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J Neuroimmunol. 2001 May 1;116(1):83-93.

"Classic" myelin basic proteins are expressed in lymphoid tissue macrophages.

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UCLA Department of Neurology, Reed Neurological Research Center, Los Angeles, CA 90095, USA.


"Classic" myelin basic proteins (MBPs) are demonstrated in lymph nodes of SJL mice by western blot and RT-PCR. Interestingly, expression of these "classic" MBPs was increased during the late relapsing phase of adoptive experimental autoimmune encephalomyelitis (EAE). When splenocytes from SJL mice were separated into macrophage versus B lymphocyte-enriched populations, intact MBP isoforms were demonstrated in the macrophage-enriched population while undetectable in the B lymphocyte-enriched population. RT-PCR demonstrated "classic" MBP transcripts in splenic macrophages, as well as in a macrophage cell line (RAW). The expression of "classic" MBPs in lymphoid tissue macrophages raises the possibility that MBP-specific T cells may be exposed to autoantigen outside the central nervous system (CNS).

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