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  • Title: Interstrain cross-reactive idiotypes on monoclonal antibodies to an encephalitogenic myelin basic protein peptide.
    Author: Zhou SR, Whitaker JN.
    Journal: Clin Immunol Immunopathol; 1992 Apr; 63(1):74-83. PubMed ID: 1375543.
    Abstract:
    In order to assess the role of idiotype (Id) and the anti-Id network in murine experimental autoimmune encephalomyelitis (EAE), Id-bearing monoclonal antibodies (mAb) to human myelin basic protein (MBP) peptide acetyl 1-9, as well as mAb anti-Id, were developed in EAE-susceptible PL/J mice (H-2u). These mice recognize MBP residues acetyl 1-9 as an encephalitogenic determinant. Reactivities of PL/J Id-bearing mAbs to MBP and to MBP peptides were identical to those of mAbs generated against the same MBP peptide in EAE-resistant BALB/c mice (H-2d), even though isotypes of the mAbs differed. By using an inhibitory ELISA and immunoblotting, it was demonstrated that one PL/J mAb anti-Id recognized a public or framework Id, whereas another PL/J mAb-anti Id was directed to a private Id more restricted to the paratopic site. Two Id-bearing PL/J mAbs shared a cross-reactive Id (IdX) on the light chain, and an interstrain IdX was present on both the heavy and light chains of mAbs raised in PL/J and BALB/c mice to the same MBP peptide. The PL/J mAb anti-Id was capable of cross-regulating the production of Id-bearing mAbs by hybridomas across murine strains. These findings suggest that a restrictive family of germ-line genes encode for these Id-bearing antibodies to MBP peptide, irrespective of whether the MBP peptide is encephalitogenic in the murine strain immunized. Manipulation of the Id network may provide a means for modifying autoimmune demyelinating diseases of the central nervous system.
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