Abstract:
The majority of allergic reactions to dietary components were caused by a large number of foods. Among them, cereals including peanut, soybean, wheat and buckwheat have been addressed in allergen labeling legislation EU, Japan Australia and New Zealand. Since labeling help consumers identify whether or not a food contains an ingredient that they had to avoid, the development of analytical methods for allergen detection was necessary for monitoring the implementation of such guidelines.A simple and rapid method for detection is developed to simple and rapid detection of allergen in peanut, soybean, wheat and buckwheat is developed based on either Polymerase Chain Reaction and isothermal DNA amplification. By employing DNA amplification with set of primers targeting the Ara h1, Lectin, Acc1 and 2S albumin gene of peanut, soybean wheat and buckwheat respectively, amplification products ranking in size of 263, 222, 195, 207 nucleotides respectively and that of isothermal DNA amplification product with DNA ladder of more than multiple of DNA fragment 195-263nt size range.When electrochemical assay were carried out, results showed anodic current peak varies in between 2.0 to 0.5 µA, The sensitivity, with a detection were obtain limit at 0.005% of allergenic ingredients contaminate. No cross-reactivities was observed from the samples of other related cereals. The method constitute a basic for a rapid and simple test of major cereal allergen trace. This application combined loop isothermal DNA amplification with biosensor for identified 10 kinds of allergenic food ingredients from markets, the results showed targets DNA were detected conformed to allergen labeling on product.