title: Increased susceptibility of IFN-gamma-treated neuroblastoma cells to lysis by lymphokine-activated killer cells: participation of ICAM-1 induction on target cells.
abstract: We have investigated the effect of interferon-gamma (IFN-gamma) treatment of neuroblastoma cells on the susceptibility to lysis by lymphokine-activated killer (LAK) cells and examined the participation of cell-adhesion molecules on the target cells in LAK cell lysis. Untreated neuroblastoma cells expressed lymphocyte-function-associated antigen 3 (LFA-3) and neural-cell-adhesion molecule (NCAM), but did not express MHC-class-I, MHC-class-II, or intercellular-adhesion molecule I (ICAM-I). IFN-gamma treatment of neuroblastoma cells induced the expression of MHC-class-I and ICAM-I antigens, but did not affect the expression of MHC-class-II, LFA-3, and NCAM. This was accompanied by an increased susceptibility to lysis by LAK cells. Anti-ICAM-I antibody inhibited partially the increased sensitivity of IFN-gamma-treated neuroblastoma cells to LAK cell lysis, and blocked completely the increase in binding of LAK cells observed after IFN-gamma treatment of the target cells. These results suggest that the increased LAK sensitivity of IFN-gamma-treated neuroblastoma cells is partially attributable to the induction of ICAM-I on neuroblastoma cells and indicate that post-binding events also play a role in the increased sensitivity to LAK cell lysis observed after IFN-gamma treatment.
authors.affiliation: Department of Immunology, Karolinska Institute, Stockholm, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Naganuma
authors.forename: R
authors.initials: R
authors.lastname: Kiessling
authors.forename: M
authors.initials: M
authors.lastname: Patarroyo
authors.forename: M
authors.initials: M
authors.lastname: Hansson
authors.forename: R
authors.initials: R
authors.lastname: Handgretinger
authors.forename: A
authors.initials: A
authors.lastname: Grönberg
mesh_terms: D015815:Cell Adhesion Molecules / Q000502:physiology*; D003602:Cytotoxicity, Immunologic / Q000187:drug effects*; D005434:Flow Cytometry; D015395:Histocompatibility Antigens Class I / Q000032:analysis; D006801:Humans; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma / Q000494:pharmacology*; D015979:Killer Cells, Lymphokine-Activated / Q000276:immunology* / Q000378:metabolism; D009447:Neuroblastoma / Q000473:pathology; D014407:Tumor Cells, Cultured
chemical_list: D015815:Cell Adhesion Molecules; D015395:Histocompatibility Antigens Class I; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma