Year: 2023
Type: preprint
Abstract: Expression of T Cell Factor-1 (TCF1), encoded by Tcf7, regulates lineage fate decisions during T cell development. Here we demonstrate that E-proteins control the threshold of TCF1 expression required for development of T cells. E-proteins bind to five elements (EPEs) in the Tcf7 locus. The third element, EPE3, interacts directly with Tcf7 promoter in Hi-ChIP analyses, suggesting it is an active enhancer. CRISPR-ablation of EPE3 reduces TCF1 protein expression in precursor thymocytes by 2-fold and dramatically impairs development of αβ and γδ T cells. Single cell gene expression analysis identified differentiation blocks at multiple CD4 - CD8 - stages and subsequent transition to CD4 + CD8 + stage. These data identify E-proteins and EPE3 as critical for the optimal TCF1 expression required for T cell development.
Language: English
Topic: T-cell and B-cell Immunology
Subfield: Immunology
Field: Immunology and Microbiology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W4388441715