~(125)I-rAncrod在大鼠体内的组织分布与代谢

为研究125I-rAncrod(1.59μg·kg-1)在Wistar大鼠器官和组织分布以及粪尿和胆汁的代谢情况,采用放射性125I标记重组安克洛酶(125I-rAncrod)结合分子排阻色谱法(size exclusion chromatography,SEC)及γ-计数法测定不同时间组织及体液样品中125I-rAncrod的含量。结果显示,放射性药物浓度主要累积在甲状腺和胃肠道内,肝肾次之,而脑、脊髓、脂肪、肌肉中药物浓度一直处于较低的水平。Wistar大鼠尾静脉注射125I-rAncrod后,SEC色谱图显示到48h粪尿和胆汁中均检测不到原形药物。结果表明,大鼠尾静脉注射125I-rAncrod后在全身各器官和组织分布广泛,代谢较完全。

Tissue Distribution and Metabolism of 125I-rAncrod in Wistar Rats

To study the tissue distribution and metabolism of radioactivity in rats after single intravenous administration of¹²⁵I-rAncrod（1.59 μg?kg^-1）. The concentration of ¹²⁵I-rAncrod in various tissue and body fluids were determined by¹²⁵I labeled rAncrod combined with size exclusion chromatography （SEC） and γ-counting methods. The concentration of¹²⁵I-rAncrod predominantly accumulated in the thyroid and gastrointestinal and also be found in the kidney and liver in fair amounts, but in brain, spinal cord, muscle and fat was at a very low level. After single intravenous administration (chemical dose 1.59 μg?kg^-1) of¹²⁵I-rAncrod to Wistar rats, the samples of feces, urine and bile were analyzed by SEC. The result was that parent drug was not existed in feces, urine and bile in 48 h. The results showed that¹²⁵I-rAncrod was distributed widely in rats, metabolic process was complete.