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    Nat Clin Pract Neurol. 2008 Apr;4(4):202-14. Epub 2008 Mar 11.

    Mechanisms of disease: aquaporin-4 antibodies in neuromyelitis optica.

    Jarius S, Paul F, Franciotta D, Waters P, Zipp F, Hohlfeld R, Vincent A, Wildemann B.

    Source

    Weatherall Institute of Molecular Medicine, University of Oxford, UK.

    Abstract

    Neuromyelitis optica (NMO) is a rare CNS inflammatory disorder that predominantly affects the optic nerves and spinal cord. Recent serological findings strongly suggest that NMO is a distinct disease rather than a subtype of multiple sclerosis. In NMO, serum antibodies, collectively known as NMO-IgG, characteristically bind to cerebral microvessels, pia mater and Virchow-Robin spaces. The main target antigen for this immunoreactivity has been identified as aquaporin-4 (AQP4). The antibodies are highly specific for NMO, and they are also found in patients with longitudinally extensive transverse myelitis without optic neuritis, which is thought to be a precursor to NMO in some cases. An antibody-mediated pathogenesis for NMO is supported by several observations, including the characteristics of the AQP4 antibodies, the distinct NMO pathology--which includes IgG and complement deposition and loss of AQP4 from spinal cord lesions--and emerging evidence of the beneficial effects of B-cell depletion and plasma exchange. Many aspects of the pathogenesis, however, remain unclear.

    PMID:
    18334978
    [PubMed - indexed for MEDLINE]

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