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In vitro modulation of interleukin-2-mediated human peripheral mononuclear cell proliferation and antitumor cytotoxicity by 5-fluorouracil. | LitMetric
Background : Studies on cancer patients undergoing chemotherapy have shown inhibitory effects of anticancer drugs on certain immune activities.Materials And Methods : The in vitro effect of 5-(FU) fluorouracil was studied on both lymphocyte proliferation and natural killer (NK) cell antitumor cytotoxicity following incubation of peripheral mononuclear cells (PBMCs) from healthy donors with interleukin (IL)-2, phytohemagglutinin A (PHA) and pokeweed mitogen (PWM).Results : Activation of PBMCs with IL-2, PHA and PWM in the presence of 250 and 2500 microM of 5-FU caused a marked decrease in both the induction of activated natural killer (ANK) cell cytotoxic activity and DNA synthesis, while 2.5 microM increased DNA synthesis by 195%, 58% and 222% for IL-2, PHA and PWM, respectively, more than cells cultured without the drug. No effect of 5-FU was noted on mature ANK cells.Conclusion : 5-FU exhibits diverse effects on lymphocyte proliferation and on the generation of ANK antitumor cytotoxic activity.
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