title: CD36(+)-dendritic epidermal cells: a putative actor in the cutaneous immune system.
abstract: In the present study we have investigated by indirect immunofluorescence staining and mixed lymphocyte reaction methods, the localization, distribution, percentage, and the immunological involvement of CD36(+)-dendritic epidermal cells (CD36(+)-DECs) in normal human skin. Human epidermal cell suspensions were obtained from skin specimen of healthy persons. First, an indirect immunofluorescent staining method was performed on frozen skin sections, freshly isolated cells, nonadherent and adherent cells and second, the allogeneic mixed epidermal cell-lymphocyte reaction (ELR) method was performed with human peripheral blood mononuclear cells and irradiated CD36(+)-DECs plus CD-1a+ (Langerhans cells) and/ConA (at 10 micrograms/mL). We found that CD36(+)-DECs were localized in the epidermis mainly in the basal layer. They were non adherent cells. The percentage of these CD36(+)-DECs was of about 2%. These CD36(+)-DECs were AE3 (which recognizes keratin normally expressed by keratinocytes) positive cells. Our immunoreactivity study using allogeneic mixed ELR, showed that CD36(+)-DECs stimulated allogeneic lymphocyte proliferation. Their stimulatory effects were important when Langerhans cells and ConA were added separately or together to the PBMCs culture. The above results suggest that CD36(+)-DECs may contribute to the immunological role of skin and could be involved in cutaneous allograft recognition and rejection.
  
  
  BACKGROUND
  DECs: dendritic epidermal cells; ConA: concanavalin A; DPM: disintegrations per minute; ELR: epidermal cell-lymphocyte reaction; LC: Langerhans cells; PBMCs: peripheral blood mononuclear cells.
authors.affiliation: Laboratoire de Recherche des Grands Brûlés/LOEX, Hôpital du Saint-Sacrement, Québec, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Rouabhia
authors.forename: N
authors.initials: N
authors.lastname: Jobin
authors.forename: R
authors.initials: R
authors.lastname: Doucet
authors.forename: J
authors.initials: J
authors.lastname: Bergeron
authors.forename: F A
authors.initials: FA
authors.lastname: Auger
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000032:analysis*; D015415:Biomarkers / Q000032:analysis; D001706:Biopsy; D018955:CD36 Antigens; D002478:Cells, Cultured; D003208:Concanavalin A; D046508:Culture Techniques / Q000379:methods; D003713:Dendritic Cells / Q000166:cytology* / Q000276:immunology; D000078404:Epidermal Cells; D004817:Epidermis / Q000276:immunology; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D015603:Keratinocytes / Q000166:cytology; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000276:immunology; D016462:Mammaplasty; D016024:Receptors, Cytoadhesin / Q000032:analysis; D012867:Skin / Q000166:cytology* / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D015415:Biomarkers; D018955:CD36 Antigens; D016024:Receptors, Cytoadhesin; D003208:Concanavalin A