摘要
目的:应用肠外翻模型研究葛根芩连汤及不同配伍组中黄酮类成分在大鼠不同肠段的吸收特征。方法:采用大鼠肠外翻模型,考察葛根芩连汤中黄酮类成分(葛根素、大豆苷、甘草苷、野黄芩苷、黄芩苷、汉黄芩苷)的肠吸收机制以及不同肠段、药物浓度等因素对它们吸收的影响,比较各组分在全方和不同配伍组给药时的吸收变化情况。结果:各成分在不同肠段的吸收均为线性吸收,其R2均大于0.9,符合零级吸收速率。葛根素、大豆苷、甘草苷、野黄芩苷在各肠段的吸收方式除被动扩散外还存在主动转运。黄芩苷、汉黄芩苷的吸收速率常数(Ka)均随剂量的增加而增加,显示它们为被动扩散。肠道不同部位的吸收实验表明,葛根素、大豆苷、野黄芩苷、汉黄芩苷的最佳吸收部位为空肠;甘草苷、黄芩苷的最佳吸收部位为结肠。比较全方及不同配伍组的Ka,葛根素、大豆苷、甘草苷、黄芩苷在全方中吸收较好;葛根芩连组中野黄芩苷、汉黄芩苷在十二指肠的吸收较好,其他肠段则是全方组中的吸收较好。结论:肠囊对各成分的吸收有选择,不同配伍组间各组分的肠吸收有所变化,但在全方中吸收较好。
Objective： Using rat everted gut sacs to investigate the intestinal absorption characteristics of flavones in Gegenqinlian decoction and different compatibilities. Method： In the research, the intestinal absorption mechanism of the active ingredients including puerarin, daidzin, liquiritin, scutellarin, baicalin and wogonoside in Gegenqinlian decoction were studied; and then the influences of different intestinal segments、different drug concentrations on the absorption of ingredients were discussed; finally, the absorption characteristics of the active compounds in different compatibility were also be compared. Result： The absorption mode of the six compounds we disscussed was linearity, R^2〉0.9, which was consistent with the zero order rate process. The mechanism of absorption of puerarin, daidzin, liquiritin and scutellarin across intestinal sacs was passive diffusion, while active transportation was also existed. The Ka of baicalin and wogonoside increased along with the raising dosage, which indicated the passive absorption of the two ingredients. Different parts of the intestinal absorption experiments of Gegenqinlian decoction showed that the best absorption site of puerarin, daidzin and scutellarin was jejunum; liquiritin and baicalin can be absorbed better in colon; and the best absorption part of wogonoside was ileum. In the section of comparing the Ka of different compatibilities, it was founded that the absorption of puerarin, daidzin, liquiritin, baicalin in Gegenqinlian decoction were best; in the four intestinal segments, scutellarin and wogonoside were also absorbed best in Gegenqinlian decoction except for the duodenum where the best compatibility was Gegenqinlian group. Conclusion： For ingerdients, there was selective absorption in intestinal sacs. The intestinal absorption characteristics of each component in different compatibilities were different, however, the Gegenqinlian decoction was the optimal.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2011年第23期3332-3337,共6页
China Journal of Chinese Materia Medica
基金
上海市教育委员会科研创新重点项目(11ZZ110)
上海市教育委员会科研创新面上项目(11YZ69)
高等学校博士点专项科研基金项目(20093107110011)
关键词
肠外翻
葛根芩连汤
配伍
黄酮
everted gut sacs
Gegenqinlian decoction
compatibility
flavone
