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哈维氏弧菌溶血素的包涵体纯化、多抗制备及活性验证

赵小然  郭羿  党慧凤  邢震宇  何哲  叶仕根  
【摘要】:为进一步研究哈维氏弧菌溶血素(Vibrio harveyi hemolysin, VHH)的生物学功能,构建了vhh原核表达载体,并利用纯化的重组蛋白制备多克隆抗体,采用DOT-ELISA和Western-blot方法检测抗体的效价及特异性,并通过溶血试验评估抗体对哈维氏弧菌培养物上清溶血活性的影响。结果表明:在构建得到的表达菌株pET28a-vhh-BL21(DE3)中,重组蛋白以包涵体形式大量表达;对该重组蛋白进行纯化并复性后,利用纯化的蛋白免疫小鼠制备的多克隆抗体效价为1∶163 840,可特异性识别VHH蛋白,且稀释倍数小于1000时,可显著抑制哈维氏弧菌培养物上清的溶血活性。本研究结果对VHH单抗的制备、哈维氏弧菌检测手段的完善及哈维氏弧菌的疫苗研发具有一定参考作用。

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