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* Department of Neuroimmunology, Max-Planck-Institute for Neurobiology, Martinsried, Germany;
Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742;
Institut National de la Santé et de la Recherche Médicale Unité 546, Hôpital Pitié-Salpêtrière, Paris, France; and
Department of Medicine and Therapeutics, University of Aberdeen, Aberdeen, United Kingdom
Autoantibodies directed against conformation-dependent epitopes of the extracellular domain of the myelin oligodendrocyte glycoprotein (MOGIgd) play a major role in the immunopathogenesis of demyelination in experimental autoimmune encephalomyelitis. We now demonstrate that one or more genes encoded within the MHC selectively censor the ability of H-2b mice to mount this conformation-dependent autoantibody response, while leaving T and B cell responses to linear MOGIgd epitopes intact. This novel form of selective B cell unresponsiveness discriminates between pathogenic and nonpathogenic Ab responses to MOG and determines whether or not Ab-dependent effector mechanisms play an important role in the pathogenesis of MOG-induced experimental autoimmune encephalomyelitis in the mouse.
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