Interferon-gamma induces a decrease in the susceptibility of human glioma cells to lysis by lymphokine-activated killer cells.
We studied the effect that treating two types of glioblastoma cell lines, U-87 MG and U-251 MG, with interferon (IFN)-gamma had on their susceptibility to lysis by lymphokine-activated killer (LAK) cells. We also examined the participation of cell-adhesion molecules and major histocompatibility complex (MHC) class I and II antigens present on the target cells in lysis by LAK cells. Treatment with IFN-gamma (1000 U/ml) for 48 hours resulted in the increased expression of both intercellular-adhesion molecule 1 and MHC class I antigens on tumor cells. In addition, untreated tumor cells expressed neural-cell-adhesion molecules and MHC class II antigens highly, but their expression was not affected by IFN-gamma treatment. These changes in expression were accompanied by a decreased susceptibility to lysis by LAK cells. Treatment with antisense-intercellular-adhesion molecule-1 oligonucleotide further inhibited LAK lysis of target cells, following treatment with IFN-gamma. In contrast, acid treatment of tumor cells after treatment with IFN-gamma increased their susceptibility to lysis by LAK cells. These findings suggest that treatment of glioblastoma cells with IFN-gamma decreased their susceptibility to lysis by LAK cells, and that this decrease in susceptibility is attributable principally to the increased expression of MHC class I antigen on target cells.
Yin
D
D
Department of Neurosurgery, Utano National Hospital, Kyoto, Japan.
Kondo
S
S
Takeuchi
J
J
Morimura
T
T
Nakatsu
S
S
Oda
Y
Y
Kikuchi
H
H
D001483:Base Sequence; D015816:Cell Adhesion Molecules, Neuronal / Q000032:analysis; D002460:Cell Line; D005909:Glioblastoma / Q000276:immunology*; D015395:Histocompatibility Antigens Class I / Q000032:analysis; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis; D007371:Interferon-gamma / Q000494:pharmacology*; D015979:Killer Cells, Lymphokine-Activated / Q000502:physiology*; D008969:Molecular Sequence Data; D014407:Tumor Cells, Cultured
D015816:Cell Adhesion Molecules, Neuronal; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma