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J Neuroimmunol. 2013 Jul 15;260(1-2):92-8. doi: 10.1016/j.jneuroim.2013.04.015. Epub 2013 May 9.

Aquaporin 4 molecular mimicry and implications for neuromyelitis optica.

Author information

1
Department of Neurology, University of Louisville, KY, USA.

Abstract

Neuromyelitis optica (NMO) is associated with antibodies to aquaporin 4 (AQP4). We hypothesized that antibodies to AQP4 can be triggered by exposure to environmental proteins. We compared human AQP4 to plant and bacterial proteins to investigate the occurrence of significantly similar structures and sequences. High similarity to a known epitope for NMO-IgG, AQP4(207-232), was observed for corn ZmTIP4-1. NMO and non-NMO sera were assessed for reactivity to AQP4(207-232) and the corn peptide. NMO patient serum showed reactivity to both peptides as well as to plant tissue. These findings warrant further investigation into the role of the environment in NMO etiology.

PMID:
23664693
PMCID:
PMC3682654
DOI:
10.1016/j.jneuroim.2013.04.015
[Indexed for MEDLINE]
Free PMC Article

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