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Immunomodulatory Effects of Interferons on Target Human Gliosarcoma Cells in the Tumor:specific CTL and LAK mediated Cytolysis Shin-ichi MIYATAKE 1 , Seiji KONDOU 1 , Tomokazu AOKI 1 , Kouichi IWASAKI 2 , Kenji OHYAMA 1 , Shin-ichi OOTSUKA 2 , Yoshifumi ODA 1 , Haruhiko KIKUCHI 1 1Department of Neurosurgery, Faculty of Medicine, Kyoto University 2Department of Neurosurgery, Kitano Hospital Keyword: CTL , Immunomodulation , Interferon , LAK pp.1053-1059
Published Date 1991/11/10
DOI https://doi.org/10.11477/mf.1436900352
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Abstract

We compared the regulatory effects of interferon (IFN) - β and IFN- γ on the susceptibility of a human gliosarcoma line GI-1 to the attack of autologous cloned tumor-specific cytotoxic T-lymphocytes (CTL) and lymphokine-activated killer (LAK) cells. Preincu-bation of GI-1 cells with IFN- γ caused augmented sus-ceptibility to the cytotoxic attack of two autologous CTL clones, whereas IFN- β exhibited no such marked effect. On the other hand, preincubation with either IFN- β or IFN- γ made the GI-1 cells resistant to the attack of autologous LAK cells. Both IFNs augmented the surface expression of HLA class-I molecules on GI-1 cells. A monoclonal anti-HLA class-I antibody block-ed the cytolysis by one CTL clone, but not by the other one. These results suggest that IFN- γ exerts some different effect (s) from that of IFN- β on the target GI-1 cells in their susceptibility to the CTL-mediated cytolysis, and that recognition mechanisms of target cells by the CTL are different from those by. LAK cells. This draws our attention to IFN administration in adoptive immunotherapy against brain tumors using CTLs and LAK cells.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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