@article{Wang2023, 
author = {Yuqian Wang and Yingjian Huang and Yu Fu and Zhixiong Guo and Da Chen and Fangxian Cao and Qi Ye and Qiqi Duan and Meng Liu and Ning Wang and Dan Han and Chaoyi Qu and Zhimin Tian and Yongquan Qu and Yan Zheng},
title = {Reductive damage induced autophagy inhibition for tumor therapy},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {4},
pages = {5226-5236},
keywords = {CeO2, reductive damage, autophagy inhibitor, tumor therapy, reactive oxygen species},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5139-z},
doi = {10.1007/s12274-022-5139-z},
abstract = {Numerous therapeutic anti-tumor strategies have been developed in recent decades. However, their therapeutic efficacy is reduced by the intrinsic protective autophagy of tumors. Autophagy plays a key role in tumorigenesis and tumor treatment, in which the overproduction of reactive oxygen species (ROS) is recognized as the direct cause of protective autophagy. Only a few molecules have been employed as autophagy inhibitors in tumor therapy to reduce protective autophagy. Among them, hydroxychloroquine is the most commonly used autophagy inhibitor in clinics, but it is severely limited by its high therapeutic dose, significant toxicity, poor reversal efficacy, and nonspecific action. Herein, we demonstrate a reductive-damage strategy to enable tumor therapy by the inhibition of protective autophagy via the catalytic scavenging of ROS using porous nanorods of ceria (PN-CeO2) nanozymes as autophagy inhibitor. The antineoplastic effects of PN-CeO2 were mediated by its high reductive activity for intratumoral ROS degradation, thereby inhibiting protective autophagy and activating apoptosis by suppressing the activities of phosphatidylinositide 3-kinase/protein kinase B and p38 mitogen-activated protein kinase pathways in human cutaneous squamous cell carcinoma. Further investigation highlighted PN-CeO2 as a safe and efficient anti-tumor autophagy inhibitor. Overall, this study presents a reductive-damage strategy as a promising anti-tumor approach that catalytically inhibits autophagy and activates the intrinsic antioxidant pathways of tumor cells and also shows its potential for the therapy of other autophagy-related diseases.}
}