Myelin basic protein in lipid-bound form induces experimental allergic encephalomyelitis and demyelination in Lewis rat.

: Myelin basic protein (MBP) was isolated from guinea-pig spinal cord in a form retaining the binding to all the myelin lipids. This new, lipid-bound and native-like preparation was used to immunize Lewis rats in complete Freund's adjuvant (CFA) in order to produce experimental allergic encephalomyelitis (EAE). The clinical features were compared with those of Lewis rats immunized with lipid-free MBP (LF-MBP), myelin, LF-MBP + octyl-POE (the non-ionic detergent used for the purification of LB-MBP) and octyl-POE alone. The clinical observation indicate that LB-MBP exerts an encephalitogenic activity on Lewis rats which is more intense than LF-MBP and includes demyelinating lesions in the central nervous system (CNS). The data suggest that LB-MBP is a new encephalitogenic antigen, which may induce more intensive immunization in rats and may be relevant in humans for autoimmune demyelinating diseases of the CNS.