Quantitative determination of forphenicinol and its metabolites in human serum and urine by gas chromatography/mass spectrometry with selected ion monitoring.
作者:NAOTAKA UCHIYAMA、TERUKAZU TAKANO、SHIZUKO SAITO、HIROAKI MORIKAWA、MASAKATSU OHTAWA
DOI:10.1248/cpb.34.3290
日期:——
A simple and sensitive method for the determination of forphenicinol (L-(3-hydroxy-4-hydroxymethylphenyl)glycine) and its metabolites (M-1-M-5) in human serum and urine has been developed by means of gas chromatography-mass spectrometry with selected ion monitoring.Forphenicinol (FPL) and M-2 (3-hydroxy-4-hydroxymethylbenzylamine) were quantified at the same time as the trimethylsilyl (TMS) derivatives. M-1 (α-(3-hydroxy-4-hydroxymethylphenyl)-α-oxoacetic acid) was methoximated, and then analyzed simultaneously with M-3 (3-hydroxy-4-hydroxymethylbenzoic acid) and M-4 (hydroxyterephthalic acid) after trimethylsilylation. On the other hand, M-5 (L-N-acetyl(3-hydroxy-4-hydroxymethylphenyl)glycine) was hydrolyzed enzymatically with acylase to convert it into FPL and determined as the TMS derivative.In serum, the calibration range for FPL was 0.02-5 μg/ml. As for urine, the calibration curves were linear in the ranges of 0.04-10 μg/ml for FPL, 0.1-10 μg/ml for M-1, M-3, M-4, and M-5, and 0.4-100 μg/ml for M-2.The metabolic fate of FPL in man was investigated after a single oral dose (50 mg) of FPL to each of five healthy volunteers. In the serum, unchanged FPL was found but no metabolites were detected. The serum FPL levels were followed and analyzed pharmacokinetically. In the urine, unchanged FPL and its five metabolites (M-1-M-5) were detected and quantified; M-2 and M-5 were the major urinary metabolites.
通过气相色谱-质谱法,结合选定的离子监测,已经开发出一种简单而灵敏的方法,用于测定人血清和尿液中的福芬那醇(L-(3-羟基-4-羟甲基苯基)甘氨酸)及其代谢产物(M-1-M-5)。福芬那醇(FPL)和M-2(3-羟基-4-羟甲基苄胺)与三甲基硅烷(TMS)衍生物同时定量。M-1(α-(3-羟基-4-羟甲基苯基)-α-氧代乙酸)被甲氧基化,然后与M-3(3-羟基-4-羟甲基苯甲酸)和M-4(羟基对苯二甲酸)一起在三甲基硅烷化后同时分析。另一方面,M-5(L-N-乙酰基(3-羟基-4-羟甲基苯基)甘氨酸)被酰化酶水解,转化为FPL,并作为TMS衍生物测定。在血清中,FPL的校准范围为0.02-5微克/毫升。在尿液中,FPL的校准曲线在0.04-10微克/毫升范围内呈线性,M-1、M-3、M-4