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  • Title: Development of an enzyme-linked immunosorbent assay (ELISA) using highly-specific monoclonal antibodies against plumbagin.
    Author: Sakamoto S, Putalun W, Tsuchihashi R, Morimoto S, Kinjo J, Tanaka H.
    Journal: Anal Chim Acta; 2008 Jan 21; 607(1):100-5. PubMed ID: 18155415.
    Abstract:
    Plumbagin (PL; 5-hydroxy-2-methyl-1,4-naphthoquinone) is a natural compound mainly isolated from Plumbago zeylanica. This plant is distributed in Southeast Asia, and well known as Ayurvedic medicine in India for its medicinal properties. PL has been shown to have various pharmacological activities. We have successfully prepared monoclonal antibodies against PL, and developed an enzyme-linked immunosorbent assay (ELISA) system for determination of PL. 3-(5-Hydroxy-2-methyl-1,4-naphthoquinone-3-yl) propanoic acid was synthesized and purified to prepare PL-bovine serum albumin conjugate (PL-BSA), which was used as an immunogen. PL-BSA conjugate was administered into BALB/c male mice for production of monoclonal antibodies against PL. The monoclonal antibody against PL which is secreted from established hybridoma cell line 3A3 (MAb 3A3) has been proven to have highly-specific to PL resulting from cross-reactivities test. The range for calibration of PL by ELISA was 0.2-25 microg mL(-1). Based on validation analysis, this analytical method by ELISA is a precise, accurate, and sensitive method for the determination of PL in plant.
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