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  • Title: [Augmentation of cytotoxicity of tumor infiltrating lymphocytes by interleukin-2 in gastric cancer patients].
    Author: Gotoh K.
    Journal: Nihon Geka Gakkai Zasshi; 1985 Dec; 86(12):1600-7. PubMed ID: 3878935.
    Abstract:
    Lymphocyte infiltration into tumor has been regarded as an expression of host reaction against tumor, but the natural cytotoxicity of tumor infiltrating lymphocytes (TLL) is often very low. In order to augment this low cytotoxicity, TIL of gastric cancer patients were cultured with interleukin-2 (IL-2) in vitro. On the other hand, immunopotentiators (OK432, PSK) were injected into gastric cancer intralesionally under endoscopy. By the in-vitro culture with IL-2, the cytotoxicity of TIL was augmented against both targets of K562 and MNN28 (gastric carcinoma cell line). In particular, the augmentation of cytotoxicity against MKN28 was more obvious in TLL than PBL (peripheral blood lymphocytes). In the ascitic lymphocytes, the in-vitro culture with IL-2 induced autologous tumor cell killing. Intralesional injection of OK432 or PSK augmented the natural cytotoxicity of TIL, and the ratio of OKT8 and Leu7 cells increased in the TIL of OK432-injected group.
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