{"database":"GEO","file_versions":[{"headers":{"Content-Type":["application/json"]},"body":{"files":{"Other":["ftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE326nnn/GSE326921/"]},"type":"primary"},"statusCode":"OK","statusCodeValue":200}],"scores":null,"additional":{"omics_type":["Transcriptomics"],"species":["Mus musculus"],"gds_type":[" Genome binding/occupancy profiling by high throughput sequencing","Expression profiling by high throughput sequencing"],"full_dataset_link":["https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE326921"],"repository":["GEO"],"entry_type":["GSE"],"additional_accession":[]},"is_claimable":false,"name":"The chromatin assembly factor CHAF1b functions as an epigenetic amplifier of RORγt to promote Th17 pathogenicity and autoimmunity","description":"Th17 cells are double-edged regulators of mucosal defense and autoimmune inflammation, yet the chromatin mechanisms distinguishing their pathogenic state remain elusive. Here, we identify CHAF1b, a core subunit of the chromatin assembly factor CAF-1 complex, as an essential epigenetic amplifier of RORgt-driven transcription in Th17 cells. CHAF1b expression is selectively induced during Th17 differentiation and elevated in inflamed tissues from mice with experimental autoimmune encephalomyelitis (EAE) and colitis. Th17-specific deletion of Chaf1b markedly reduces IL-17A/F expression, alleviates neuroinflammation and colonic pathology, and reprograms the Th17 effector transcriptome without affecting lineage commitment. Mechanistically, CHAF1b physically associates with RORgt and co-occupies enhancer regions at the Il17a–Il17f locus, promoting chromatin accessibility and enhancer activation. Multi-omics analyses reveal that CHAF1b reinforces RORgt-driven enhancer–promoter interactions and maintains a proinflammatory Th17 epigenome. In human Th17 cells, CHAF1b similarly governs IL-17 production, and its expression declines in patients with inflammatory bowel disease following effective therapy. Collectively, these findings uncover CHAF1b as a chromatin-anchored signal amplifier that couples RORgt activity to autoimmune inflammation, highlighting its potential as a therapeutic target for Th17-mediated disorders.","dates":{"publication":"2026/04/08"},"accession":"GSE326921","cross_references":{"GSM":["GSM9643609","GSM9643607","GSM9643608","GSM9643616","GSM9643605","GSM9643606","GSM9643614","GSM9643615","GSM9643604","GSM9643612","GSM9643613","GSM9643610","GSM9643611"],"GPL":["34290"],"GSE":["326921"],"taxon":["Mus musculus"]}}