Overexpression of LINC00551 promotes autophagy-dependent ferroptosis of lung adenocarcinoma via upregulating DDIT4 by sponging miR-4328

Autor: Xiong Peng, Rui Yang, Weilin Peng, Zhenyu Zhao, Guangxu Tu, Boxue He, Qidong Cai, Shuai Shi, Wei Yin, Fenglei Yu, Yongguang Tao, Xiang Wang
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: PeerJ, Vol 10, p e14180 (2022)
Druh dokumentu: article
ISSN: 2167-8359
DOI: 10.7717/peerj.14180
Popis: According to mounting evidence, long noncoding RNAs (lncRNAs) play a vital role in regulated cell death (RCD). A potential strategy for cancer therapy involves triggering ferroptosis, a novel form of RCD. Although it is thought to be an autophagy-dependent process, it is still unclear how the two processes interact. This study characterized a long intergenic noncoding RNA, LINC00551, expressed at a low level in lung adenocarcinoma (LUAD) and some other cancers. Overexpression of LINC00551 suppresses cell viability while promoting autophagy and RSL-3-induced ferroptosis in LUAD cells. LINC00551 acts as a competing endogenous RNA (ceRNA) and binds with miR-4328 which up-regulates the target DNA damage-inducible transcript 4 (DDIT4). DDIT4 inhibits the activity of mTOR, promotes LUAD autophagy, and then promotes the ferroptosis of LUAD cells in an autophagy-dependent manner. This study provided an insight into the molecular mechanism regulating ferroptosis and highlighted LINC00551 as a potential therapeutic target for LUAD.
Databáze: Directory of Open Access Journals