科研之友
微信
新浪微博
Facebook
分享链接
摘要
Herein, novel multi-responsive injectable polyester hydrogels were reported based on the diselenide-containing poly(Ε-caprolactone) copolymers ((mPEG-PCL-Se)2). The (mPEG-PCL-Se)2solution remained a free-flowing state at ambient temperature but spontaneously turned into a semisolid hydrogel upon heating to physiologic temperature. The phase transition temperature was examined to be dependent on the composition and aqueous concentration of the copolymers. More importantly, the thermo-responsive hydrogels were endowed with oxidation and reduction-triggered degradation by the incorporation of diselenide groups. Accordingly, the degradation of poly(Ε-caprolactone)-based hydrogels was greatly improved and the rate of degradation was well regulated by the concentration of hydrogen peroxide (H2O2) or glutathione (GSH). This superior stimuli-responsive degradation could lead to an enhanced drug release of encapsulated drug (Doxorubicin, DOX). Thus the oxidation and reduction-triggered degradable diselenide-containing poly(Ε-caprolactone) hydrogels would offer great potential for the controlled drug delivery.
