Journal Article

Corosolic acid sensitizes ferroptosis by upregulating HERPUD1 in liver cancer cells

Peng, Yingxiu, Li, Ning, Qian, Chunmei, Tang, Feifeng, Liu, Jingjin, Xu, Yanfeng, Jia, Tingting

2022

Overview

Primary liver cancer is the third leading cause of cancer death in the world, and the lack of effective treatments is the main reason for the high mortality. Corosolic acid (CA) has been proved to have antitumor activity. In this study, we found that CA can sensitize liver cancer cells to ferroptosis, which is a regulated form of cell death characterized by iron-dependent lipid peroxides reaching lethal levels. Here, we revealed that CA can inhibit glutathione (GSH) synthesis via HERPUD1, decreasing the cellular GSH level and causing liver cancer cells to become more sensitive to ferroptosis. Mechanistically, further studies found that HERPUD1 reduced the ubiquitination of the GSS-associated E3 ubiquitin ligase MDM2, which promoted ubiquitination of GSS, thereby inhibiting GSH synthesis to increase ferroptosis susceptibility. Importantly, a mouse xenograft model also demonstrated that CA inhibits tumor growth via HERPUD1. Collectively, our findings suggesting that CA is a candidate component for the development of treatments against liver cancer.

• Publisher: Nature Publishing Group UK,Springer Nature B.V,Nature Publishing Group
• Subject: 631/154/436 / 631/80/82 / 692/699/67/1059 / Antitumor activity / Apoptosis / Biochemistry / Biomedical and Life Sciences / Cell Biology / Cell Cycle Analysis / Cell death / Ferroptosis / Glutathione / Hepatocytes / Lethal levels / Life Sciences / Liver cancer / MDM2 protein / Stem Cells / Tumors / Ubiquitin / Ubiquitin-protein ligase / Ubiquitination / Xenografts