LYMPHOID CELLS IN DELAYED HYPERSENSITIVITY

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Abstract
X-irradiation up to 480 R does not inhibit either adoptive transfer of delayed hypersensitivity or production in vitro of soluble mediators, such as migration-inhibitory factor (MIF). Above that dosage and as high as 3000 R, adoptive transfer is inhibited, but production of MIF is not. An increase in skin response occurred when 24–48 hr were allowed to elapse after intravenous transfer and before skin testing. Treatment of recipients with colchicine at the time of adoptive transfer inhibited the development of a skin reaction to specific antigen.