title: B-1 B cell development.
abstract: CD5+ B cells have attracted considerable interest because of their association with self-reactivity, autoimmunity, and leukemia. In mice, CD5+ B cells are readily generated from fetal/neonatal precursors, but inefficiently from precursors in adult. One model proposed to explain this difference is that their production occurs through a distinctive developmental process, termed B-1, that enriches pre-B cells with novel germline VDJs and that requires positive selection of newly formed B cells by self-Ag. In contrast, follicular B cells are generated throughout adult life in a developmental process termed B-2, selecting VDJs that pair well with surrogate L chain, and whose maturation appears relatively independent of antigenic selection. In the present study, I focus on processes that shape the repertoire of mouse CD5+ B cells, describing the differences between B-1 and B-2 development, and propose a model encompassing both in the generation of functional B cell subpopulations.
authors.affiliation: Division of Basic Sciences, Fox Chase Cancer Center, Philadelphia, PA 19111, USA. rr_hardy@fccc.edu
authors.forename: Richard R
authors.initials: RR
authors.lastname: Hardy
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology* / Q000276:immunology*; D018956:CD5 Antigens / Q000276:immunology; D002454:Cell Differentiation / Q000276:immunology*; D019070:Cell Lineage / Q000276:immunology*; D006801:Humans; D008213:Lymphocyte Activation / Q000276:immunology; D018448:Models, Immunological
chemical_list: D018956:CD5 Antigens