~3H-去甲斑蝥素小鼠体内药代动力学与组织分布  

Pharmacokinetics and biodistribution of ~3H-norcantharidin in mice

作　　者：魏春敏[1] 王本杰[1] 马娅[2] 孙自平[2] 李小利[1] 郭瑞臣[1] 

机构地区：[1]山东大学齐鲁医院临床药理研究所,山东济南250012 [2]山东省医学科学院放射研究所,山东济南250012

出　　处：《药学学报》2007年第5期516-519,共4页Acta Pharmaceutica Sinica

摘　　要：健康小鼠灌服3H-去甲斑蝥素溶液,收集不同时间血、组织、尿和粪,采用氚标记示踪法测定放射活性,计算3H-去甲斑蝥素血浓度、单位组织放射活性及尿和粪累积排泄率,DAS软件拟合小鼠去甲斑蝥素药代动力学模型,计算其药代动力学参数,评价3H-去甲斑蝥素小鼠体内的吸收、分布及排泄过程。结果表明,小鼠灌服3H-去甲斑蝥素0.5 h后血中放射活性达峰值;15 min后小肠、胆囊、胃、肾上腺、肾脏、心脏、子宫等放射活性较高,此后逐渐降低,但3 h后胆囊、肾上腺、子宫放射活性仍较高,肾脏、肝脏等组织则较低;24 h后粪便和尿液累积排泄率分别为65.40%和1.33%。因此,小鼠口服3H-去甲斑蝥素吸收迅速,血中分布明显高于其他组织;胆囊、肾上腺、子宫分布多且持久,肝脏分布少且消除快,肾脏则分布多,但消除也快。3H-去甲斑蝥素主要经肾脏排泄,极少量经粪便排泄。由于所测放射活性为去甲斑蝥素原形及代谢物之和,应对其体内转化过程及可能代谢产物做进一步研究。A single dose of ^3H-norcantharidin solution was intragastrically given, blood, tissues, urine and feces were collected as scheduled, and radioactivity in these samples was determined by tritium tracing method to investigate the pharmacokinetics, tissue distribution and excretion of norcantharidin in Kunming mice. The pharmacokinetic characteristics of norcantharidin were evaluated by DAS version 2.0. The blood concentration reached to maximum 0.5 h after intragastric administration. The radioactivity in tissues was high in small intestine, gallbladder, stomach, adrenal gland, kidney, heart and uterus 15 minutes after administration, descending with time, and high in gallbladder, adrenal gland and uterus 3 hours post dosing. The 24 h accumulative excretion ratio of urine and feces were 65.40% and 1.33% , respectively. ^3H-norcantharidin was easily absorbed after orally given to mice, the radioactivity was high and existed for a long-time in gallbladder, adrenal gland and uterus, and low but also existed for a longtime in large intestine, thymus and fat tissue. ^3H-norcantharidin was declined quickly in small intestine, stomach, kidney and heart, and occurred rarely in brain. Norcantharidin was excreted mainly by urinary route and seldom in feces, which may be the cause of the urinary stimulation side effects observed. Because the radioactivity measured were the sum of ^3H labeled norcantharidin and its metabolites, further studies on the disposition of norcantharidin in mammal animals, on the separation or identification of metabolites and, if any, on their activities, are fairly needed.

关 键 词：去甲斑蝥素 药代动力学 生物分布 氚 累积排泄速军 

分 类 号：R917[医药卫生—药物分析学] R696.11[医药卫生—药学]