Absorption, excretion, distribution and metabolism of perisoxal in rats.
作者:JUN WATANABE、HIROSHI OKABE、KENJI MIZOJIRI、YOSHITSUGU NAKAJIMA、KOICHI SUGENO、RYUICHI YAMAMOTO
DOI:10.1248/cpb.27.1075
日期:——
The drug was well absorbed from the intestinal tract, and the bulk of it was excreted in the urine and feces. Biliary excretion was significant, and the existence of enterohepatic circulation was considered likely. After intravenous injection, elimination of radioactivity from the blood and various tissues, except for fat, was rapid for 2 hr, then became slower. Elimination of unchanged drug from the blood was very fast. Repeated oral doses did not changed the excretion and distribution features as compared to a single oral dose. Significant accumulation of radioactivity was not caused by repeated doses of 14C-labeled perisoxal. Three oxidized metabolites, p-hydroxyperisoxal, m-hydroxyperisoxal and 4-hydroxyperisoxal, were identified. Excretion of hydroxyperisoxals in the urine (free and conjugates) was greater than that of perisoxal itself.
药物从肠道吸收良好,大部分通过尿液和粪便排出。胆汁排泄显著,肠肝循环的存在被认为是可能的。静脉注射后,血液和除脂肪外的各种组织中的放射性物质在2小时内迅速消除,然后速度变慢。未改变的药物从血液中消除的速度非常快。与单次口服剂量相比,多次口服剂量不会改变排泄和分布特征。多次服用14C标记的过氧化氢不会导致放射性物质大量累积。确定了三种氧化代谢产物:对羟基过氧化氢、间羟基过氧化氢和4-羟基过氧化氢。尿液中羟基过氧化氢(游离和结合)的排泄量大于过氧化氢本身。