Abstract
The capacity of human mononuclear (MN) cells pretreated with concanavalin A (Con A) to suppress the activity of fresh phytohemagglutinin (PHA)-pulsed mononuclear cells was assessed. Con A-pretreated MN cells suppressed leukocyte inhibitory factor (LIF) activity in supernatants of PHA-pulsed cell cultures and [ 3H]thymidine incorporation by these cells. Suppression was obtained in both allogeneic and autologous systems with mitomycin-treated, irradiated, or untreated Con A-induced cells. Lymphocytes from two patients that, following treatment with Con A, did not suppress mitogen-induced proliferative response of normal cells also did not suppress LIF production.
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