Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Indirect ELISA Method for Measurement of Lactoperoxidase using IgY Antibody

IgY 항체를 이용하여 Lactoperoxidase 정량을 측정하기 위한 Indirect ELISA 방법의 개발

  • Published : 2004.06.01
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Abstract

To determine the concentration of Lactoperoxidase (LPO), an indirect enzyme-linked immunosorbant assay(ELISA) was developed. Anti-LPO egg yolk immunoglobulin(IgY) was transferred to egg yolk by immunizing of Brown hens with LPO. The titer of purified anti-LPO IgY was 1: 520,000. The immunological response of anti- LPO IgY with ${\alpha}$-lactalbumin, ${\beta}$-lactoglobulin, casein and lysozyme were evaluated, resulting that the anti-LPO IgY found to be a specific antibody toward LPO and no cross-reaction was observed against ${\alpha}$-lactalbumin, ${\beta}$-lactoglobulin, casein, and lysozyme in double immunodiffusion test and ELISA test. In indirect ELISA method, coating concentration of LPO and dilution rate of anti-LPO IgY was 0.25$\mu\textrm{g}$/mL and 1:8,000 respectively. Sensitivity in the standard curve of LPO was ranged from 0.01 to 1$\mu\textrm{g}$/mL using anti-LPO IgY.

Lactoperoxidase(LPO)를 농도를 측정하기 위한 ELISA을 개발하기 위해 LPO로 면역시킨 갈색 산란계의 계란에서 형성된 anti-LPO IgY 항체를 분리 정제하고, 분리된 anti-LPO IgY 항체의 특이성을 ELISA 와 double immunodiffusion 방법으로 조사한 후 indirect ELISA 방법을 이용한 표준곡선을 만들었다. 분리 정제된 anti-LPO IgY항체의 titer는 1:520,000이며, ELISA와 double immunodiffusion 방법 모두에서 $\alpha$-lactalbumin, $\beta$-lactoglobulin, casein 및 lysozyme하고는 교차반응을 하지 않고 LPO만 높은 특이성을 갖는 항체로 나타났다. Indirect ELISA방법에서 LPO의 coating 농도는 0.25 $\mu\textrm{g}$/mL이며 anti-LPO IgY 최적 희석배수는 1:8,000으로 나타났다. Indirect ELISA 방법으로 LPO를 측정할 수 있는 표준곡선에서 민감도의 범위는 0.0l-l $\mu\textrm{g}$/mL로 나타났다.

Keywords

References

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