Inhibitory Effect of Perillosides A and C, and Related Monoterpene Glucosides on Aldose Reductase and Their Structure-Activity Relationships.
作者:Tomoyuki FUJITA、Kumiko OHIRA、Kazutaka MIYATAKE、Yoshihisa NAKANO、Mitsuru NAKAYAMA
DOI:10.1248/cpb.43.920
日期:——
Monoterpene glucosides, perillosides A and C, obtained from the leaves of Perilla frutescens, were found to be inhibitors of aldose reductase (EC 1.1.1.21) which is considered to be a key enzyme in diabetic complications such as cataract. The apparent type of inhibition of rat lens aldose reductase by perillosides A and C was competitive with respect to glyceraldehyde and their Ki values were 1.4×10-4 and 2.3×10-4M, respectively. The type of inhibition by their tetraacetates was non-competitive with respect to the same substrate, although their inhibitory effects were increased by about one order of magnitude compared with those of the perillosides and the Ki values were 2.5×10-5 and 7.1×10-5M, respectively. We also prepared related monoterpene glucosides and their tetraacetates and determined their inhibitory activities towards aldose reductase in order to elucidate the relationship between structure and inhibitory activity.
从紫苏(Perilla frutescens)叶中获得的单萜葡萄糖苷,紫苏苷A和C,被发现是醛糖还原酶(EC 1.1.1.21)的抑制剂,该酶被认为是糖尿病并发症如白内障的关键酶。紫苏苷A和C对大鼠晶状体醛糖还原酶的抑制作用相对于甘油醛是竞争性的,其Ki值分别为1.4×10-4和2.3×10-4M。它们的四乙酸酯对同一底物的抑制类型是非竞争性的,尽管其抑制效果比紫苏苷提高了大约一个数量级,Ki值分别为2.5×10-5和7.1×10-5M。我们还制备了相关的单萜葡萄糖苷及其四乙酸酯,并测定了它们对醛糖还原酶的抑制活性,以便阐明结构与抑制活性之间的关系。