摘要
Glucose oxidase(GOx)-based starvation therapy has emerged as a promising strategy in tumor therapy.However,the non-specific catalytic activity and premature degradation of GOx during systemic circulation have limited its therapeutic efficacy in tumor regions.In this study,we present the synthesis of ultrasound/glutathione dual-responsive ZIF-8-GOx@copper-polydopamine@liposome-L-arginine(ZGCLL)nanoparticles,designed to concurrently achieve ion interference therapy,starvation therapy,and ultrasound-catalyzed gas therapy.The ZIF-8-GOx nanoparticles are prepared via a co-precipitation method,followed by the encapsulation of a copper-polydopamine(Cu-PDA)shell on the particle surface.Subsequently,liposomes and L-arginine are incorporated to form ZGCLL.The Cu-PDA shell exhibits responsiveness to the elevated level of glutathione in tumor microenvironment,leading to its degradation,mitigating the risk of unintended degradation and“off-target”effect of GOx in normal tissues.The exposure of ZIF-8 results in zinc overload and activates the catalytic reaction of GOx.The consequent depletion of glucose facilitates starvation therapy,while the generated H2O2,in synergy with zinc ions,intensifies oxidative stress.H_(2)O_(2)can produce more potent reactive oxygen species when exposed to ultrasound,which subsequently react with L-arginine to generate higher levels of nitric oxide for gas therapy.Both in vitro and in vivo studies demonstrate that this platform achieves precise and efficient antitumor effects.This research offers an innovative strategy for the development of cascade catalytic reaction systems and targeted therapeutic platforms.
基金
supported by the National Natural Science Foundation of China(No.52172289)
Fundamental Research Funds for the Central Universities,Beijing Life Science Academy(BLSA,No:2023400CA0100)
the Funds of the Natural Science Foundation of Hangzhou under Grant No.2024SZRYBH180004.
