Abstract
Myelin basic protein (BP) emulsified in incomplete Freund's adjuvant (BP/IFA) is relatively nonencephalitogenic in Lewis rats. Furthermore, repeated injections of BP/IFA prevent subsequent induction of experimental allergic encephalomyelitis (EAE) by BP emulsified in complete Freund's adjuvant (BP/CFA). In spite of this, spleen cells from rats injected repeatedly with BP/IFA transfer EAE after they are cultured with BP almost as effectively as BP/CFA spleen cells. However, unlike the latter, BP/IFA spleen cells do not proliferate in response to BP in culture. Furthermore, BP/IFA spleen cells are unable to transfer EAE after culture with concanavalin A (Con A), in contrast to BP/CFA spleen cells. Both populations of spleen cells undergo a strong proliferative response to Con A in culture. For BP/IFA cells, at least, a proliferative response to BP in vitro is not a prerequisite for enhanced transfer of EAE in Lewis rats.
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