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. 2010 Oct;39(5):359-65.
doi: 10.1080/03079457.2010.506211.

Surface IgM on DT40 cells may be a component of the putative receptor complex responsible for the binding of infectious bursal disease virus

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Surface IgM on DT40 cells may be a component of the putative receptor complex responsible for the binding of infectious bursal disease virus

Jun Luo et al. Avian Pathol. 2010 Oct.

Abstract

To investigate the host-pathogen interactions between infectious bursal disease virus (IBDV) and target B-lymphocytic cells, a cDNA T7 phage display library from the chicken bursa of Fabricius was constructed and screened for virus binding. Surface immunoglobulin M (sIgM) was isolated as a putative candidate binding site and its interactions with IBDV were further investigated using a chicken bursal lymphoma-derived cell line DT40. The results showed that the λ light chain of sIgM specifically interacted with IBDV in a virulence-independent manner in vitro, and most of the binding of IBDV to DT40 cells was inhibited by sIgM-specific monoclonal antibodies. Further, the infectivity of IBDV in vitro was reduced by sIgM-specific monoclonal antibodies. Our data provided evidence that sIgM may participate as one of the putative membrane binding sites responsible for IBDV infection.

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