mechanisms that control reactive gliosis may help understand brain pathophysiology and improve outcomes. Here, we report that adult ablation of the ASD-associated CHD8 in astrocytes attenuates reactive gliosis via remodeling chromatin accessibility, changing gene expression. Conditional Chd8 deletion in astrocytes, but not microglia, suppresses reactive gliosis by impeding astrocyte proliferation and morphological elaboration. Astrocyte Chd8 ablation alleviates lipopolysaccharide-induced neuroinflammation and septic-associated hypothermia in mice. Astrocytic CHD8 plays an important role in neuroinflammation by altering the chromatin landscape, regulating metabolic and lipid-associated pathways, and astrocyte-microglia crosstalk. Moreover, we show that reactive gliosis can be directly mitigated in vivo using an AAV-mediated Chd8 gene editing strategy. These findings uncover a role of ASD-associated CHD8 in the adult brain, which may warrant future exploration of targeting epigenetic pathways in reactive gliosis and neuroinflammation in injury and neurological diseases.
2024-07-09 | GSE271651 | GEO
Project description:Reactive changes of glial cells during neuroinflammation impact brain disorders and disease progression. Elucidating the mechanisms that control reactive gliosis may help understand brain pathophysiology and improve outcomes. Here, we report that adult ablation of the ASD-associated CHD8 in astrocytes attenuates reactive gliosis via remodeling chromatin accessibility, changing gene expression. Conditional Chd8 deletion in astrocytes, but not microglia, suppresses reactive gliosis by impeding astrocyte proliferation and morphological elaboration. Astrocyte Chd8 ablation alleviates lipopolysaccharide-induced neuroinflammation and septic-associated hypothermia in mice. Astrocytic CHD8 plays an important role in neuroinflammation by altering the chromatin landscape, regulating metabolic and lipid-associated pathways, and astrocyte-microglia crosstalk. Moreover, we show that reactive gliosis can be directly mitigated in vivo using an AAV-mediated Chd8 gene editing strategy. These findings uncover a role of ASD-associated CHD8 in the adult brain, which may warrant future exploration of targeting epigenetic pathways in reactive gliosis and neuroinflammation in injury and neurological diseases.
2024-07-09 | GSE271650 | GEO
Project description:Autism-associated CHD8 controls reactive gliosis and neuroinflammation via remodeling chromatin in astrocytes [ATAC-seq]
| PRJNA1132699 | ENA
Project description:Autism-associated CHD8 controls reactive gliosis and neuroinflammation via remodeling chromatin in astrocytes [bulk RNA-seq]
| PRJNA1132694 | ENA
Project description:Whole-exome sequencing studies have implicated chromatin modifiers and transcriptional regulators in autism spectrum disorder (ASD) through the identification of de novo loss of function mutations in affected individuals. Many of these genes are co-expressed in mid-fetal human cortex, suggesting ASD risk genes converge in regulatory networks that are perturbed in ASD during neurodevelopment. To elucidate such networks we mapped promoters and enhancers bound by the chromodomain helicase CHD8, which is strongly enriched in ASD-associated de novo loss of function mutations, using ChIP-seq in mid-fetal human brain, human neural stem cells (hNSCs), and embryonic mouse cortex. We find that CHD8 targets are strongly enriched for ASD risk genes that converge in ASD-associated co-expression networks in human midfetal cortex. CHD8 knockdown in hNSCs results in significant dysregulation of ASD risk genes targeted by CHD8, as well as additional genes important for neurodevelopment, including members of the Wnt/M-NM-2-catenin signaling pathway. Integration of CHD8 binding data with genetic and gene co-expression data in ASD risk models provides support for additional ASD risk genes. Together, our results suggest that loss of CHD8 function contributes to ASD through regulatory perturbation of other ASD risk genes during human cortical development. Two biological replicates for each ChIP with appropriate Input control Four biological replicates for each condition in knockdown experiments (Ctrl construct, Chd8 target C, and Chd8 target G)
2015-01-21 | E-GEOD-57369 | biostudies-arrayexpress
