摘要：Synthetic vitamin K3 (VK3, 2-methyl-1,4-naphthoquinone, or menadione) has been shown to have anticancer activity in various human cancer cells. We developed an enzyme-linked immunosorbant assay (ELISA) for determination of VK3 in fetal calf serum (FCS) without any pretreatment. The monoclonal antibody against VK3, which was secreted from an established hybridoma cell line (3A3) has been proven to have highly specific binding to VK3 in cross-reactivity analysis. The full measuring range of the assay extends from 0.39 to 50 μg/ml of VK3. Based on validation analysis, this immunological analysis is a precise, accurate, and sensitive method for determination of VK3. This simple immunological method would deserve to be applicable clinically.
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