The Journal of Immunology, Vol 130, Issue 1 191-194, Copyright © 1983 by American Association of Immunologists

ARTICLES

Induction of experimental allergic encephalomyelitis in PL/J and (SJL/J x PL/J)F1 mice by myelin basic protein and its peptides: localization of a second encephalitogenic determinant

RB Fritz, CH Chou and DE McFarlin

SJL/J, PL/J, and (SJL/J x PL/J)F1 mice were immunized with bovine, guinea pig, mouse, or rat myelin basic proteins (MBP) in adjuvant containing Mycobacterium tuberculosis H37Ra. Twenty-four and 72 hr later, Bordetella pertussis vaccine was given i.v. All MBP tested induced experimental allergic encephalomyelitis (EAE) in SJL/J and F1 mice; however, bovine MBP was inactive in PL/J mice. Each strain was immunized in a similar manner with peptic peptides, residues 1-37, 43- 88, and 89-169 of guinea pig MBP. In contrast to the SJL/J strain, which has been shown to recognize a major encephalitogenic determinant in peptide 89-169, PL/J and F1 mice responded primarily to an encephalitogenic determinant within peptide 1-37. Analysis of antibody levels showed that SJL/J mice made no antibody to peptide 1-37, although anti-peptide 89-169 antibodies were consistently found. Conversely, PL/J mice responded well to peptide 1-37, but only an occasional animal made a significant response to peptide 89-169. (SJL/J x PL/J)F1 mice were more susceptible to EAE than either parental strain, as shown by the percentage of animals showing neurologic signs and by clinical severity.

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