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摘要
为获得针对小鹅瘟(GP)的本动物源治疗性工程抗体,将试验室制备的 pET27b-tHC10、pET27b-tHC11、pET27b-L3 种表达载体,经大肠杆菌表达系统包涵体表达,获得 1 种轻链蛋白和 2 种截短型重链蛋白,将截短型重链和轻链按照 3:2 质量比稀释复性,获得截短型抗体 IgY(ΔFc)-10 和 IgY(ΔFc)-11。蛋白质印迹法和 ELISA 结果表明:2 种 IgY(ΔFc)均可特异性结合小鹅瘟病毒(GPV)VP2 蛋白和完整 GPV 颗粒。细胞水平阻断试验结果表明:IgY(ΔFc)-10 和 IgY(ΔFc)-11 最低有效抑制质量浓度分别为 10、5 mg·L-1。在鹅胚攻毒保护试验中,以 100 ELD50(每 0.2 mL 的 EID50 为 10-4.625)的 GPV 攻击时,100 μg 的 IgY(ΔFc)-10 和 IgY(ΔFc)-11 对鹅胚的攻毒保护率分别为 40%、60%,且存活胚胎的生长发育状态与生理盐水对照组无差异。此外,通过建立基于实时荧光定量 PCR 的 GPV 中和活性评价体系,确定 Ct=22.12 为细胞病变临界值,为抗体中和活性评估提供新方法。可知,截短型 IgY 抗体可有效阻断 GPV 感染,为小鹅瘟治疗性抗体开发奠定基础。
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刘培静,杜鑫,李慧敏,孙文影,郭笑辰,曹巍月,韩嘉驰,王敬鸣,任桂萍.
抗小鹅瘟病毒截短型 IgY 抗体表达及其中和活性检测[J].
东北农业大学学报, 2026, 57(02): 80-90 DOI:10.19720/j.cnki.issn.1005-9369.2026.02.008
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基金资助
黑龙江省重点研发计划(创新基地)项目(JD24B009)