title: Lack of effect of LTB4 on human natural killer cell activity and T lymphocyte transformation.
abstract: Human natural killer (NK) cell activity was not significantly affected by leukotriene (LT) B4 over a wide concentration range (10(-6)-10(-14) M), whether added directly to the NK cell assay or after preincubation of effector cells for 2 h with the drug before addition of Cr labelled K562 target cells. In addition, LTB4 did not affect the kinetics of NK cell mediated cytotoxicity. Addition of LTB4 (10(-6)-10(-10) M) to concanavalin A (Con A) or phytohaemagglutinin (PHA)-stimulated human peripheral blood mononuclear cells (PBMC) had no significant effect on proliferation measured by tritiated thymidine incorporation, using both optimal and sub-optimal mitogen concentrations. Whilst it is clear that LTB4 is an important mediator of inflammation involving polymorphonuclear (PMN) leukocytes in vivo, it does not affect NK cell or T cell function in vitro.
authors.forename: T J
authors.initials: TJ
authors.lastname: Hall
authors.forename: J
authors.initials: J
authors.lastname: Brostoff
mesh_terms: D006801:Humans; D066298:In Vitro Techniques; D007694:Killer Cells, Natural / Q000187:drug effects* / Q000276:immunology; D007975:Leukotriene B4 / Q000494:pharmacology*; D008213:Lymphocyte Activation / Q000187:drug effects; D008934:Mitogens / Q000494:pharmacology; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology
chemical_list: D008934:Mitogens; D007975:Leukotriene B4