title: Characterization of duck leucocytes by monoclonal antibodies.
abstract: cDNAs encoding CD3epsilon, CD4 and the alpha-chain of CD8 of ducks were cloned. Monoclonal antibodies against Pekin duck CD4 and CD8alpha revealed that the antigens were expressed by the majority of thymocytes and by subpopulations of CD3+ cells in peripheral tissues. CD8alpha cell surface expression was also found on 90% of bursal cells. The B cell specificity of a newly developed mab to the immunoglobulin light-chain (L-chain) was confirmed by double labelling studies with the chicken B-cell cytokine BAFF. Using these tools and a mab reacting with the cytoplasmic domain of CD3epsilon, we demonstrated that the CD8alpha molecule is expressed to high levels in CD3-positive T cells and at lower levels in CD3-negative bursal and peripheral B cells. Mab 2-4, which recognizes the chicken CD28 molecule, was found to react with CD4-positive duck lymphocytes and with CD8-positive duck T cells but not with CD8-positive B cells. Mab K1, which recognizes a common antigen on chicken thrombocytes and monocytes/macrophages, was found to react with duck thrombocytes and macrophages. Thus, a range of mabs is now available which will allow to phenotype the major leucocyte populations in ducks, a surrogate infection model for hepatitis B virus.
authors.affiliation: Institute for Animal Physiology, University of Munich, Veterinaerstrasse 13, D-80539 Munich, Germany.
authors.forename: Sonja
authors.initials: S
authors.lastname: Kothlow
authors.forename: Nina K
authors.initials: NK
authors.lastname: Mannes
authors.forename: Beatrice
authors.initials: B
authors.lastname: Schaerer
authors.forename: Dierk E
authors.initials: DE
authors.lastname: Rebeski
authors.forename: Bernd
authors.initials: B
authors.lastname: Kaspers
authors.forename: Ursula
authors.initials: U
authors.lastname: Schultz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D015703:Antigens, CD / Q000737:chemistry / Q000235:genetics / Q000276:immunology* / Q000378:metabolism*; D001402:B-Lymphocytes / Q000276:immunology / Q000378:metabolism; D015415:Biomarkers / Q000378:metabolism; D001792:Blood Platelets / Q000276:immunology / Q000378:metabolism; D002060:Bursa of Fabricius / Q000166:cytology / Q000276:immunology; D017252:CD3 Complex / Q000032:analysis / Q000235:genetics / Q000276:immunology; D015704:CD4 Antigens / Q000032:analysis / Q000235:genetics / Q000276:immunology; D016827:CD8 Antigens / Q000032:analysis / Q000235:genetics / Q000276:immunology; D002454:Cell Differentiation; D003001:Cloning, Molecular; D003429:Cross Reactions; D004372:Ducks / Q000276:immunology*; D006801:Humans; D016130:Immunophenotyping; D007962:Leukocytes / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*; D008264:Macrophages / Q000276:immunology / Q000378:metabolism; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D015415:Biomarkers; D017252:CD3 Complex; D015704:CD4 Antigens; D016827:CD8 Antigens