Lymphokine-Activated Killer (LAK) Cells Against Human Leukemia:Augmentation of LAK-Cell Cytotoxicity by Combinations of Lymphokines or Cytokines
Adoptive immunotherapy with lymphokine-activated killer (LAK) cells and interleukin-2 (IL-2) or induction of cytotoxic mechanisms by IL-2 alone was shown to be a promising approach in cancer therapy [1–11]. Most of the available data come from experimental and clinical studies of solid tumors, while only little is known about the effect of LAK cells against human leukemia [12–14]. Leukemia patients have been reported to have a deficiency in natural killer (NK) cell functions which may contribute to leukemogenesis. Experimental data on correcting this deficiency by IL-2 make it possible that adoptive immunotherapy of leukemia patients may be of great value in the treatment of human leukemia [15, 16]. In the present study we investigated the ability of LAK cells to lyse fresh human leukemia cells in vitro and evaluated the augmentation of cytotoxic mechanisms by combined application of IL-2 and other lymphokines or cytokines and by inhibition of prostaglandin synthesis during the activation process.
KeywordsHairy Cell Leukemia Adoptive Immunotherapy Prolymphocytic Leukemia Fresh Leukemic Cell Fresh Human Leukemia Cell
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