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高效液相色谱—电喷雾质谱分析白杨素在大鼠体内的代谢产物

2016-10-19刘炜姜金生韦英杰

中国医药导报 2016年7期

刘炜 姜金生 韦英杰

[摘要] 目的 探讨白杨素在大鼠体内的代谢产物。 方法 给药组以白杨素2 mg/mL的溶液灌胃雄性SD大鼠,同时空白组大鼠以等体积的溶剂灌胃。灌胃24 h后分别取两组大鼠的尿液和粪便,同时分别于给药后0.5、1、2、4、6 h对两组大鼠进行眼眶取血。应用液质联用推测化合物的可能结构。 结果 在大鼠尿、粪便、血浆检测到原型成分白杨素M1(白杨素),在大鼠粪、胆汁中检测到M2(白杨素硫酸结合物);此外,在大鼠尿液、血、胆汁等样品中检测到代谢成分M3-M4(白杨素葡萄糖醛酸结合物)。 结论 白杨素在大鼠体内的主要代谢方式为Ⅱ相代谢,产物是葡萄糖醛酸结合物与硫酸结合物。

[关键词] 白杨素;代谢;大鼠;LC-MS

[中图分类号] R969.1 [文献标识码] A [文章编号] 1673-7210(2016)03(a)-0028-04

Metabolites analysis of chrysin in rat by high performance liquid chromatography–electrospray mass spectrometry

LIU Wei1,2 JIANG Jinsheng3 WEI Yingjie2,3

1.Jiangsu Province Hospital of TCM, the Affiliated Hospital of Nanjing University of TCM, Jiangsu Province, Nanjing 210029, China; 2.School of Pharmacy, Nanjing University of Traditional Chinese Medicine, Jiangsu Province, Nanjing 210023, China; 3.Key Laboratory of Oral Drug Delivery System of Chinese Meteria, Medica of State Administration of Traditional Chinese Medicine, Jiangsu Branch of China Academy of Chinese Medical Science, Jiangsu Province, Nanjing 210000, China

[Abstract] Objective To study the metabolism of chrysin in rats. Methods Drug group was given intragastric administration with chrysin solution 2 mg/mL, at the same time blank group was given intragastric administration with equal volume of solvent. Urine and feces of the two groups were taken after all rats were administered 24 hours later, at the same time at half an hour, 1 hour, 2 hours, 4 hours, 6 hours of the medicine given, all rats were performed orbital blood. Through LC-MS, according to the information, the possible structures of the compounds were speculated. Results In rat urine, feces and plasma, prototype components chrysin M1 was detected, M2 was detected in fecal bile (chrysin sulfate conjugates); in addition, M3-M4 metabolites were detected in rat urine, blood and bile samples (chrysin glucuronide). Conclusion The main metabolism method of chrysin in rats is phase Ⅱ metabolism, the metabolites are glucuronic acid conjugate and sulfuric acid conjugate.

[Key words] Chrysin;Metabolism;Rat;High performance liquid chromatography—electrospray mass spectrometry

白楊素(chrysin)(图1),是一种具有广泛药理活性的黄酮类化合物。白杨素的化学名为5,7-二羟基黄酮[1]。白杨素具有抵抗癌症、降低血压、延缓衰老、扩张血管等药理活性[2-3]。白杨素在体内其5、7位羟基易被糖基化代谢导致活性降低[4-7]。对其结构进行有效修饰,特别是在抗肿瘤方面结构修饰的研究非常活跃[8],对获得高效低毒的新型候选药物具有重要意义。

白杨素由Caco-2和鼠肝细胞代谢为葡萄糖醛酸结合物和硫酸结合物[9-10],文献[11]报道了人口服白杨素400 mg后血浆、尿液和粪样中的代谢产物,结果在血浆中检测到白杨素及白杨素硫酸结合物(chrysin sulphate),硫酸结合物的含量是原型成分的30倍,在尿液中检测到白杨素及白杨素葡萄糖醛酸结合物(chrysin glucuronide),葡萄糖醛酸结合物的量是原型成分的10倍,同时通过对大鼠粪便样品的检测,发现其中含有大量的白杨素;……

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