title: CD86 molecule is a specific marker for canine monocyte-derived dendritic cells.
abstract: In this study, canine monocyte-derived dendritic cells (cMo-DC) were produced in presence of canine GM-CSF (cGM-CSF) and canine IL-4 (cIL-4), and they were characterized by their dendritic morphology, MLR functionality and phenotype. We noticed that cMo-DC were labelled with three anti-human CD86 (FUN-1, BU63 and IT2.2 clones), whereas resting and activated lymphocytes or monocytes were not stained. CD86 expression was induced by cIL-4 and was up-regulated during the differentiation of the cMo-DC, with a maximum at day 7. Furthermore, cMo-DC were very potent even in low numbers as stimulator cells in allogeneic MLR, and BU63 mAb was able to completely block the cMo-DC-induced proliferation in MLR. We also observed that cMo-DC highly expressed MHC Class II and CD32, but we failed to determine their maturation state since the lack of commercially available canine markers. Moreover, cMo-DC contained cytoplasmic periodic microstructures, potentially new ultrastructural markers of canine DC recently described. In conclusion, this work demonstrates that the CD86 costimulatory marker is now usable for a better characterization of in vitro canine DC.
authors.affiliation: Immunology Department, Etablissement Français du Sang de Lyon,1-3 Rue du Vercors, 69007 Lyon, France. c.bonnefont@vet-lyon.fr
authors.forename: Catherine
authors.initials: C
authors.lastname: Bonnefont-Rebeix
authors.forename: Camila Miranda
authors.initials: CM
authors.lastname: de Carvalho
authors.forename: Janine
authors.initials: J
authors.lastname: Bernaud
authors.forename: Luc
authors.initials: L
authors.lastname: Chabanne
authors.forename: Thierry
authors.initials: T
authors.lastname: Marchal
authors.forename: Dominique
authors.initials: D
authors.lastname: Rigal
mesh_terms: D000818:Animals; D051940:B7-2 Antigen / Q000276:immunology*; D015415:Biomarkers; D049109:Cell Proliferation; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology*; D004285:Dogs / Q000276:immunology*; D005260:Female; D005434:Flow Cytometry / Q000662:veterinary; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D015847:Interleukin-4 / Q000276:immunology; D007700:Kinetics; D008213:Lymphocyte Activation / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed / Q000662:veterinary; D008297:Male; D009000:Monocytes / Q000166:cytology / Q000276:immunology*
chemical_list: D051940:B7-2 Antigen; D015415:Biomarkers; C497964:CD86 protein, human; D000949:Histocompatibility Antigens Class II; D015847:Interleukin-4; D016178:Granulocyte-Macrophage Colony-Stimulating Factor