鲁棒性chlorzoxazone作为体内的细胞色素P450 2 e1活动。

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约翰森Ernstgard L, Warholm M G

鲁棒性chlorzoxazone作为体内的细胞色素P450 2 e1活动。

Br中国新药杂志。2004年8月,58 (2):190 - 200。

PubMed ID
15255802 (在PubMed
]
文摘

目的:Chlorzoxazone代谢的细胞色素P450 2 e1 (CYP2E1)一个氧化代谢物,6-hydroxychlorzoxazone。这项研究的目的是测试的健壮性chlorzoxazone CYP2E1的体内探针在人类活动,强调调查短期和长期的自身内在可变性和不同剂量的药物的影响。此外,影响身体的构建、药物代谢酶基因型,血液采样时间,最近的温和酒精摄入量进行调查。方法:6-hydroxychlorzoxazone: chlorzoxazone(代谢)比在等离子体测量2 h后28男9女志愿者单剂量口服500毫克chlorzoxazone。同样,代谢率在4 h和6 h测量20的男性。代谢率在2 h也决定1.5和2.5在13年后,七雄,分别为3周和每周七雄,500毫克的剂量后,一旦在高(750毫克)和低剂量(250毫克),一旦(500毫克)后适度摄入乙醇(0.5 g千克(1)体重)晚上前。为CYP2E1基因型测定N-acetyltransferase 2以及谷胱甘肽转移酶M1。结果:排除局外人(比= 1.6)的代谢率2 h范围从0.12到0.61 (n = 36)。与体重正相关(r = 0.61, P < 0.001)建议chlorzoxazone代谢存在剂量依赖的相关性。代谢率随chlorzoxazone剂量增加而降低(P = 0.01),再次表明代谢存在剂量依赖的相关性。 Long-term (yearly intervals) and short-term (weekly intervals) intra- and interindividual variabilities in metabolic ratio were similar (30% and 63%vs 28% and 54%, respectively). Both inter- and intra-individual variabilities tended to decrease with increasing dose of chlorzoxazone. There was no significant influence of moderate ethanol intake the preceding evening, or of CYP2E1 genotype on the metabolic ratio. CONCLUSIONS: The relatively low intra-individual variability in the metabolism of chlorzoxazone suggests that a single-sample procedure may suffice to assess CYP2E1 activity in vivo. However, chlorzoxazone metabolism is dose-dependent at commonly used doses and it is therefore advisable to adjust the dose for body weight. Moderate intake of ethanol the preceding evening did not significantly affect the chlorzoxazone metabolic ratio.

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药物酶
药物 生物 药理作用 行动
Chlorzoxazone 细胞色素P450 2 e1 蛋白质 人类
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底物
抑制剂
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