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Year : 2017  |  Volume : 13  |  Issue : 52  |  Page : 845-851

A new highly selective and specific anti-puerarin polyclonal antibody for determination of puerarin using a mannich reaction hapten conjugate

1 Department of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University; Research Group for Pharmaceutical Activities of Natural Products using Pharmaceutical Biotechnology, National Research University, Khon Kaen University, Khon Kaen 40002, Thailand
2 Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan

Correspondence Address:
Waraporn Putalun
Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-1296.224331

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Background: Puerarin (PUE) is a phytoestrogen found in Pueraria candollei and Pueraria lobata. These plants are substantial for traditional medicine in various Asian countries. PUE is a key marker that can be found only in the Pueraria species. Objective: To establish the method for determination of PUE content which is required for quality control of pharmaceutical products. Materials and Methods: PUE-cationized bovine serum albumin conjugate was created via Mannich reaction. After the rabbit immunization, the obtain anti-PUE polyclonal antibody (PAb) was used to develop an enzyme-linked immunosorbent assay (ELISA). Results: An anti-PUE PAb possess a great sensitivity and specificity. The cross-reactivity analysis shows no cross-reaction of an established antibody against other substances. In addition, we successfully developed an indirect competitive ELISA (icELISA) for the quantitative analysis of PUE. The result of method validation conforms to acceptance criteria and correlates with high-performance liquid chromatography, the reference method. The icELISA was applied to determine PUE content in Pueraria spp. plant samples and its derived pharmaceutical products. Conclusion: This highly specific immunogen was created from the Mannich reaction. An icELISA can also be applied to other research propose in the further studies. Abbreviations used: PUE: Puerarin; PAb: Polyclonal antibody; ELISA: Enzyme-linked immunosorbent assay; icELISA: Indirect competitive ELISA; cBSA: Cationized bovine serum albumin.

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