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논문 기본 정보

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학술저널
저자정보
Gantulga Purevsan (Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.Department of Medical Sciences, Graduate School of Medicine, Ajou University, Suwon, Korea.) Lee Jeongmin (Department of Pediatrics, Yonsei University Wonju College of Medicine, Wonju, Korea.) Jeong Kyunguk (Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.) Jeon Se-Ah (Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.) Lee Sooyoung (Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.)
저널정보
대한의학회 Journal of Korean Medical Science Journal of Korean Medical Science Vol.39 No.6
발행연도
2024.2
수록면
1 - 10 (10page)
DOI
10.3346/jkms.2024.39.e54

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초록· 키워드

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Background: Hen’s egg white (HEW) is the most common cause of food allergy in children which induces mild to fatal reactions. The consultation for a proper restriction is important in HEW allergy. We aimed to identify the changes in HEW allergenicity using diverse cooking methods commonly used in Korean dishes. Methods: Crude extract of raw and 4 types of cooked HEW extracts were produced and used for sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE), enzyme-linked immunosorbent assay (ELISA), and ELISA inhibition assays using 45 serum samples from HEW allergic and tolerant children. Extracts were prepared; scrambled without oil for 20–30 seconds in frying pan without oil, boiled at 100°C for 15 minutes, short-baked at 180°C for 20 minutes, and long-baked at 45°C for 12 hours with a gradual increase in temperature up to 110°C for additional 12 hours, respectively. Results: In SDS-PAGE, the intensity of bands of 50–54 kDa decreased by boiling and baking. All bands almost disappeared in long-baked eggs. The intensity of the ovalbumin (OVA) immunoglobulin E (IgE) bands did not change after scrambling; however, an evident decrease was observed in boiled egg white (EW). In contrast, ovomucoid (OM) IgE bands were darker and wider after scrambling and boiling. The IgE binding reactivity to all EW allergens were weakened in short-baked EW and considerably diminished in long-baked EW. In individual ELISA analysis using OVA+ OM+ serum samples, the median of specific IgE optical density values was 0.435 in raw EW, 0.476 in scrambled EW, and 0.487 in boiled EW. Conversely, it was significantly decreased in short-baked (0.406) and long-baked EW (0.012). Significant inhibition was observed by four inhibitors such as raw, scrambled, boiled and short-baked HEW, but there was no significant inhibition by long-baked HEW (IC50 > 100 mg/mL). Conclusion: We identified minimally reduced allergenicity in scrambled EW and extensively decreased allergenicity in long-baked EW comparing to boiled and short-baked EW as well as raw EW. By applying the results of this study, we would be able to provide safer dietary guidence with higher quality to egg allergic children.
#Egg White Proteins #Food Allergy #Cooking #Allergenicity

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