title: Inhibition of human NK cell and LAK cell cytotoxicity and differentiation by PGE2.
abstract: Activation of natural killer (NK) activity K562 target cells from nonadherent (NA) lymphocytes by interleukin 2 (IL-2) was inhibited marginally PGE2 (30-3000 nM). PGE2 did not effectively suppress the NK activity of IL-2-activated cells. The NK activation and acquisition of resistance to PGE2-mediated suppression of NK activity were dependent on protein synthesis. When NA cells were incubated with IL-2 for 3 or more days to generate lymphokine-activated killer (LAK) activity against Raji target cells, PGE2 only partially inhibited the activation of NK/LAK activity by an optimal dose of IL-2 (10 U/ml). The activation of NK/LAK activity by a suboptimal dose of IL-2 (0.1 U/ml) was inhibited by PGE2. When the NK/LAK activity of IL-2-activated cells was assessed in the presence or absence of PGE2, the LAK activity was more sensitive than the NK activity to PGE2-mediated suppression.
authors.affiliation: E. I. du Pont de Nemours and Co., Medical Products Department, Glenolden, Pennsylvania 19036.
authors.forename: K H
authors.initials: KH
authors.lastname: Leung
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic / Q000187:drug effects*; D015232:Dinoprostone / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000494:pharmacology; D007376:Interleukin-2 / Q000494:pharmacology; D015979:Killer Cells, Lymphokine-Activated / Q000187:drug effects* / Q000276:immunology; D007694:Killer Cells, Natural / Q000187:drug effects* / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects
chemical_list: D007376:Interleukin-2; D007371:Interferon-gamma; D015232:Dinoprostone