title: Effects of tumour necrosis factor-alpha (TNF-alpha), IL-1 beta and monocytes on lymphokine-activated killer (LAK) induction from natural killer (NK) cells and T lymphocytes.
abstract: Roles of monocytes and cytokines were investigated on LAK induction from T and NK cells. Monocytes augmented more T-LAK induction than did NK-LAK. Expression of IL-1 beta, TNF-alpha and interferon-gamma (IFN-gamma)-mRNA and their cytokine production were superior in NK cells compared with T cells in parallel with their LAK activities. An increase of TNF-alpha, IL-1 beta and IFN-gamma production was induced by co-culturing NK or T cells with autologous monocytes. The augmentation of T cell cytokine production and T-LAK activity by monocytes was more prominent than that of NK cells. TNF-alpha and IL-1 beta were generated 24 h after IL-2 stimulation, and these cytokines were able to almost substitute for monocytes in LAK induction. Conversely, LAK induction was almost completely suppressed by both anti-IL-1 beta and anti-TNF-alpha antibodies, if they were added within 24 h after the start of the LAK induction. IFN-gamma, which was produced at a later stage, scarcely affected LAK induction in spite of the cooperation with TNF-alpha. The results obtained indicate conclusively that the superiority of NK-LAK depends on their superior productivity of both IL-1 beta and TNF-alpha, and that the up-regulation of LAK induction by monocytes is largely due to the enhanced generation of both cytokines.
authors.affiliation: Department of Oral Surgery, Kochi Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yoneda
authors.forename: T
authors.initials: T
authors.lastname: Osaki
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: E
authors.initials: E
authors.lastname: Ueta
mesh_terms: D016207:Cytokines / Q000096:biosynthesis / Q000235:genetics / Q000494:pharmacology; D006801:Humans; D007375:Interleukin-1 / Q000502:physiology*; D015979:Killer Cells, Lymphokine-Activated / Q000187:drug effects / Q000502:physiology*; D007694:Killer Cells, Natural / Q000502:physiology*; D009000:Monocytes / Q000502:physiology*; D012333:RNA, Messenger / Q000032:analysis; D011994:Recombinant Proteins / Q000494:pharmacology; D013601:T-Lymphocytes / Q000502:physiology*; D014409:Tumor Necrosis Factor-alpha / Q000502:physiology*
chemical_list: D016207:Cytokines; D007375:Interleukin-1; D012333:RNA, Messenger; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha