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Spleen cells from myelin basic protein (BP)-sensitized donor rats appear to be incapable of adoptively transferring experimental allergic encephalomyelitis (EAE) directly to normal recipients. It has been reported that in vitro incubation with concanavalin A (Con A) activates rat spleen cells so that they are capable of transferring EAE. We report here that incubation with specific antigen, BP, also permits transfer of disease with spleen cells. Data are presented in which activation of EAE spleen cells by Con A is compared with activation by BP. Cellular proliferation does not appear to be necessary for in vitro activation with specific antigen.
Richert et al. (1979) studied this question.