J.Jpn. Surg. Soc.. 91(4): 515-523, 1990

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Original article

CYTOTOXICITY OF LYMPHOCYTES SENSITIZED BY AUTOLOGOUS TUMOR CELLS IN VITRO, AGAINST AUTOLOGOUS LUNG CANCER CELL LINES

In order to obtain killer lymphocytes that would have a strong cytotoxicity against autologous tumor cells, we conducted a cytotoxic assay of effector cells cultured from human peripheral blood lymphocytes (PBL) using 10 cultured lung cancer cell lines as target cells. We present this result.
(1) Lymphocytes obtained by 17 days mixed lymphocyte tumor cell culture (MLTC : Fresh PBL from lung cancer patients was mixed with irradiated autologous tumor cells in a medium, and cultured for 3 days. Irradiated allogeneic lymphocytes were then added, and cultured for 14 days.) were cytotoxic against 4 of the 10 autologous lung cancer cell lines.
(2) Lymphocytes obtained by 14 days MLTC and 3 more days culture in a medium containing interleukin 2 were cytotoxic against all 10 of the autologous lung cancer cell lines. These lymphocytes proliferated to 4.13 times of the original cell number, and their surface marker was OKT3⁺. These killer lymphocytes are expected to be effective in adoptive immunotherapy as effector cells.

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