Development of an Enzyme-Linked Immunosorbent Assay for Determination Of Miroestrol Using an Anti-miroestrol Monoclonal Antibody

Abstract

Miroestrol is a chromene with potent estrogenic activity present in Pueraria candollei, commonly known as White Kwao Krua. Although this compound is only present in low amounts in the plant, it plays an important role in the estrogenic action of P. candollei products. As a tool for further studies about the efficacy and safety of P. candollei as a phytoestrogenic supplement, we generated a novel monoclonal antibody against miroestrol. This anti-miroestrol monoclonal antibody was used to develop an immunoassay for the determination of miroestrol content, which can be used for quality control purposes of P. candollei. The developed ELISA against miroestrol has a calibration range of 10–780 ng/mL miroestrol, a limit of detection of 3.5 ng/mL, and a limit of quantitation of 12.2 ng/mL. According to the validation analysis, the established ELISA is precise, accurate, specific, and sensitive for miroestrol detection in plants. Furthermore, the anti-miroestrol monoclonal antibody was used to prepare an immunoaffinity column for the isolation of miroestrol from the tuberous root of P. candollei. The column provides a simple procedure for miroestrol isolation, with a capacity of 3.91 µg of miroestrol per 1 mL of immunogel.

Key words

miroestrol - monoclonal antibody - enzyme-linked immunosorbent assay (ELISA) - immunoaffinity column - White Kwao Krua - Pueraria candollei - Fabaceae

• References

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