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中文摘要：
为探讨sIgMλ轻链在IBDV感染法氏囊B淋巴靶细胞过程中的作用，对DT40细胞sIgMλ轻链与IBDV的相互作用进行了研究。利用蛋白表达、VOPBA试验、病毒结合与结合抑制试验检测了sIgMλ轻链及DT40细胞结合IBDV的能力。结果表明：sIgMλ轻链在体外能够特异性地结合多种不同毒株的IBDV，这种结合与病毒毒力无关；病毒结合与结合抑制试验结果表明，超过半数的DT40细胞可以结合IBDV，这种结合能够被sIgMλ轻链特异性单抗有效阻断。研究结果表明，sIgMλ轻链是DT40细胞膜表面上IBDV的重要结合位点之一，这为进一步利用DT40细胞研究IBDV感染B淋巴靶细胞的分子机制提供了重要线索。
英文摘要：
To investigate the role of sIgM playing in the infection process of infectious bursal disease virus （IBDV）, the interactions between sIgM λ light chain and IBDV was systematically studied by using DT40, a sIg M-bearing cell line derived from chicken busal lymphoma. The experiments of protein expression, VOPBA, virus binding and binding inhibition were performed to evaluate the binding abilities of DT40 cells and sIgM λ light chain to IBDV particles. VOPBA showed that the ）, light chain of slgM specifically interacted with 4 distinct strains of IBDV in a virulence independent manner. Flow cytometric analysis also showed that more than half of DT40 cells bound IBDV particles, and the binding was efficiently inhibited by sIgM -specific monoclonal antibody （mAb） L1. Our data indicates that sIgM λ light chain plays as an important site for the binding of IBDV, which provided some important clues for the further investigations of the molecular pathogenesis of IBDV infection to B lymphocytes using DT40 as the target cell model.
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