Lipase-catalyzed preparation of optically active 1′-acetoxychavicol acetates and their structure–activity relationships in apoptotic activity against human leukemia HL-60 cells
作者:Hideki Azuma、Keita Miyasaka、Tsuyoshi Yokotani、Taro Tachibana、Akiko Kojima-Yuasa、Isao Matsui-Yuasa、Kenji Ogino
DOI:10.1016/j.bmc.2005.10.029
日期:2006.3
HL-60 cells were investigated using optically active ACA and various racemic ACA analogues. Natural-type (or with different acyl group) ACA showed a high apoptotic activity, but the ortho or meta isomers, 4-deacetoxy analogue, and the 2'-3' dehydrogenated derivative had no effect, or a weak activity. Optically active (R)- and (S)-ACA were prepared by a lipase-catalyzed esterification. Using a mixture of
使用旋光性ACA和各种外消旋ACA类似物研究了1'-乙酰氧基甲氧乙酸乙酸酯(ACA)对人白血病HL-60细胞凋亡活性的结构-活性关系。天然型(或带有不同酰基的)ACA具有较高的凋亡活性,但邻位或间位异构体,4-脱乙酰氧基类似物和2'-3'脱氢衍生物没有作用,或活性较弱。通过脂肪酶催化的酯化反应制备旋光的(R)-和(S)-ACA。在回流温度下使用乙酸乙烯酯-四氢呋喃的混合物(1:1v / v)作为溶剂,获得光学纯的(R)-和(S)-ACA(分别为99.7%ee和99.1%ee)。通过MTT分析和检测典型的凋亡现象(DNA片段化,caspase-3激活和PARP裂解)和这两个活性几乎相等。这些结果表明,ACA对HL-60细胞具有凋亡活性的基本部分是4-乙酰氧基和C-2'和C-3'之间的不饱和双键的存在,以及在1处的构型。 '-位置与活动无关。