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  • Title: Antibodies targeting linear determinants of the envelope protein protect mice against West Nile virus.
    Author: Ledizet M, Kar K, Foellmer HG, Bonafé N, Anthony KG, Gould LH, Bushmich SL, Fikrig E, Koski RA.
    Journal: J Infect Dis; 2007 Dec 15; 196(12):1741-8. PubMed ID: 18190253.
    Abstract:
    The flavivirus envelope (E) protein mediates cellular attachment and fusion with host cell membranes and is recognized by virus-neutralizing antibodies. We raised antibodies against a broad range of epitopes by immunizing a horse with recombinant West Nile virus (WNV) E protein. To define epitopes recognized by protective antibodies, we selected, by affinity chromatography, immunoglobulins against immobilized linear peptides derived from parts of the E protein. Immunoglobulins binding 9 different peptides from domains I, II, and III of the E protein neutralized WNV in vitro. This indicates that multiple protective epitopes can be found in the E protein. Immunoglobulins recognizing 3 peptides derived from domains I and II of E protein protected mice against a lethal challenge with WNV. These immunoglobulins recognized the E proteins of related flaviviruses, demonstrating that antibodies targeting specific E protein epitopes could be developed for prevention and treatment of multiple flavivirus infections.
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