title: TNF alpha enhancement of NK and LAK cell functions induced by high-dose IL-2 in human peripheral blood mononuclear cells from patients pretreated with alpha IFN + IL-2.
abstract: In this study we analyzed the induction of NK and LAK cell functions by TNF alpha, alone or combined with IL-2, in 4 days in vitro culture of PBMC from patients treated with alpha IFN + IL-2. Although the MN cell recovery after 4 days culture was very similar with TNF alpha alone or with IL-2 alone, TNF alpha did not maintain nor induce LAK or NK activities of in vivo preactivated PBMC. When compared to preculture values, TNF alpha alone induced a preferential outgrowth of CD4+ T cells together with a decrease of CD8+ T cells, NK cells and IL-2R (p55)-expressing cells. The combination of TNF alpha (100 ng) and high dose IL-2 (9,000 IUg/ml) did not improve the MN cell recovery after 4 days culture; but increased IL-2-induced NK activities in PBMC from 6/7 patients, and IL-2-induced LAK activities in 4/7 patients. However, these variations were not significant. The combination of TNF alpha and lower doses of IL-2, ranging from 150 IU/ml to 30 IU/ml, did not modify MN cell recovery in culture nor IL-2-induced NK and LAK cell activities. When compared to paired samples cultured with IL-2 alone, the combination of TNF alpha with all doses of IL-2 did not modify the distribution of T and NK cells, but increased the expression of CD8 on NK cells. Furthermore, the combination of TNF alpha and IL-2 increased the expression of IL-2R (p55) on PBMC but the expression of this receptor was restricted to CD4+ T cells and did not appear on NK cells.
authors.affiliation: Centre Léon Bérard, Lyon, France.
authors.forename: M
authors.initials: M
authors.lastname: Favrot
authors.forename: V
authors.initials: V
authors.lastname: Combaret
authors.forename: J Y
authors.initials: JY
authors.lastname: Blay
authors.forename: R
authors.initials: R
authors.lastname: Capdeville
authors.forename: D C
authors.initials: DC
authors.lastname: Zhou
authors.forename: G
authors.initials: G
authors.lastname: Clapisson
authors.forename: S
authors.initials: S
authors.lastname: Chouaib
authors.forename: C R
authors.initials: CR
authors.lastname: Franks
authors.forename: T
authors.initials: T
authors.lastname: Philip
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D002292:Carcinoma, Renal Cell / Q000276:immunology* / Q000628:therapy; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D006801:Humans; D007111:Immunity, Cellular / Q000187:drug effects; D007155:Immunologic Factors / Q000627:therapeutic use; D007376:Interleukin-2 / Q000494:pharmacology* / Q000627:therapeutic use; D007680:Kidney Neoplasms / Q000276:immunology* / Q000628:therapy; D015979:Killer Cells, Lymphokine-Activated / Q000187:drug effects*; D007694:Killer Cells, Natural / Q000187:drug effects*; D007963:Leukocytes, Mononuclear / Q000187:drug effects* / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects; D011994:Recombinant Proteins / Q000494:pharmacology / Q000627:therapeutic use; D016176:T-Lymphocyte Subsets / Q000187:drug effects / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D015703:Antigens, CD; D007155:Immunologic Factors; D007376:Interleukin-2; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha