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Development of ELISA Method for the Determination of Compound K  

Ryu, Mina (College of Pharmacy, Chonnam National University)
Li, Hai Guang (College of Pharmacy, Chonnam National University)
Sung, Jong Hwan (IlHwa Corp.)
Sung, Chung Ki (College of Pharmacy, Chonnam National University)
Publication Information
Korean Journal of Pharmacognosy / v.46, no.4, 2015 , pp. 279-282 More about this Journal
Abstract
In order to quantify compound K(CK), anticancer component of Panax ginseng C. A. Meyer, high titer rabbit polyclonal antibodies (pAbs) were raised against a conjugate of CK and bovine serum albumin coupled by a periodate oxidation method. Coating antigen (CK-OVA) was also prepared by the same method with OVA. As a result of optimization of antiserum dilution (2,000 fold), coating antigen ($25{\mu}g/ml$) and other condition (incubation time, temperature and washing method), ELISA method for the determination of CK was established. The measuring range extended from 0.5 ng/ml to 25 ng/ml of CK. The antibodies exhibited minor or even no cross reactivities with protopanaxatriol (1.56%) and other tested ginsenosides, $GRb_1$ (0.11%), $GRg_1$ (0.07%) except protopanaxadiol (87.2%) from the structural similarity. And the antibody showed good correlation (r=0.987) between the assay values obtained by this ELISA method and HPLC. Therefore, the ELISA method could be very useful tools for the determination of CK in biological fluids because of their high sensitivity and specificity.
Keywords
Compound K; CK-BSA; CK-OVA; Polyclonal antibody; ELISA;
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