Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Heat Treatment on the Antigenicity of Gamma-Irradiated Egg White Albumin

감마선 조사된 난백 알부민의 항원성에 미치는 가열의 영향

  • 이주운 (한국원자력연구소 방사선식품·생명공학기술개발팀) ;
  • 육홍선 (한국원자력연구소 방사선식품·생명공학기술개발팀) ;
  • 조경환 (한국원자력연구소 방사선식품·생명공학기술개발팀) ;
  • 김미리 (충남대학교 식품영양학과) ;
  • 김천제 (건국대학교 축산가공학과)
  • Published : 2001.10.01
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Abstract

This research was conducted to study the effects on antigenicities (allergenicity) and structural changes of gamma-irradiated hen’s egg albumin (ovalbumin, OVA) by heating. Three groups of OVA solution (2.0 mg/mL) were prepared; 1) heat treatment; 2) irradiation after heating; 3) heating after irradiation. Samples were isothermally heated and/or irradiated at the absorption dose of 10 kGy. Competitive indirect ELISA was individually formatted with egg-allergic patients IgE (P-IgE), and mouse murine monoclonal IgG (M-IgG) and rabbit polyclonal IgG (R-IgG) for evaluating bindinhg abilities of antibodies to OVA in the sample solutions. Binding abilities of antibodies to thermally denatured OVA were changed : R-IgG to the sample treated with above 6$0^{\circ}C$, M-IgG to that above 7$0^{\circ}C$, and P-IgE to that above 8$0^{\circ}C$, respectively. P-IgE did not well recognize OVA heated at 8$0^{\circ}C$ and the above. However, binding abilities of M-IgG and R-IgG highly in creased. Significant differences of binding abilities were not observed in all samples with the combination of heat treatment and irradiation, regardless the order of the treatment. Turbidity of samples in creased both by heating and by irradiation, and the increase by irradiation was much higher than by heating. These results showed that allergenicity of OVA reduced by gamma irradiation was not affected by heating.

이 연구는 난백단백질의 알러지성을 없애기 위해 감마선 조사된 OVA에 대한 가열처리가 항원성(알러지성) 및 구조 변화에 미치는 영향을 조사하기위해 수행되었다. OVA 용액 (2.0 mg/mL)을 1) 가열처리구; 2) 가열 후 조사구; 3) 조사 후 가열처리구로 준비하였다. 시료를 개별적으로 가열처리하였고, 감마선 조사는 10 kGy의 흡수선량을 얻도록 조사하였다. 계란알러지가 있는 환자의 혈청과 OVA에 대해 생산된 단클론항체(M-IgG)와 다클론항체(R-IgG)를 사용하여 확립된 경합간접효소면역분석법을 사용하여 시료용액에 있는 OVA의 항원-항체 반응성을 측정하였다. 열변성된 OVA에 대한 항체반응성은 R-IgG가 6$0^{\circ}C$, M-IgG가 7$0^{\circ}C$부터, 그리고 P-IgE의 경우 8$0^{\circ}C$부터 변화하기 시작하였다. P-IgE는 8$0^{\circ}C$이상의 온도에서 가열된 OVA를 잘 인식하지 못하였다. 반면에, M-IgG와 R-IgGdmlruddn 가열처리된 OVA에 대한 P-IgE의 항원-항체 반응성에 미치는 영향은 처리 순서와는 관계없이 모든 가열온도에서 가열처리에 의한 큰 변화를 나타내지 않았다. 가열처리와 감마선 조사에서 시료용액의 혼탁도가 모두 증가하였고, 가열처리보다는 감마선 조사에 의한 혼탁도의 증가가 매우 높았다. 이 결과들은 가열처리가 감마선 조사되어 감소되어 있는 OVA의 알러지성에 큰 영향을 미치지 않는 것을 나타내었다.

Keywords

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