Provided are novel superoxide dismutase derivatives represented by the following general formula (I) ##STR1## wherein [SOD] is a superoxide dismutase residue derived by removal of two mercapto groups, and W is a divalent long chain hydrocarbon residue which may optionally be interrupted by one or more groups each independently selected from the group consisting of an oxygen atom, a sulfur atom and a group of -N(R)- (R being a lower alkyl group). The SOD derivatives retain most of the enzymatic activities of unmodified SOD and have much longer plasma half-life than unmodified SOD. They are effective for treating various diseases caused by active oxygen species. Also provided are chemical modifiers to prepare the above SOD derivatives.
提供了以下通式(I)所代表的新型超氧化物歧化酶衍
生物:
##STR1##
其中[SOD]是通过去除两个巯基基团得到的超氧化物歧化酶残基,W是一种二价长链烃基残基,可以选择性地被一个或多个基团中断,每个基团都是从氧原子、
硫原子和-N(R)-(R为低碳基)的群组中独立选择的。SOD衍
生物保留了大部分未改性SOD的酶活性,并且比未改性SOD具有更长的血浆半衰期。它们可用于治疗由活性氧物种引起的各种疾病。还提供了
化学修饰剂来制备上述SOD衍
生物。