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Yu, Hui-Lin; Cao, Min-Jie; Cai, Qiu-Feng; Weng, Wu-Yin; Su, Wen-Jin; Liu, Guang-Ming
Food and chemical toxicology, 04/2011, Volume: 49, Issue: 4Journal Article
Crustacean allergy is a significant health problem around the world, and tropomyosin (TM) represents the major allergen of crustaceans. The aim of this study was to evaluate three processing methods (boiling, CUB, HPS) and identify the one method that is most effective in the degradation of TM and reduction of its IgE-binding reactivity, and make it easier to be decomposed during gastrointestinal digestion. SDS–PAGE analysis indicated that boiling had little impact on the digestive stability of TM. In contrast, combined ultrasound and boiling (CUB), and high pressure steaming (HPS) both could accelerate the digestion of TM. Similarly, western blotting and inhibition ELISA also demonstrated that the reactivity of IgG/IgE-binding of TM that was extracted from processed crab was partially decreased after treating with CUB or HPS. Among the three processing methods, HPS was the most effective method to accelerate the digestion of TM in gastrointestinal digestion, and reduce the reactivity of IgG/IgE-binding of TM. These results suggest that proper processing of crab could promote the degradation of TM in simulated gastrointestinal digestion, reduce the reactivity of IgG/IgE-binding of TM, and decrease the incidence of crab hypersensitivity in humans.
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