Pueraria candollei associated preparation is widely applied in folk Thai medicine for rejuvenating purpose in aged people, which correlated with its pharmacological activities reported by pre-clinical and clinical trials. Therefore, standardized products of this plant are needed by consumers and health care personnel. Miroestrol, a potent and stable phytoestrogen in P. candollei, exhibited potential to be biomarker for quality control of P. candollei samples in research or industrial levels. Indirect competitive enzyme-linked immunosorbant assay (ELISA) for miroestrol determination was developed and validated by using polyclonal antibody from rabbit immunization. The polyclonal antibody recognized specifically to miroestrol, which exhibited cross-reactivity to deoxymiroestrol and isomiroestrol with 6.68% and 1.05%, respectively. The linearity range of measurement was 0.73-3000ngmL-1, which coefficient of variation (CV) of both intra- and inter-plate determination was less than 5%. With spiked samples of known amount miroestrol, the percentages of recovery were 98.80-104.37% and 98.31-106.69% in P. candollei and its involved product samples, respectively. Validated ELISA was comparable with published HPLC method (R2=0.9996) (Yusakul et al. ) in samples with various miroestrol contents. For application, the P. candollei involved preparations contained miroestrol 0.695±0.037-12.108±0.285μgg-1drywt. The developed ELISA was high performance for miroestrol determination, which could be applied for P. candollei quality control in research fields and industrial productions.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Environmental Chemistry