FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (13): 94-99.doi: 10.7506/spkx1002-6630-201813015

• Food Engineering • Previous Articles     Next Articles

Effect of Different Thermal Processing Treatments on Allergenicity of Walnut Proteins

JIANG Songsong, ZHAO Bo, HAN Shiwen, CHE Huilian*   

  1. Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Online:2018-07-15 Published:2018-07-09

Abstract: In recent years, walnut allergy is commonly reported as tree nut allergy responsible for severe anaphylactic reactions. Different processing treatments can change the chemical and physical properties of walnut allergen proteins (Jug r 1), thereby affecting their allergenic properties. In this study, we evaluated the effect of different thermal treatments on the allergenic properties of walnuts. The antigenicity of walnuts subjected to different thermal treatments including wet heating, dry heating, high-pressure heating, and microwave heating was evaluated by immunoglobulin (Ig) E/IgG-immunoblot analysis. Our results showed both wet heating and high-pressure heating effectively reduced the content and antigenicity of walnut proteins and high-pressure heating was more effective (P < 0.05), while microwave heating had the opposite effect. These results can provide a scientific basis for developing hypoallergenic/no-allergic walnut products.

Key words: walnut proteins, thermal treatments, walnut allergen proteins (Jug r 1), allergenicity

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