Isolation, Structure Elucidation, Total Synthesis, and Evaluation of New Natural and Synthetic Ceramides on Human SK-MEL-1 Melanoma Cells
作者:Francisco León、Ignacio Brouard、Augusto Rivera、Fernando Torres、Sara Rubio、José Quintana、Francisco Estévez、Jaime Bermejo
DOI:10.1021/jm0605334
日期:2006.9.1
Two new long-chain ceramides, trametenamides A (1) and B (2), were isolated from the methanolic extract of the fruiting body of the fungus Trametes menziesii. The structures were elucidated by spectroscopic analyses and chemical transformations, and the absolute stereochemistry of trametenamide B (2) was determined by stereoselective total synthesis of four possible diastereomers. The acetyl derivative
从真菌Trametes menziesii子实体的甲醇提取物中分离出两种新的长链神经酰胺,即曲脑酰胺A(1)和B(2)。通过光谱分析和化学转化阐明了结构,并通过四种可能的非对映异构体的立体选择性全合成确定了曲贝酰胺B(2)的绝对立体化学。天然神经酰胺(1a)和合成神经酰胺(24-27)的乙酰基衍生物对人黑素瘤细胞系SK-MEL-1具有细胞毒性,这是由DNA片段化检测到的凋亡诱导所引起的,聚(ADP-核糖) )聚合酶裂解,以及procaspase-9和-8加工。