Metabolism of fentanyl in isolated hepatocytes from rat and guinea pig.
作者:TSUYOSHI GOROMARU、MASATAKA KATASHIMA、HIROSHI MATSUURA、NOZOMU YOSHIMURA
DOI:10.1248/cpb.33.3922
日期:——
The metabolites of fentanyl (FT) were identified in isolated rat and guinea pig hepatocytes by gas chromatography-mass spectrum (GC-MS) combined with the stable isotope tracer technique. Isolated hepatocytes were prepared by the collagenase perfusion method and were incubated with a 0.3mM equimolar mixture of FT and FT-d5 citrate in a rotating round-bottomed flask at 37°C. The metabolites were extracted with chloroform. The extracts were subjected to GC and GC-MS after trimethylsilylation. Characteristic doublet peaks in the mass spectra indicated the presence of 6 and 7 metabolites in rat and guinea pig hepatocytes, respectively. 4-(N-Propionylanilino) piperidine was identified as the main metabolite in both species. Other metabolites were oxidation products of the phenethyl, piperidine and propionyl groups of FT. Oxidation of the anilino ring and hydrolysis of the amide bond were not found in hepatocytes.
通过气相色谱-质谱(GC-MS)结合稳定同位素示踪技术,鉴定了大鼠和豚鼠离体肝细胞中芬太尼(FT)的代谢物。离体肝细胞采用胶原酶灌注法制备,并与 0.3mM 等摩尔 FT 和柠檬酸 FT-d5 混合物在 37°C 旋转圆底烧瓶中培养。代谢物用氯仿提取。提取物经三甲基硅烷化后进行气相色谱和气相色谱-质谱分析。质谱中的特征性双峰表明,在大鼠和豚鼠肝细胞中分别存在 6 种和 7 种代谢物。在这两个物种中,4-(N-丙酰基苯胺基)哌啶被确定为主要代谢物。其他代谢物是 FT 的苯乙基、哌啶基和丙酰基的氧化产物。在肝细胞中未发现苯胺基环的氧化和酰胺键的水解。