管花肉苁蓉苯乙醇总苷在狗胃肠道内的生物转化

METABOLIC REGULATION OF PHENYLETHANOID GLYCOSIDES FROM ERBA CISTANCHES IN DOGS' GASTROINTESTINE

目的 研究苯乙醇苷类化合物在狗胃肠道内的代谢规律。探讨中药有效部位体内转化的研究方法。方法 用反相HPLC ,对ig苯乙醇总苷的狗粪便中的化合物进行分离 ,并以含量最高的 3个化合物为标准 ,比较不同时间胃肠容物及粪便中的含量。结果 从粪便中分离得到 4个苯乙醇苷类化合物 ,分别为松果菊苷 (echinacoside ,I)、类叶升麻苷 (acteoside ,II)、异类叶升麻苷 (isoacteoside,III)和 2′ 乙酰基类叶升麻苷 ( 2′ acetylacteoside ,IV) ;经HPLC分析发现 ,各成分在胃及小肠运行期间相对比例未发生明显变化 ,但在粪便中变化很大 ,其中松果菊苷由总苷中的4 8 0 %降低到 16 0 % ,而类叶升麻苷由 11 0 %升高为 3 4 7%。结论 苯乙醇苷类成分的代谢主要发生在大肠 。

AIM To study the metabolic process of phenylethanoid glycosides (PhGs) in the gastrointestine of beagle dogs that were administered intragastrially process, and develop some new methods of biopharmacology on the effective position of traditional Chinese medicine. METHODS High performance liquid chromatography was used to purify constituents from faeces and analyze relative contents of the three main compounds in the gastrointestinal tract at different times and in the faeces of dogs. Every sample was collected, extracted with methanol and analyzed with integration. RESULTS Four compounds, based on reference substances, were identified as echinacoside, acteoside, isoacteoside, and 2′ acetylacteoside from extraction of faeces of dogs. Quantitative “with HPLC” analysis reveals that variation of ratios of the three main compounds is not distinct when moving in the gastrointestinal tract 7 h, that is quite different from those in faeces, in which the content of echinacoside fell from 48 0% to 16 0%, and acteoside increased from 11 0% to 34 7%. CONCLUSION PhGs are mainly metabolized in large intestine. Among them, a portion of echinacoside is transformed into aceteoside.