Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Production of Monoclonal Antibodies against Vibrio parahaemolyticus and Development of High Sensitive Immuno-Selective Filtration Method

Vibrio parahaemolyticus에 대한 단클론성 항체 개발과 고감도 면역선택여과법의 개발

  • Kim, Jeong-Sook (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Choi, Young-Dong (Division of Applied Life Science, Graduate School, Gyeongsang National University) ;
  • Shim, Won-Bo (Institute of Agriculture and Life Science, Gyeongsang National University)
  • 김정숙 (경상대학교 농업생명과학연구원) ;
  • 최영동 (경상대학교 응용생명과학부) ;
  • 심원보 (경상대학교 농업생명과학연구원)
  • Received : 2016.01.08
  • Accepted : 2016.01.25
  • Published : 2016.02.28
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Abstract

The objectives of this study are to produce monoclonal antibodies (MAbs) against Vibrio parahaemolyticus and to develop an immuno-selective filtration (ISF) method for the rapid and sensitive detection of V. parahaemolyticus. The characterization of the MAb produced from HKVP 4H9-9 hybridoma cell was validated by enzyme-linked immunosorbent assay (ELISA) and western blot. The produced MAb was specific to V. parahaemolyticus and showed weak cross-reaction to V. alginolyticus, V. vulnificus and Staphylococcus aureus. After optimization of the method, $5{\times}10^1cell/mL$ of V. parahaemolyticus in a pure culture could be detectable. Although weak cross-reactivity to V. vulnificus, V. alginolyticus and Staphylococcus aureus was observed, the ISF was confirmed to be highly specific to V. parahaemolyticus. Especially, the ISF showed the most sensitivity compared to the immunoassays currently reported is easier to perform and quicker than ID-ELISA.

본 연구에서는 V. parahaemolyticus를 신속정확하게 고감도로 검출하기 위해 단클론성 항체를 개발하고 이를 이용하여 일반적인 효소면역분석법(ELISA)과 효소면역분석법의 낮은 민감도를 보완할 수 있는 면역선택여과법(ISF)을 개발하여 민감도 및 효율성을 비교분석 하였다. 먼저 heat killed V. parahaemolyticus (HKVP)를 준비하여 7주령 BALB/c mouse에 면역한 후 세포융합 및 클로닝을 통해 HKVP 4H9-9번 및 16번 2종의 hybridoma cell을 확보하였다. Western blot을 통해 보다 특이성이 높은 것으로 확인된 HKVP 4H9-9번 항체를 대량 생산정제하여 분석법을 확립한 결과 검출한계가 ID-ELISA법은 $10^6cell/mL$, ISF 법은 $5{\times}10^1cell/mL$로 나타나 ISF법의 민감도가 매우 높은 것으로 확인되었다. 분석효율성은 ID-ELISA법의 경우 분석을 위해 9단계의 과정을 거쳐 총 16시간의 분석시간이 소요된 반면, ISF법의 경우 3단계의 과정을 거쳐 1시간 이내에 분석을 완료할 수 있는 것으로 확인되었다. 교차반응성의 경우 두 분석법 모두 일부 Vibrio spp. (IDELISA법: V. alginolyticus, ISF법: V. vulnificus)과 S. aureus에 반응성이 있는 것으로 확인되었지만 V. parahaemolyticus에 보다 강한 반응성을 나타내었기 때문에 V. parahaemolyticus에 특이적인 분석법인 것으로 확인되었다. 특히 ISF법은 ELISA법 보다 민감도가 높고 분석에 소요되는 시간도 짧아 V. parahaemolyticus를 신속하게 분석하는데 활용이 가능할 것으로 판단된다.

Keywords

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