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In Vitro Gastric and Intestinal Digestions of Pulsed Light-Treated Shrimp Extracts

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Abstract

Pulsed ultraviolet light (PUV), a novel technology most commonly used for microbial inactivation, has recently been employed to effectively mitigate food allergens in peanuts, soybean, shrimp, and almond. Putative mechanisms for the efficacy of PUV in reducing allergen reactivity include photothermal, photochemical, and photophysical effects. To date, there are no published data highlighting the effects of in vitro simulated gastric and intestinal digestion on the stability of PUV reduced allergen reactivity of food. In this study, PUV-treated shrimp extracts were subjected to simulated gastric fluid containing pepsin and simulated intestinal fluid containing trypsin and chymotrypsin, and then tested for changes in allergen potency. SDS-PAGE showed no major band deviation between undigested and digested PUV-treated shrimp extracts. IgE binding to tropomyosin remained markedly decreased as seen in Western blot analysis. Total shrimp allergen reactivity remained unchanged following in vitro peptic digestion and was markedly reduced following in vitro intestinal digestion as illustrated in indirect ELISA. The PUV reduced shrimp allergens remained at a low level under the in vitro simulated digestive conditions. The results inferred that PUV could be a potential method to create less allergenic shrimp products that would remain at a low allergen level under human gastric and intestinal digestive conditions.

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Authors and Affiliations

  1. Department of Food Science & Human Nutrition, University of Florida, 359 FSHN Bldg. Newell Drive, Gainesville, FL, 32611, USA

    Wade W. Yang, Sandra K. Shriver & Susan Percival

  2. USDA-ARS, Southern Regional Research Center, 1100 Robert E. Lee Blvd., New Orleans, LA, 70124, USA

    Si-yin Chung

  3. Department of Agricultural and Biological Engineering, University of Florida, 207 Frazier Rogers Hall, Gainesville, FL, 32611, USA

    Melanie J. Correll

  4. Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid, 22110, Jordan

    Taha M. Rababah

Authors
  1. Wade W. Yang
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  2. Sandra K. Shriver
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  3. Si-yin Chung
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  4. Susan Percival
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  5. Melanie J. Correll
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  6. Taha M. Rababah
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Correspondence to Wade W. Yang.

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Yang, W.W., Shriver, S.K., Chung, Sy. et al. In Vitro Gastric and Intestinal Digestions of Pulsed Light-Treated Shrimp Extracts. Appl Biochem Biotechnol 166, 1409–1422 (2012). https://doi.org/10.1007/s12010-011-9534-2

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  • DOI: https://doi.org/10.1007/s12010-011-9534-2

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