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  • Title: Immune tolerance mediated by recombinant proteolipid protein prevents experimental autoimmune encephalomyelitis.
    Author: Elliott EA, Cofiell R, Wilkins JA, Raine CS, Matis LA, Mueller JP.
    Journal: J Neuroimmunol; 1997 Oct; 79(1):1-11. PubMed ID: 9357441.
    Abstract:
    Proteolipid protein (PLP), a transmembrane protein expressed only in the central nervous system (CNS), is a candidate target autoantigen for autoimmune-mediated demyelination. We have evaluated the effect of a recombinant form of the PLP protein, delta PLP4, in a murine model of experimental autoimmune encephalomyelitis (EAE). PLP-specific T-cell responses were observed following immunization of SJL/J, PL/J and SWR mice with delta PLP4, demonstrating processing of the protein to several distinct antigenic epitopes. Clinical EAE associated with inflammation and demyelination in the CNS also developed after sensitization of mice with delta PLP4 in adjuvant. Conversely, tolerance to delta PLP4 in adult mice and prevention of PLP peptide 139-151-induced EAE was induced by intravenous injection of soluble delta PLP4. The prevention of disease onset was paralleled by a significant reduction in demyelination and CNS inflammatory cell infiltration and diminished PLP139-151-specific T-cell proliferative responses. These results are consistent with the establishment of peripheral T-cell tolerance and reinforce the notion that recombinant myelin antigens and intravenous tolerance induction may prove useful in the modulation of the human demyelinating disease, multiple sclerosis (MS).
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