Rhizoma Menispermi, derived from the rhizoma of Menispermum dauricum DC., is one of the most popular Chinese medicines. However Rhizoma Menispermi is often illegally mixed with other species in the herbal market, incl...Rhizoma Menispermi, derived from the rhizoma of Menispermum dauricum DC., is one of the most popular Chinese medicines. However Rhizoma Menispermi is often illegally mixed with other species in the herbal market, including Aristolochia mollissimae Hance, which is toxic to the kidneys and potentially carcinogenic. The use of DNA barcoding to authenticate herbs has improved the management and safety of traditional medicines. In this paper, 49 samples belonging to five species, including 34 samples of M. dauricum, from different locations and herb markets in China were collected and identified using DNA barcoding. The sequences of all 34 samples of Rhizoma Menispermi are highly consistent, with only one site variation in internal transcribed spacer 2 (ITS2) of nuclear ribosomal DNA and no variations in the psbA-trnH region. The intra-specific genetic distance is much smaller than inter-specific one. Phylogenetic analysis shows that both sequences allow the successful identification of all species. Nearest distance and BLAST1 methods for the ITS2 and psbA-trnH regions indicate 100% identification efficiency. Our research shows that DNA barcoding can effectively distinguish Rhizoma Menispermi from its adulterants from both commercial and original samples, which provides a new and reliable way to monitor commercial herbs and to manage the modern medicine market.展开更多
目的建立不同产地北豆根中蝙蝠葛碱含量测定的HPLC方法。方法以C18为色谱柱填充剂,以乙腈-水-三乙胺(45∶55∶0.1)为流动相,检测波长为284 nm,流速为1.0 m L/min,柱温为30℃,建立8批不同来源的北豆根HPLC图。结果建立了检测北豆根的HPL...目的建立不同产地北豆根中蝙蝠葛碱含量测定的HPLC方法。方法以C18为色谱柱填充剂,以乙腈-水-三乙胺(45∶55∶0.1)为流动相,检测波长为284 nm,流速为1.0 m L/min,柱温为30℃,建立8批不同来源的北豆根HPLC图。结果建立了检测北豆根的HPLC条件,在20~100μg/m L范围内,对照品进样量与峰面积呈良好的线性关系(r=0.999 5),蝙蝠葛碱的平均回收率为100.30%,RSD=1.000%。不同来源的北豆根中蝙蝠葛碱含量不同。结论本研究建立的HPLC方法灵敏,准确度、精密度、重复性好,操作简便,可作为北豆根中蝙蝠葛碱含量的检测方法。展开更多
文摘Rhizoma Menispermi, derived from the rhizoma of Menispermum dauricum DC., is one of the most popular Chinese medicines. However Rhizoma Menispermi is often illegally mixed with other species in the herbal market, including Aristolochia mollissimae Hance, which is toxic to the kidneys and potentially carcinogenic. The use of DNA barcoding to authenticate herbs has improved the management and safety of traditional medicines. In this paper, 49 samples belonging to five species, including 34 samples of M. dauricum, from different locations and herb markets in China were collected and identified using DNA barcoding. The sequences of all 34 samples of Rhizoma Menispermi are highly consistent, with only one site variation in internal transcribed spacer 2 (ITS2) of nuclear ribosomal DNA and no variations in the psbA-trnH region. The intra-specific genetic distance is much smaller than inter-specific one. Phylogenetic analysis shows that both sequences allow the successful identification of all species. Nearest distance and BLAST1 methods for the ITS2 and psbA-trnH regions indicate 100% identification efficiency. Our research shows that DNA barcoding can effectively distinguish Rhizoma Menispermi from its adulterants from both commercial and original samples, which provides a new and reliable way to monitor commercial herbs and to manage the modern medicine market.
