[Antitumor activity of human tumor infiltrating lymphocytes (TIL) and its comparison with peripheral blood lymphocytes (PBL)].

In order to search for more efficient effector cells than the classical LAK cells for tumor immunotherapy, antitumor activity of TIL was studied. Although fresh TIL were unable to kill both NK-sensitive K562 and NK-resistant Anip 973 targets, rIL-2 activated TIL from 8 lung carcinoma and 4 gastric cancer patients did express significant cytotoxicity against allogeneic solid tumor targets Antitumor activity of activated TIL was more efficient than that of activated autologous PBL By limiting dilution assay, TIL were shown to have a higher frequency of LAK precursors than PBL.