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  • Title: DM-20, a proteolipid apoprotein, is an encephalitogen of acute and relapsing autoimmune encephalomyelitis in mice.
    Author: Endoh M, Tabira T, Kunishita T, Sakai K, Yamamura T, Taketomi T.
    Journal: J Immunol; 1986 Dec 15; 137(12):3832-5. PubMed ID: 3491150.
    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.
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