LYMPHOCYTE TRANSFORMATION INDUCED BY AUTOLOGOUS CELLS

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Abstract
Lymphocytes incubated with phytohemagglutinin or concanavalin A develop the capacity to stimulate autologous lymphocyte transformation. This is not attributable to residual mitogen contaminating the lymphoblastic cell preparation as: (a) the dissociation of mitogen from the lymphoblastic cell preparation increases the degree of stimulation observed and (b) the kinetics of lymphocyte transformation stimulated by phytohemagglutinin-induced lymphoblasts is different from that stimulated by phytohemagglutinin. The appearance of the stimulatory determinants on lymphocytes exposed to phytohemagglutinin precedes morphological transformation.