Long non-coding RNA DARS-AS1 promotes tumor progression by directly suppressing PACT-mediated cellular stress
-
Published:2022-08-15
Issue:1
Volume:5
Page:
-
ISSN:2399-3642
-
Container-title:Communications Biology
-
language:en
-
Short-container-title:Commun Biol
Author:
Yang Liuqing, Lin Kequan, Zhu Lin, Wang Huili, Teng Shuaishuai, Huang Lijun, Zhou Shiyi, Zhang GuanbinORCID, Lu Zhi JohnORCID, Wang DongORCID
Abstract
AbstractCancer cells evolve various mechanisms to overcome cellular stresses and maintain progression. Protein kinase R (PKR) and its protein activator (PACT) are the initial responders in monitoring diverse stress signals and lead to inhibition of cell proliferation and cell apoptosis in consequence. However, the regulation of PACT-PKR pathway in cancer cells remains largely unknown. Herein, we identify that the long non-coding RNA (lncRNA) aspartyl-tRNA synthetase antisense RNA 1 (DARS-AS1) is directly involved in the inhibition of the PACT-PKR pathway and promotes the proliferation of cancer cells. Using large-scale CRISPRi functional screening of 971 cancer-associated lncRNAs, we find that DARS-AS1 is associated with significantly enhanced proliferation of cancer cells. Accordingly, knocking down DARS-AS1 inhibits cell proliferation of multiple cancer cell lines and promotes cancer cell apoptosis in vitro and significantly reduces tumor growth in vivo. Mechanistically, DARS-AS1 directly binds to the activator domain of PACT and prevents PACT-PKR interaction, thereby decreasing PKR activation, eIF2α phosphorylation and inhibiting apoptotic cell death. Clinically, DARS-AS1 is broadly expressed across multiple cancers and the increased expression of this lncRNA indicates poor prognosis. This study elucidates the lncRNA DARS-AS1 directed cancer-specific modulation of the PACT-PKR pathway and provides another target for cancer prognosis and therapeutic treatment.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology,Medicine (miscellaneous)
Reference68 articles.
1. Wang, G., Yang, Z.-Q. & Zhang, K. Endoplasmic reticulum stress response in cancer: molecular mechanism and therapeutic potential. Am. J. Transl. Res. 2, 65–74 (2010). 2. Dicks, N., Gutierrez, K., Michalak, M., Bordignon, V. & Agellon, L. B. Endoplasmic reticulum stress, genome damage, and cancer. Front. Oncol. 5, 11 (2015). 3. O’Malley, J., Kumar, R., Inigo, J., Yadava, N. & Chandra, D. Mitochondrial stress response and cancer. Trends Cancer 6, 688–701 (2020). 4. Lin, S. C. et al. The mitochondrial deoxyguanosine kinase is required for cancer cell stemness in lung adenocarcinoma. EMBO Mol. Med. 11, 20 (2019). 5. Haupt, Y., Maya, R., Kazaz, A. & Oren, M. Mdm2 promotes the rapid degradation of p53. Nature 387, 296–299 (1997).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|