Project description:Truncating mutations of CHD8, encoding a chromodomain helicase, and of many other genes with diverse functions, are strong-effect risk factors for autism spectrum disorder (ASD), suggesting multiple mechanisms of pathogenesis. We explored the transcriptional networks that CHD8 regulates in neural progenitor cells (NPCs) by reducing its expression and then integrating transcriptome sequencing (RNA-seq) with genome-wide CHD8 binding (ChIP-seq). Suppressing CHD8 to levels comparable with loss of a single allele caused altered expression of 1,756 genes, 64.9% of which were up-regulated. CHD8 showed widespread binding to chromatin, with 7,324 replicated sites that marked 5,658 genes. Integration of these data suggests that a limited array of direct regulatory effects of CHD8 produced a much larger network of secondary expression changes. Genes indirectly down-regulated (i.e., without CHD8 binding sites) reflect pathways involved in brain development, including synapse formation, neuron differentiation, cell adhesion, and axon guidance, whereas CHD8-bound genes are strongly associated with chromatin modification and transcriptional regulation. Genes associated with ASD were strongly enriched among indirectly down-regulated loci (p = 1.01x10-9) and CHD8-bound genes (p = 4.34x10-3), which align with previously identified co-expression modules during fetal development. We also find an intriguing enrichment of cancer related gene-sets among CHD8-bound genes (p < 1.9x10-11). In vivo suppression of chd8 in zebrafish produced macrocephaly comparable to that of humans with inactivating mutations. These data indicate that heterozygous disruption of CHD8 precipitates a network of gene expression changes involved in neurodevelopmental pathways in which many ASD-associated genes may converge on shared mechanisms of pathogenesis. RNA-seq in NPCs treated with shRNAs targeting CHD8. For controls, NPCs were treated with shRNAs targeting GFP and LacZ. Infection and sequencing was carried out in two separate batches, with one GFP and one LacZ sample in each batch. All samples were sequenced in two technical replicates.
2014-10-07 | E-GEOD-61491 | biostudies-arrayexpress
Project description:The loss-of-function mutations in the chromatin remodeler CHD8, a high-risk factor in autism spectrum disorder (ASD), lead to severe developmental delay, however, the underlying mechanisms remains elusive. Here, we use transcriptome and genomic occupancy reveal that CHD8 regulates chromatin accessibility and activates neurogenesis-related genes for cortical neurogenesis.
2022-10-17 | GSE148608 | GEO
Project description:Chromodomain helicase DNA-binding 8 (CHD8) is one of the most frequently mutated genes causative of autism spectrum disorder (ASD). While its phenotypic spectrum often encompasses macrocephaly and hence implicates cortical abnormalities in this form of ASD, the neurodevelopmental impact of human CHD8 haploinsufficiency remains unexplored. Here we combined human cerebral organoids and single cell transcriptomics to define the effect of ASD-linked CHD8 mutations on human cortical development. We found that CHD8 haploinsufficiency causes a major disruption of neurodevelopmental trajectories with an accelerated generation of inhibitory neurons and a delayed production of excitatory neurons alongside the ensuing protraction of the proliferation phase. This imbalance may contribute to the significant enlargement of cerebral organoids in line with the macrocephaly observed in patients with CHD8 mutations. By adopting an isogenic design of patient-specific mutations and mosaic cerebral organoids, we define genotype-phenotype relationships and uncover their cell-autonomous nature. Finally, our results assign different CHD8-dependent molecular defects to particular cell types, pointing to an abnormal and extended program of proliferation and alternative splicing specifically affected in, respectively, the radial glial and immature neuronal compartments. By identifying temporally restricted cell-type specific effects of human CHD8 mutations, our study uncovers developmental alterations as reproducible endophenotypes for neurodevelopmental disease modelling.
2024-01-27 | E-MTAB-11406 | biostudies-arrayexpress
Project description:Autism Spectrum Disorders includes several behavioral phenotypes in addition to other comorbid conditions. One of the strongest comorbidities in Autism is gastrointestinal issues. Gastrointestinal issues are also prevalent in individuals with mutations in CHD8, which is one of the top autism-related genes. However, the relationship between autism related genes, such as CHD8, gastrointestinal function, and autism related behaviors are yet very unclear. In this study our goal is to explore the molecular mechanism and connection between CHD8 KO and gastrointestinal problems.
2021-08-29 | GSE182815 | GEO