代谢
每组每性别4只大鼠的尿液和粪便混合样本(如下表中的第3、8和9组),接受了单次口服灌胃剂量的[氯苯基-U-14C] NOA446510 300 mg/kg和[甲氧基苯基-U-14C] NOA446510 3 mg/kg及300 mg/kg,对其代谢物/成分进行了评估。此外,每组每性别4只胆管插管大鼠的尿液、粪便和胆汁(第10和11组),接受了单次口服灌胃剂量的[甲氧基苯基-U-14C] NOA446510 3 mg/kg和300 mg/kg,也进行了评估。在报告编号CTL/UR0786/REG/REPT(记录230447)中,3只雄性大鼠的尿液和粪便混合样本在单次口服灌胃3 mg/kg [甲氧基苯基-U-14C] NOA446510后24小时以及连续14次剂量3 mg/kg后24小时,对其代谢物/成分进行了评估。确定了所有主要代谢物/成分,占给药剂量的5%以上(高效液相色谱(HPLC)和质谱(MS))。提出的代谢途径是:失去一个或两个丙炔基团,随后进行葡萄糖醛酸化和O-去甲基化(包括示意图)。两种放射性物种的代谢差异并未表明。在给予高剂量水平(300 mg/kg)的氯苯基和甲氧基苯基放射性形式后,排泄物的代谢轮廓在质量和数量上相似。
单次剂量3 mg/kg [甲氧基苯基-U-14C] NOA446510
雌性大鼠在96小时内通过尿液排出了剂量的46%,通过粪便排出了41%。主要的尿液代谢物(剂量的40%)是NOA458422葡萄糖醛酸苷(NOA458422的O-葡萄糖醛酸苷(2-(4-氯苯基)-N-[2-(4-羟基-3-甲氧基苯基)乙基]-2-丙-2-炔氧基乙酰胺))。在粪便中,NOA446510占剂量的12%,NOA458422占19%。雄性大鼠在96小时内通过尿液排出了剂量的14%,通过粪便排出了72.3%。主要的尿液代谢物(剂量的10%)是SYN534133(CGA 380775的葡萄糖醛酸苷(2-4(氯苯基)-2-羟基-N-[2-(4-羟基-3-甲氧基苯基)乙基]乙酰胺))。在粪便中,NOA458422、原形和NOA458422葡萄糖醛酸苷分别占剂量的29.2%、21.3%和12.9%。
雄性大鼠连续14天每天剂量3 mg/kg [甲氧基苯基-U-14C] NOA446510
排泄物成分轮廓在首次剂量后24小时和14次剂量后相似,并且与上述单次剂量研究的结果一致。
单次剂量300 mg/kg [氯苯基-U-14C] NOA446510
雌性大鼠在96小时内通过尿液排出了剂量的6%,通过粪便排出了81%。NOA458422葡萄糖醛酸苷是主要的尿液代谢物(剂量的3.7%)。NOA446510占雌性大鼠粪便中剂量的75%。雄性大鼠在96小时内通过尿液排出了剂量的2%,通过粪便排出了86%。SYN534133,占剂量的1%,是主要的尿液代谢物。NOA446510占粪便中剂量的79%。
单次剂量300 mg/kg [甲氧基苯基-U-14C] NOA446510
雌性大鼠在96小时内通过尿液排出了剂量的11%,通过粪便排出了82%。尿液和粪便中的主要成分分别是NOA458422葡萄糖醛酸苷(剂量的7%)和NOA446510(剂量的71%)。雄性大鼠在96小时内通过尿液排出了剂量的3%,通过粪便排出了90%。尿液和粪便中的主要成分分别是SYN534133(占剂量的2%)和NOA446510(剂量的73%)。
单次剂量3 mg/kg [甲氧基苯基-U-14C] NOA446510与胆管插管大鼠
在48小时内,雌性大鼠通过尿液排出了剂量的15%,通过胆汁排出了46%,通过粪便排出了22%。尿液和胆汁中的主要成分是NOA458422葡萄糖醛酸苷,分别占剂量的10%和41%。NOA4
Pooled samples of urine and feces from 4 rats per sex per group (Groups 3, 8, and 9 listed in table below) that received a single oral gavage dose of [Chlorophenyl-U-14C] NOA446510 at 300 mg/kg and [methoxyphenyl-U-14C] NOA446510 at 3 and 300 mg/kg were evaluated for metabolites/components. Additionally, urine, feces, and bile from 4 bile duct cannulated rats per sex per group (Groups 10 and 11) that received a single oral gavage dose of [methoxyphenyl-U- 14C] NOA446510 at 3 and 300 mg/kg were evaluated. In Report No. CTL/UR0786/REG/REPT (record 230447), pooled samples of urine and feces from 3 males were evaluated for metabolites/components 24 hours after a single oral gavage dose with 3 mg/kg of [methoxyphenyl-U-14C] NOA446510 and 24 hours after 14 consecutive doses at 3 mg/kg. All major metabolites/components, representing greater than 5% of administered dose were identified (high performance liquid chromatography (HPLC) and mass spectrometry (MS)). The proposed metabolic pathway was described: loss of one or both of the propargyl groups followed by glucuronidation and O-demethylation (a schematic was included). Differences in metabolism of the two radiolabeled species were not indicated. Metabolic profiles of excreta following administration of both the chlorophenyl and methoxyphenyl radiolabeled forms at the high dose level (300 mg/kg) were qualitatively and quantitatively similar. Single Dose of 3 mg/kg [Methoxyphenyl-U-14C] NOA446510 