title: Monocyte-induced down-modulation of CD16 and CD56 antigens on human natural killer cells and its regulation by histamine H2-receptors.
abstract: Human natural killer (NK) cells carry CD16/FcR and CD56 cell-surface Ag but lack the T-cell marker CD3. Here we show that incubation of resting human NK cells with CD3-/16+/56+ phenotype with autologous monocytes induced the disappearance of CD16 and CD56 cell-surface Ag on NK-cells but did not affect CD2 or CD3 Ag expression on T-cells. Monocyte-induced down-modulation of NK-cell-surface Ag was cell-contact dependent and induced only by freshly isolated monocytes, recovered from peripheral blood by counter-current centrifugal elutriation. Adherence of monocytes abrogated the capacity to induce down-modulation of NK-cell-surface Ag. The biogenic amine histamine dose-dependently reversed the monocyte-induced down-modulation of CD16 and CD56 on CD3- NK-cells. The effect of histamine was mediated by H2-type receptors on monocytes. The data presented are suggestive of a cell-cell-mediated interaction between monocytes and NK-cells which modulates surface expression of NK-cell Ag and its histaminergic regulation.
authors.affiliation: Department of Clinical Virology, University of Göteborg, Sweden.
authors.forename: K
authors.initials: K
authors.lastname: Hellstrand
authors.forename: B
authors.initials: B
authors.lastname: Kjellson
authors.forename: S
authors.initials: S
authors.lastname: Hermodsson
mesh_terms: D000920:Antibody-Dependent Cell Cytotoxicity; D015703:Antigens, CD / Q000032:analysis*; D000943:Antigens, Differentiation / Q000032:analysis*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D017252:CD3 Complex; D019002:CD56 Antigen; D002450:Cell Communication; D015536:Down-Regulation; D006632:Histamine / Q000494:pharmacology; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology*; D009000:Monocytes / Q000502:physiology*; D011948:Receptors, Antigen, T-Cell / Q000032:analysis; D011961:Receptors, Fc / Q000032:analysis*; D011970:Receptors, Histamine H2 / Q000502:physiology*; D017452:Receptors, IgG
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D019002:CD56 Antigen; D011948:Receptors, Antigen, T-Cell; D011961:Receptors, Fc; D011970:Receptors, Histamine H2; D017452:Receptors, IgG; D006632:Histamine