Nanomedicine enables autophagy-enhanced cancer-cell ferroptosis

• 作者: Jiacai Yang Li Ding Luodan Yu Yuemei Wang Min Ge Quzi Jiang Yu Chen
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ARTICLES
• 页码范围: 464-477
• 页数: 14页
• 语种: 英文

摘要

Ferroptosis and autophagy,playing significant roles in tumor treatment,are two typical forms of the programmed cell death.However,the rational combination of ferroptosis and autophagy for synergistic tumor therapy is still highly challenging.Herein,we report on an intriguing nanomedicine strategy for achieving autophagy-enhanced ferroptosis on efficiently combating cancer,which was based on the construction of trehalose-loaded mSiO2@MnOx-mPEG (TreMMM) nanoparticles with satisfactory biocompatibility.The nanoparticles are endowed with high glutathione (GSH) consumption efficiency,thereby inducing cancer-cell ferroptosis via inactivating glutathione peroxidases 4 (GPX4).Subsequently,the TreMMM degradation due to the GSH depletion and pH sensitivity contributed to the trehalose release for inducing autophagy,promoting/enhancing ferroptosis by NCOA4-mediated degradation of ferritin.A substantial in vitro and in vivo antitumor effect was achieved by such an intriguing autophagyenhanced ferroptosis.Therefore,the rational combination of GSH-consumption-induced ferroptosis and trehalose-induced autophagy by nanomedicine design provides an alternative but effective strategy for tumor treatment.