代谢
酮体在体内不易被代谢。大多数较低酮体中,多达50%的剂量可能以不变的形式从体内排出,主要在呼出的气体中,以及在较小程度上在尿液中。酮体的主要代谢途径是还原为相应的二级醇,这些二级醇通常以葡萄糖醛酸的形式排出。在大鼠中,38-54%的1000 mg/kg bw甲基异丙酮剂量在大约25-35小时内以不变的形式排出,主要在呼出的气体中。将这种酮体给予兔子增加了葡萄糖醛酸的排出量。有人提出,MIPK是人体尿液的正常成分。
Ketones are not readily metabolized in the body. With most of the lower ketones as much as 50% of the dose may be eliminated unchanged from the body, mainly in the exhaled air and to a small extent in the urine. The major metabolic pathway of ketones is reduction to the corresponding secondary alcohols, which are usually eliminated as glucuronic acids. In rats, 38-54% of a dose of 1000 mg/kg bw methyl isopropyl ketone was eliminated unchanged in about 25-35 hours, mainly in the expired air. Administration of this ketone to rabbits increased the glucuronic acid output. It has been suggested that MIPK is a normal constituent of human urine.
来源:Hazardous Substances Data Bank (HSDB)