Abstract
In this study, we developed a convenient and easy-to-use origin identification method for antler velvets based on a simple DNA extraction technique and single-stranded tag hybridization chromatographic printed-array strip (STH-PAS). The primer sets used to detect Cervus elaphus, Rangifer tarandus, and 12S rRNA did not engage in non-specific reactions such as primer dimer formation. In both the triplex and singleplex assays, the sensitivity was < 1 ng DNA. Moreover, Cervus elaphus DNA could be detected in OTC crude drug products. Although the detection sensitivity resulting from the simplified extraction was slightly lower than that obtained with extraction by conventional methods, the amount of DNA was sufficient even from a small sample. The choice of a triplex or singleplex assay will depend on the purpose of the test. For example, if it is important to determine whether the antler velvet is derived from Cervus elaphus or Rangifer tarandus, a triplex assay is appropriate. If it is necessary to explore whether antler velvet from Cervus elaphus is included in an OTC crude drug product, a singleplex assay using the Cervus elaphus primer set is informative. If it is necessary to explore whether powdered antler velvet includes counterfeit products (from Rangifer tarandus), a singleplex assay employing the Rangifer tarandus primer is appropriate. The singleplex assay detects minor components even at a 1,000:1 ratio. Our study thus demonstrated the utility of a method combining simple DNA extraction with STH-PAS for efficient identification of the origin of antler velvets.
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Acknowledgements
We are grateful to Dr. Yutaka Yamamoto (Tochimoto Tenkaido) for providing some animal-derived crude drugs. We thank Dr. Mitsuo Kawase and Dr. Takuya Kodera (TBA Co., Ltd.) for technical assistance.
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Conceptualization, investigation, and writing, HN; review and editing, AT, KY, K. Sakai, and K. Saito. All authors have read and approved the published version of the manuscript.
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Nakanishi, H., Takada, A., Yoneyama, K. et al. Simplified detection of the species of origin of antler velvets using single-stranded tag hybridization chromatographic printed-array strip. J Nat Med 77, 998–1004 (2023). https://doi.org/10.1007/s11418-023-01734-6
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DOI: https://doi.org/10.1007/s11418-023-01734-6