Females excreted 46% of the dose in urine and 41% in feces during 96 hours. The major urinary metabolite (40% of dose) was NOA458422 glucuronide (the O-glucuronide of NOA458422 (2-(4-chloro-phenyl)-N-[2-(4-hydroxy-3-methoxy-phenyl)-ethyl]- 2-prop-2-ynyloxy-acetamide)). In feces, NOA446510 was 12% of dose and NOA458422 was 19%. Males excreted 14% of dose in urine and 72.3% in feces during 96 hours. The major urinary metabolite (10% of dose) was SYN534133 (the glucuronide of CGA 380775 (2-4(chlorophenyl)- 2-hudroxy-N-[2-(4-hudroxy-3-methoxy-phenyl)-ethyl]acetamide)). In feces NOA458422, parent, and NOA458422 glucuronide accounted for 29.2%, 21.3%, and 12.9% of dose respectively. 14 Consecutive Daily Doses in Males at 3 mg/kg [Methoxyphenyl-U-14C] NOA446510 Component profiles of excreta were similar between samples taken 24 hours after the first and 14 doses and consistent with results in the single dose study above. Single Dose of 300 mg/kg [Chlorophenyl-U-14C] NOA446510 Females excreted 6% of dose in urine and 81% of dose in feces during 96 hours. NOA458422 glucuronide was the major urinary metabolite (3.7% of dose). NOA446510 accounted for 75% of dose in feces of females. Males excreted 2% of dose in urine and 86% of dose in feces during 96 hours. SYN534133, at 1% of dose, was the major urinary metabolite. NOA446510 accounted for 79% of dose in feces. Single Dose of 300 mg/kg [Methoxyphenyl-U-14C] NOA446510 Females excreted 11% of dose in urine and 82% of dose in feces during 96 hours. NOA458422 glucuronide (7% of dose) and NOA446510 (71% of dose) were the major components in urine and feces respectively. Males had 3% of dose in urine and 90% of dose in feces during 96 hours. SYN534133, accounting for 2% of dose, and NOA446510 (73% of dose) were the major components in urine and feces respectively. Single Dose of 3 mg/kg [Methoxyphenyl-U-14C] NOA446510 with Bile Duct Cannulated Rats During 48 hours, females excreted 15% of dose in urine, 46% of dose in bile, and 22% of dose in feces. The major component in urine and bile was NOA458422 glucuronide at 10% and 41% of dose respectively. NOA446510 was the major component in feces (22.3% of dose). Males excreted 1%, 73%, and 15% of dose in urine, bile, and feces respectively during 48 hours. NOA458422 glucuronide was the major component in urine (0.7% of dose) and bile (62.2% of dose). NOA446510 accounted for 13% of dose in feces. Single Dose of 300 mg/kg [Methoxyphenyl-U- 14C] NOA446510 with Bile Duct Cannulated Rats 28%, 12%, and 37% of administered radioactivity was excreted by females in urine, bile, and feces respectively during 48 hours. NOA458422 glucuronide was the major component in urine (25% of dose) and bile (10% of dose). NOA446510 accounted for 37% of dose in feces. Males excreted 1% of dose in urine, 28% in bile, and 39% in feces during 48 hours. NOA458422 glucuronide was the major component in urine (0.5% of dose) and bile (22.5% of dose). NOA446510 was 38.6% of dose in feces of males.
来源:Hazardous Substances Data Bank (HSDB)