食品科学

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双抗体夹心酶联免疫吸附法检测杏仁过敏原苦杏仁球蛋白

张洁琼,高淑霞,生 威,张 燕,王 硕   

  1. 天津科技大学食品工程与生物技术学院,教育部食品营养与安全重点实验室,天津 300457
  • 出版日期:2013-08-25 发布日期:2013-09-03

Development of Double-Antibody Sandwich ELISA for the Detection of the Almond Allergen Amandin

ZHANG Jie-qiong,GAO Shu-xia,SHENG Wei,ZHANG Yan,WANG Shuo   

  1. Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology,Tianjin University of Science and Technology, Tianjin 300457, China
  • Online:2013-08-25 Published:2013-09-03

摘要:

提取中国甜杏仁过敏原蛋白苦杏仁球蛋白,分别制备兔和鼠多克隆抗体,建立双抗体夹心酶联免疫吸附(ELISA)法。结果表明:对甜杏仁中苦杏仁球蛋白的检测限为(6.36±1.02)μg/L;对中国苦杏仁及美国大杏仁中苦杏仁球蛋白的检测限分别为(12.11±1.70)μg/L和(18.95±1.52)μg/L,且与常见的14种植物性蛋白没有交叉反应,表明该方法具有良好的特异性。将该方法用于法式小面包、饼干和脱脂牛乳中杏仁过敏原的检测,苦杏仁球蛋白的添加回收率为78.94%~125.15%,且相对标准偏差均低于5.81%。

关键词: 杏仁, 苦杏仁球蛋白, 双抗体夹心酶联免疫吸附分析法

Abstract:

In the present study, allergen amandin from Chinese sweet almond was prepared, and specific antibodies
against the amandin were produced. A double-antibody sandwich enzyme linked immunosorbent assay (ELISA) based
on rabbit polyclonal antibody and mouse polyclonal antibody was then established. The newly established ELISA could
detect amandin at levels as low as (6.36 ± 1.02) μg/L, showing no cross-reactivity with 14 common plant proteins. The
limit of detection for amandin was (12.11 ± 1.70) μg/L in Chinese bitter apricot kernel and (18.95 ± 1.52) μg/L in
almond (Amygdalus communis L.). The sandwich ELISA were used to detect the amandin in spiked samples of Frenchstyle
bread, biscuit and skim milk with recoveries ranging from 78.94% to 125.15%, and relative standard deviation (n = 3)
below 5.81%.

Key words: apricot kernel, amandin, double-antibody sandwich enzyme linked immunosorbent assay (sandwich ELISA)