Gas Chromatographic/Mass Spectrometric Analysis of Oxo and Chain-shortened Leukotriene B4 Metabolites. Leukotriene B4 Metabolism in Ito Cells
作者:Pat Wheelan、Robert C. Murphy、Francis R. Simon
DOI:10.1002/(sici)1096-9888(199603)31:3<236::aid-jms293>3.0.co;2-u
日期:1996.3
15-tetrahydro-LTB4. Formation of the intermediate metabolites, 12-oxo-10,11-dihydro-LTB4 and 12-oxo-10,11,14,15-tetrahydro-LTB4, was also observed. GC/electron impact (EI) MS analysis of the 12-oxo metabolites, derivatized as the pentafluorobenzyl ester/ trimethylsilyl ether compounds, resulted in unique fragmentations indicative of the oxo substituent and double bond positions. Further metabolism of 10,11-dihydro-LTB4
通过气相色谱/质谱(GC / MS)分析白三烯B4(LTB4)与Ito细胞孵育后形成的衍生代谢产物,扩展了有关衍生化羟基取代不饱和脂肪酸裂解机制的先前知识。LTB4被大鼠Ito细胞(一种肝窦窦星状细胞)通过delta 10-和delta 14-还原酶途径代谢,从而形成10,11-dihydro-LTB4和10,11,14,15-tetrahydro-LTB4 。还观察到中间代谢产物12-氧代-10,11-二氢-LTB4和12-氧代10,11,14,15-四氢-LTB4的形成。对作为五氟苄基酯/三甲基甲硅烷基醚化合物衍生的12-氧代代谢产物的GC /电子冲击(EI)MS分析导致了独特的断裂,表明了氧代取代基和双键位置。10,11-二氢-LTB4和10,11,14,15-四氢-LTB4通过羧基末端β-氧化的进一步代谢导致链缩短的单羟基代谢物。导致该LTB4失去原始C-5羟基取代基的新陈代谢中可能的中间体被鉴定为含2