代谢
The metabolism and disposition of (14)C-labelled 2,2',4,4'-tetrabromodiphenyl ether (BDE47) were investigated in F344 rats and B6C3F1 mice. Approximately 75-85% of 1 umol BDE47 per kg was absorbed following oral administration to either rats or mice. Sex and species differences were observed in tissue distribution and excretion of BDE47-derived radioactivity. Absorption and distribution of (14)C to major tissues were dose-proportional in male rats from 0.1 to 1,000 umol per kg. BDE47-derived radioactivity increased in all rat and mouse tissues examined following repeated daily doses of 1 umol per kg. Accumulation of (14)C in tissues of mice was less than in corresponding rat tissues. Glutathione conjugates of BDE47 were excreted in rat bile. A glucuronide and a sulfate conjugate of 2,4-dibromophenol were detected in the urine of BDE47-treated rats. BDE47 appears to induce its own metabolism. Increased formation of reactive metabolites over time may correlate with toxicological effects in BDE47-treated rodents.
**Translation:**
对F344大鼠和B6C3F1小鼠进行了(14)C标记的2,2',4,4'-四溴联苯醚(BDE47)的代谢和处置研究。大约有75-85%的每公斤1微摩尔BDE47在口服给药到大鼠或小鼠后会被吸收。在大鼠和小鼠的组织分布和排泄BDE47来源的放射性方面观察到了性别和种类的差异。在0.1到1000微摩尔每公斤的剂量范围内,(14)C在雄性大鼠的主要组织中的吸收和分布与剂量成正比。在连续每日给予1微摩尔每公斤的BDE47后,检查的大鼠和小鼠的所有组织中BDE47来源的放射性都有所增加。小鼠组织中(14)C的积累小于相应的大鼠组织。BDE47的谷胱甘肽结合物在大鼠胆汁中排泄。在大鼠尿液中检测到了2,4-二溴酚的葡萄糖醛酸苷和硫酸盐结合物。BDE47似乎能诱导其自身的代谢。随着时间的推移,反应性代谢物的形成增加可能与BDE47处理的老鼠的毒理学效应有关。
The metabolism and disposition of (14)C-labelled 2,2',4,4'-tetrabromodiphenyl ether (BDE47) were investigated in F344 rats and B6C3F1 mice. Approximately 75-85% of 1 umol BDE47 per kg was absorbed following oral administration to either rats or mice. Sex and species differences were observed in tissue distribution and excretion of BDE47-derived radioactivity. Absorption and distribution of (14)C to major tissues were dose-proportional in male rats from 0.1 to 1,000 umol per kg. BDE47-derived radioactivity increased in all rat and mouse tissues examined following repeated daily doses of 1 umol per kg. Accumulation of (14)C in tissues of mice was less than in corresponding rat tissues. Glutathione conjugates of BDE47 were excreted in rat bile. A glucuronide and a sulfate conjugate of 2,4-dibromophenol were detected in the urine of BDE47-treated rats. BDE47 appears to induce its own metabolism. Increased formation of reactive metabolites over time may correlate with toxicological effects in BDE47-treated rodents.
来源:Hazardous Substances Data Bank (HSDB)