代谢
二甲基硅基甲基硅酸盐(DMMP)是一种广泛使用的化学物质。二乙基乙基硅酸盐(DEEP)已被提议作为DMMP在多个应用中的替代品。为了进一步研究DMMP和DEEP的毒理学,对这两种化合物的生物转化以及它们在肾脏中诱导α(2u)-珠蛋白积累的能力进行了研究。在雄性和雌性大鼠口服单次剂量50和100 mg/kg后,研究了DMMP和DEEP的生物转化。31P-NMR和GC/MS显示未改变的DMMP随尿液排出;甲基磷酸盐是尿液中唯一识别出的代谢物。未改变的DEEP也随尿液排出;此外,乙基乙基硅酸盐和乙基硅酸盐是尿液中的代谢物。在24小时内,大部分应用的化合物剂量在尿液中回收,表明它们被快速吸收和排出。在代谢物形成或排出的速率上没有观察到性别差异。
Dimethyl methylphosphonate (DMMP) is a widely used chemical. Diethyl ethylphosphonate (DEEP) has been proposed as a replacement for DMMP in several applications. ... To further characterize the toxicology of DMMP and DEEP, ... the biotransformation of these compounds and their ability to induce alpha(2u)-globulin accumulation in kidney /were investigated/. Biotransformation of both DMMP and DEEP were studied in male and female rats after single oral doses of 50 and 100 mg/kg. 31P-NMR and GC/MS showed that unchanged DMMP was excreted with urine; methyl phosphonate was identified as the only metabolite in urine. Unchanged DEEP was also excreted with urine; in addition, ethyl ethylphosphonate and ethylphosphonate were urinary metabolites. The majority of the applied dose of both compounds was recovered in urine within 24 hr indicating rapid absorption and excretion. No sex-differences in rates of formation or excretion of metabolites were seen.
来源:Hazardous Substances Data Bank (HSDB)