Metabolism of 27-nor-24,25-dihydrolanosterol and 23,24,25,26,27-pentanor-dihydrolanosterol by rat liver hommogenate preparations.
作者:YOSHIHIRO SATO、YOSHIKO SONODA
DOI:10.1248/cpb.30.628
日期:——
The metabolism of 27-nor-24, 25-dihydrolanosterol (1) which is an effective inhibitor of cholesterol biosynthesis from lanosterol was studied using the unlabeled and 24, 25-tritiated compounds. 1 was transformed into the cholesterol analog, 27-norcholesterol, to the extent of 6.5% by incubation with rat liver homogenate under conditions such that lanosterol in the control experiment was converted to cholesterol to the extent of 24.8%. The structures of two other metabolites (9 and 11) were determined. On the other hand, 23, 24, 25, 26, 27-pentanordihydrolanosterol (2), which is also an inhibitor, was not transformed into the corresponding cholesterol analog, suggesting the importance of the side chain structure of lanosterol in cholesterol biosynthesis.
研究了27-去甲-24, 25-二氢兰斯特醇(1)的代谢,该化合物是从兰斯特醇合成胆固醇的有效抑制剂,使用了未标记和24, 25-氚标记的化合物。1在与大鼠肝脏匀浆孵育的条件下,转化为胆固醇类似物27-去胆固醇的程度为6.5%,而对照实验中兰斯特醇转化为胆固醇的程度为24.8%。另外两个代谢产物(9和11)的结构也被确定。另一方面,23, 24, 25, 26, 27-戊去二氢兰斯特醇(2)作为抑制剂,并未转化为相应的胆固醇类似物,这表明兰斯特醇的侧链结构在胆固醇生物合成中的重要性。