Characterization of brimonidine metabolism with rat, rabbit, dog, monkey and human liver fractions and rabbit liver aldehyde oxidase
作者:A. A. Acheampong、D-S. Chien、S. Lam、S. Vekich、A. Breau、J. Usansky、D. Harcourt、S. A. Munk、H. Nguyen、M. Garst、D. Tang-Liu
DOI:10.3109/00498259609167421
日期:1996.1
1. In vitro metabolism of 14C-brimonidine by the rat, rabbit, dog, monkey and human liver fractions was studied to assess any species differences. In vitro metabolism with rabbit liver aldehyde oxidase and human liver slices, and in vivo metabolism in rats were also investigated. The hepatic and urinary metabolites were characterized by liquid chromatography and mass spectrometry. 2. Up to seven, six
1.研究了大鼠,兔,狗,猴和人肝脏中14C-溴莫尼定的体外代谢作用,以评估任何物种差异。还研究了兔肝醛氧化酶和人肝切片的体外代谢以及大鼠体内的代谢。通过液相色谱和质谱法表征肝和尿代谢产物。2.在大鼠肝S9级分,人肝S9级分,人肝切片和大鼠尿液中分别检测到多达7、6、11和14种代谢物。兔肝醛氧化酶催化溴莫尼定代谢为2-氧代布罗尼定和3-氧代布罗尼定,并进一步氧化为2,3-二氧代布罗尼定。甲萘醌抑制肝脏醛氧化酶介导的氧化。3.溴莫尼定的肝氧化为2-氧代布罗尼定,3-氧代布罗尼定和2 3-dioxobrimonidine是所有研究物种的主要途径,除了狗的主要代谢产物是4',5'-脱氢溴莫尼定和5-bromo-6-胍基喹喔啉。4.这些结果表明溴莫尼定具有广泛的肝代谢作用,并为醛氧化酶参与溴莫尼定代谢提供了证据。肝溴莫尼定代谢中的物种差异可能与狗肝醛氧化酶的低活性有关。溴莫尼定的主要代谢途径是α(N)-氧化为2