[Preliminary study of determination of Shougong in Jinlong Capsules based on fluorescence quantitative PCR method]

A pair of species-specific primer (GZG1/GZG2) based on COⅠ sequence regions for identification of Gekko chinensis were designed. A fluorescent quantitative PCR method was established to identify and quantify G. chinensis from Jinlong Capsules Formula. A standard curve for quantitative analysis of G. chinensis was established (the standard curve equation: y=-3.012 7x+34.501, y is Ct value, x is lg N, N is the copies of COⅠ fragment from G. chinensis). Samples included G. chinensis appeared amplification, while falsify group (not included G. chinensis) and negative control did not have amplification products. The copy number of COⅠ region of G. chinensis was respectively 11.511×10⁶, 6.416×10⁶, 2.553×10⁶ copies/μL in all quality goods, quality goods-adulterants 1:1, quality goods-adulterants 1:4. The results accorded with proportion of adding amount roughly. This study can provide a new strategy for quality control of Chinese patent medicine containing animal drug ingredients.