中药生物药剂学分类系统(biopharmaceutics classification system of Chinese materia medica,CMMBCS)中的渗透性评价,需多成分作为整体来开展研究,即使在研究具体某一成分时,也应将其放在多成分环境中审视。该实验以此为原则,将葛根...中药生物药剂学分类系统(biopharmaceutics classification system of Chinese materia medica,CMMBCS)中的渗透性评价,需多成分作为整体来开展研究,即使在研究具体某一成分时,也应将其放在多成分环境中审视。该实验以此为原则,将葛根芩连汤中的高含量成分作为多成分环境影响因素,考察葛根素的肠渗透性,运用在体肠单向灌流模型,对葛根素肠渗透性的相关参数进行测定,评价其他高含量成分对其肠渗透性的影响。实验结果表明不同比例的黄芩苷、甘草酸和小檗碱对葛根素的肠渗透性均有一定的影响,甘草酸能显著抑制葛根素的肠吸收,高浓度小檗碱会促进葛根素的吸收。该研究结果表明中药生物药剂学分类系统的渗透性评价充分考虑多成分环境中其他成分的影响是重要的研究思想。展开更多
AIM: To investigate the absorption characteristics of the total alkaloids from Mahoniae Caulis(TAMC) through the administration of monterpene absorption enhancers or protein inhibitors. METHOD: The absorption behavior...AIM: To investigate the absorption characteristics of the total alkaloids from Mahoniae Caulis(TAMC) through the administration of monterpene absorption enhancers or protein inhibitors. METHOD: The absorption behavior was investigated in an in situ single-pass intestinal perfusion(SPIP) assay in rats. RESULTS: The intestinal absorption of TAMC was much more than that of a single compound or a mixture of compounds(jatrorrhizine, palmatine, and berberine). Promotion of absorption by the bicyclic monoterpenoids(borneol or camphor) was higher than by the monocyclic monoterpenes(menthol or menthone), and promotion by compounds with a hydroxyl group(borneol or menthol) was higher than those with a carbonyl group(camphor or menthone). The apparent permeability coefficient(Papp) of TAMC was increased to 1.8-fold by verapamil, while it was reduced to one half by thiamine. The absorption rate constant(Ka) and Papp of TAMC were unchanged by probenecid and pantoprazole. CONCLUSION: The intestinal absorption characteristics of TAMC might be passive transport, and the intestinum tenue was the best absorptive site. In addition, TAMC might be likely a substrate of P-glycoprotein(P-gp) and organic cation transporters(OCT), rather than multidrug resistance protein(MRP) and breast cancer resistance protein(BCRP). Compared with a single compound and a mixture of compounds, TAMC was able to be absorbed in the blood circulation effectively.展开更多
文摘中药生物药剂学分类系统(biopharmaceutics classification system of Chinese materia medica,CMMBCS)中的渗透性评价,需多成分作为整体来开展研究,即使在研究具体某一成分时,也应将其放在多成分环境中审视。该实验以此为原则,将葛根芩连汤中的高含量成分作为多成分环境影响因素,考察葛根素的肠渗透性,运用在体肠单向灌流模型,对葛根素肠渗透性的相关参数进行测定,评价其他高含量成分对其肠渗透性的影响。实验结果表明不同比例的黄芩苷、甘草酸和小檗碱对葛根素的肠渗透性均有一定的影响,甘草酸能显著抑制葛根素的肠吸收,高浓度小檗碱会促进葛根素的吸收。该研究结果表明中药生物药剂学分类系统的渗透性评价充分考虑多成分环境中其他成分的影响是重要的研究思想。
基金supported by China Pharmaceutical University Training Programs of Innovation for Undergraduates(No.02640390)
文摘AIM: To investigate the absorption characteristics of the total alkaloids from Mahoniae Caulis(TAMC) through the administration of monterpene absorption enhancers or protein inhibitors. METHOD: The absorption behavior was investigated in an in situ single-pass intestinal perfusion(SPIP) assay in rats. RESULTS: The intestinal absorption of TAMC was much more than that of a single compound or a mixture of compounds(jatrorrhizine, palmatine, and berberine). Promotion of absorption by the bicyclic monoterpenoids(borneol or camphor) was higher than by the monocyclic monoterpenes(menthol or menthone), and promotion by compounds with a hydroxyl group(borneol or menthol) was higher than those with a carbonyl group(camphor or menthone). The apparent permeability coefficient(Papp) of TAMC was increased to 1.8-fold by verapamil, while it was reduced to one half by thiamine. The absorption rate constant(Ka) and Papp of TAMC were unchanged by probenecid and pantoprazole. CONCLUSION: The intestinal absorption characteristics of TAMC might be passive transport, and the intestinum tenue was the best absorptive site. In addition, TAMC might be likely a substrate of P-glycoprotein(P-gp) and organic cation transporters(OCT), rather than multidrug resistance protein(MRP) and breast cancer resistance protein(BCRP). Compared with a single compound and a mixture of compounds, TAMC was able to be absorbed in the blood circulation effectively.
