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Preparation of egg yolk immunoglobulin against recombinant neutrophil activating protein in Helicobacter pylori
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 5
- DOI:
- 10.3969/j.issn.1009-3079.2007.05.007
- Key Word:
- 幽门螺杆菌;重组蛋白;中性粒细胞激活蛋白;蛋黄抗体
Abstract： 目的:制备高效价的.抗Nap蛋黄抗体(IgY).方法:大量诱导、培养重组菌pQE30-NapA-DH5α获得重组蛋白Nap,经Ni2+-NTA树脂纯化后,Bradford法测定蛋白浓度.用纯化的Nap蛋白免疫鸡,水稀释结合氯仿有机沉淀法提取IgY.ELISA法测定抗体产生的时间-效价变化.将效价高的Nap-IgY用硫酸铵沉淀法纯化浓缩,间接ELISA法检测效价,Bradford法测定蛋白含量.Western blot检测制备的Nap-IgY的抗体活性.结果:Nap重组蛋白主要以包涵体形式表达,蛋白含量为0.37 g/L.免疫鸡的蛋黄提取物可与Nap发生特异性反应,IgY效价随免疫时间增加而升高,在110 d达最高效价.经纯化浓缩后,Nap-IgY的效价为1:12800,蛋白浓度为23.67 g/L.结论:成功制备了高浓度、高效价的Nap特异性IgY.
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