蒸三七皂苷类活性组分在大鼠体内代谢产物鉴定的研究

采用超高效液相色谱与串联四极杆飞行时间质谱仪联用技术(UPLC-QTOF-MS/MS)分析大鼠灌胃蒸三七正丁醇部位后所得血液、尿液和粪便样品,获取正负离子模式下样品中化学成分的分析数据。样品数据经Peak View软件处理后,根据原型化合物的结构特征以及体内常见代谢方式的准确质量数变化,对代谢产物进行解析。最终利用代谢物的MS/MS信息鉴定了蒸三七正丁醇部位中的4个皂苷代谢原型,即人参皂苷Rh_4,Rk_3,Rk_1,Rg_5及其15个代谢产物。蒸三七正丁醇部位中4个人参皂苷的代谢途径包括葡萄糖醛酸化、脱糖、硫酸化、脱羟甲基化、支链丢失等。该文从定性角度对蒸三七主要活性皂苷类组分在体内的代谢开展了研究,进一步阐明蒸三七在体内发挥药效的物质基础。

Identification of saponins from Panax notoginseng in metabolites of rats

UPLC-QTOF-MS/MS was used to identify metabolites in rat blood, urine and feces after the administration of n-butanol extract derived from steamed notoginseng. The metabolic process of saponins came from steamed notoginseng was analyzed. The metabolites were processed by PeakView software, and identified according to the structural characteristics of prototype compounds and the accurate qualitative and quantitative changes of common metabolic pathways. Four saponins metabolites were identified based on MS/MS information of metabolites, namely ginsenoside Rh₄, Rk₃, Rk₁, Rg₅,and their 15 metabolites were verified. The metabolic pathways of the four ginsenosides in n-butanol extract included glucuronidation, desugar, sulfation, dehydromethylation, and branch loss. The metabolites of main active saponin components derived from steamed Panax notoginseng were analyzed from the perspective of qualitative analysis. And the material basis for the efficacy of steamed notoginseng was further clarified.