title: A monoclonal antibody against a canine CD45 homologue: analysis of tissue distribution, biochemical properties and in vitro immunological activity.
abstract: This report describes the characterisation of a monoclonal antibody (mAb), AB6, which recognises specifically a cluster of canine leukocyte surface molecules. The immunogen used for obtaining the AB6 mAb was a lysate of canine peripheral blood mononuclear cells (PBMC). This novel mAb belongs to the IgG2a isotype, and reacted in Western blot with four different canine leukocyte glycoproteins with apparent molecular weights of 180, 190, 205 and 220 kDa. The AB6 mAb recognised the majority of canine peripheral blood leukocytes as determined by flow cytometry (97%). It also exhibited a broad reactivity pattern against lymphoid and myeloid cells, inhibited the proliferation of mitogen-stimulated canine PBMC and did not recognise human PBMC and murine splenocytes. The biochemical properties, cell and tissue specificity, and in vitro biological activity of the AB6 mAb indicate that it recognises a canine CD45 homologue. The mAb could become a valuable diagnostic and research tool for the evaluation of immune functions in dogs.
authors.affiliation: Laboratorio de Patologia e Bio-Intervenção, Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Bahia, Brazil. phpa@ufba.br
authors.forename: Paulo Henrique Palis
authors.initials: PH
authors.lastname: Aguiar
authors.forename: Stella Maria
authors.initials: SM
authors.lastname: Barrouin-Melo
authors.forename: Carlos Roberto
authors.initials: CR
authors.lastname: Franke
authors.forename: Roberto Robson Borges
authors.initials: RR
authors.lastname: dos Santos
authors.forename: Tânia Maria Correia
authors.initials: TM
authors.lastname: Silva
authors.forename: José O
authors.initials: JO
authors.lastname: Mengel
authors.forename: Washington Luis Conrado
authors.initials: WL
authors.lastname: dos-Santos
authors.forename: Lain
authors.initials: L
authors.lastname: Pontes-de-Carvalho
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000378:metabolism / Q000494:pharmacology; D049109:Cell Proliferation / Q000187:drug effects; D004285:Dogs; D017493:Leukocyte Common Antigens / Q000378:metabolism*; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism; D014018:Tissue Distribution
chemical_list: D000911:Antibodies, Monoclonal; D017493:Leukocyte Common Antigens