Pediatr Allergy Respir Dis.
2009 Mar;19(1):56-62.
Differences between Raw and Variously Cooked Sesame Seeds on the Allergenicity
- Affiliations
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- 1Department of Pediatrics and Institute of Allergy, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Korea. kwkim@yuhs.ac
- 2Nutrition Evaluation Division/Food Standardization Department, Korea Food and Drug Administration, Korea.
- 3Department of Pediatrics, Sungkyunkwan University School of Medicine, Korea.
Abstract
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PURPOSE:There has been a significant increase in the number on reports of hypersensitivity to sesame, probably because of its use in international fast-food and bakery products. Thus, we have investigated whether various cooking methods affect the allergenicity of sesame.
METHODS
Sesame seeds were roasted, boiled or fried with vegetable oil, and then their proteins were each extracted. The proteins were separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and detection of immunoglobulin (Ig) E specific to sesame seed proteins was performed with Western blotting using 6 sera.
RESULTS
SDS-PAGE of raw sesame proteins showed various-sized bands including 7, 9, 12, 15 and 17 kD known as major allergens. While only few protein bands remained in roasted or fried sesame seeds, some protein bands sized under 15 kD were observed in the boiled sesame seeds and their soup. The pooled sera yielded IgE-specific reaction with 7 kD in raw and boiled, and 37 kD in fried and boiled sesame proteins.
CONCLUSION
These findings suggest that the cooking methods may change the allergenicity of sesame seed proteins.
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