title: Synergy between the pre-T cell receptor and Notch: cementing the alphabeta lineage choice.
abstract: Notch1 signaling suppresses B cell development and promotes T lineage commitment in thymus-seeding hematopoietic progenitors. Notch1 is also activated in early T cell progenitors, but the functions of these later Notch signals have not been clearly defined. Recent studies reveal that Notch signaling is not essential for pre-T cell receptor (TCR) expression or gammadelta lineage choice. Rather, pre-TCR signaling enhances progenitor competitiveness for limiting Notch ligands, leading to preferential expansion of TCRbeta-bearing progenitors.
authors.affiliation: Program in Developmental Biology, Hospital for Sick Children Research Institute, and Department of Immunology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5G 1L7. Cynthia.guidos@sickkids.ca
authors.forename: Cynthia J
authors.initials: CJ
authors.lastname: Guidos
mesh_terms: D002454:Cell Differentiation / Q000276:immunology*; D019070:Cell Lineage / Q000276:immunology*; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D006801:Humans; D018448:Models, Immunological; D051881:Receptor, Notch1 / Q000276:immunology / Q000378:metabolism*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000378:metabolism*; D015398:Signal Transduction / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D051881:Receptor, Notch1; D016693:Receptors, Antigen, T-Cell, alpha-beta