title: Human lymphocyte differentiation antigens HB-10 and HB-11. I. Ontogeny of antigen expression.
abstract: T, B, and NK cells appear to represent separate lymphocyte lineages, but indirect evidence suggests that they may be related via a common lymphoid precursor cell. We have produced two monoclonal antibodies, HB-10 (IgM) and HB-11 (IgG1), by fusing spleen cells from mice immunized with the human B cell line SB, and have shown that both antibodies react with lymphocyte-specific cell surface antigens present on T, B, and NK cells, but not on other types of blood cells. The antibodies were reactive with most cell lines and malignancies of B cell origin and with some of T and NK cell lineage. Although the populations of cells expressing these two antigens were virtually identical, the HB-10 and HB-11 antibodies identified separate protease-sensitive determinants on the cell surface. The HB-11 antigenic determinant was also sensitive to neuraminidase and periodate treatments, but the HB-10 determinant was not. Antigen expression by lymphocytes from fetal, newborn, and adult tissues was examined. Within the B cell lineage, these antigens were expressed by most pre-B cells in bone marrow (88% +/- 5) and almost all B cells, but were not expressed by mature plasma cells. Virtually all of the granular lymphocytes in blood marked by the Leu-7 and Leu-11 (anti-Fc receptor) antibodies were HB-10+ and 11+. Among T lineage cells, the HB-10 and 11 antigens were expressed by a subset of relatively mature T3+ thymocytes and by greater than 90% of the T cells in newborn blood. In adults, however, only 65% of blood T cells and 24 to 30% of splenic or tonsillar T cells expressed the HB-10 and HB-11 antigens. The postnatal emergence of T cells which, like plasma cells, do not express these antigens suggests that post-thymic T lymphocyte maturation occurs and may be an activation-dependent process.
authors.forename: T F
authors.initials: TF
authors.lastname: Tedder
authors.forename: L T
authors.initials: LT
authors.lastname: Clement
authors.forename: M D
authors.initials: MD
authors.lastname: Cooper
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal / Q000096:biosynthesis; D000937:Antigen-Antibody Reactions; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm / Q000032:analysis / Q000276:immunology; D000954:Antigens, Surface / Q000032:analysis* / Q000276:immunology; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology; D002454:Cell Differentiation; D002460:Cell Line; D006412:Hematopoietic Stem Cells / Q000276:immunology; D006801:Humans; D006825:Hybridomas / Q000378:metabolism; D007231:Infant, Newborn; D007938:Leukemia / Q000276:immunology; D008223:Lymphoma / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000145:classification / Q000166:cytology / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D000954:Antigens, Surface