title: DM-20, a proteolipid apoprotein, is an encephalitogen of acute and relapsing autoimmune encephalomyelitis in mice.
abstract: Experimental allergic encephalomyelitis (EAE) was successfully induced in BALB/c mice with DM-20, a protein component of proteolipid apoprotein. DM-20 was separated by ion exchange column chromatography with CM-Trisacryl from proteolipid apoprotein obtained from bovine spinal cords. Its purity was ascertained by SDS-polyacrylamide gel electrophoresis, a dot immunobinding procedure, and amino acid analysis. Nine of 15 animals with a single injection of 100 micrograms of DM-20 and five of seven animals with a booster injection developed hind leg paralysis or axial rotatory movement 16 to 27 days after sensitization (mean 21.3 days). Five of the 14 animals relapsed 2 to 6 wk after the first attack. Histological examination revealed inflammatory lesion, with significant demyelination in the central nervous system. Antibody levels to DM-20 were not related to the clinical signs. Five of 11 BALB/c nude mice reconstituted with T cells developed similar clinical and pathologic signs. This DM-20-induced EAE in mice may provide a valuable model because it is similar to multiple sclerosis and because it can be induced in inbred mice in which immune mechanisms can be easily studied.
mesh_terms: D000208:Acute Disease; D000818:Animals; D002417:Cattle; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D005260:Female; D051379:Mice; D008807:Mice, Inbred BALB C / Q000276:immunology; D008819:Mice, Nude / Q000276:immunology; D018991:Myelin Proteolipid Protein; D009419:Nerve Tissue Proteins; D011510:Proteolipids / Q000276:immunology* / Q000302:isolation & purification; D012008:Recurrence; D013116:Spinal Cord / Q000032:analysis / Q000473:pathology; D013601:T-Lymphocytes / Q000637:transplantation
chemical_list: D018991:Myelin Proteolipid Protein; D009419:Nerve Tissue Proteins; C047516:Plp1 protein, mouse; D011510:Proteolipids