食品科学 ›› 2011, Vol. 32 ›› Issue (17): 234-237.doi: 10.7506/spkx1002-6630-201117048

• 生物工程 • 上一篇    下一篇

聚乙二醇修饰对牛乳β-乳球蛋白抗原性的影响

蔡小飞,钟俊桢,刘成梅*,刘 伟,徐雨佳,罗舜菁   

  1. 南昌大学 食品科学与技术国家重点实验室
  • 发布日期:2011-08-30
  • 基金资助:
    国家自然科学基金项目(31071573);教育部博士点基金项目(20103601110002); 国家重点实验室目标导向项目(SKLF-MB-201004)

Effect of PEG Modification on Antigenicity of β-Lactoglobulin

CAI Xiao-fei,ZHONG Jun-zhen,LIU Cheng-mei*,LIU Wei,XU Yu-jia,LUO Shun-jing   

  1. (State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China)
  • Published:2011-08-30

摘要: 通过不同修饰反应物质的量比、修饰反应时间、pH值,用单甲氧基聚乙二醇琥珀酰亚胺酯(SC-mPEG)对牛乳β-乳球蛋白(β-LG)进行修饰,研究其抗原性的变化。利用间接竞争ELISA检测结合产物的抗原性,结果显示不同条件下PEG修饰后的β-乳球蛋白的抗原性最高降低率,反应8h时为70.2%。三硝基苯磺酸(TNBS)法测定不同条件反应后样品修饰度,反应8h时最高修饰度为39.1%。结果表明修饰反应时间为SC-mPEG修饰β-LG后其抗原性降低的主要因素。

关键词: β-乳球蛋白, 聚乙二醇, ELISA, 抗原性

Abstract: β-Lactoglobulin (β-LG) was modified by suecinimidyl carbonate methoxy polyethlene glycol (SC-mPEG) under different conditions of molar ratio, reaction time and pH. The change of its antigenicity was also studied. Indirect competitive ELISA was used to detect the antigenicity of the SC-mPEG-β-LG mixture. The results indicated that the highest reduction rate of antigenicity for modified products under different conditions was 70.2% at the reaction time of 8 h and at the same time, the highest modification degree detected by TNBS was 39.1%. Meanwhile, reaction time was the major factor affecting antigenicity reduction of β-LG modified by SC-mPEG.

Key words: β-lactoglobulin, polyethylene glycol, ELISA, antigenicity

中图分类号: