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m6A-Mediated Biogenesis of circDDIT4 Inhibits Prostate Cancer Progression by Sequestrating ELAVL1/HuR. | LitMetric

m6A-Mediated Biogenesis of circDDIT4 Inhibits Prostate Cancer Progression by Sequestrating ELAVL1/HuR.

Mol Cancer Res

Obstetrics and Gynecology Hospital of Fudan University, State Key Lab of Genetic Engineering, MOE Engineering Research Center of Gene Technology, School of Life Sciences, Key Laboratory of Reproduction Regulation of NPFPC (SIPPR, IRD), Fudan University, Shanghai, P.R. China.

Published: December 2023

AI Article Synopsis

Article Abstract

Unlabelled: The pathologic significance of the circular RNA DDIT4 (circDDIT4), which is formed by backsplicing at the 3'-untranslated region (UTR) with a 5' splice acceptor site in exon 2 of linear DDIT4 mRNA, has yet to be determined. Our study found that circDDIT4 is downregulated in prostate cancer and functions as a tumor suppressor during prostate cancer progression. By competitively binding to ELAV-like RNA binding protein 1 (ELAVL1/HuR) through its 3'-UTR, circDDIT4 acts as a protein sponge to decrease the expression of prostate cancer-overexpressed anoctamin 7 (ANO7). This promotes prostate cancer cell apoptosis while inhibiting cell proliferation and metastasis. Furthermore, we discovered that N6-methyladenosine (m6A) modification facilitates the biogenesis of circDDIT4. The methyltransferase complex consisting of WTAP/METTL3/METTL14 increases the level of circDDIT4, while the RNA demethylase FTO decreases it.

Implications: These findings suggest that abnormal cotranscriptional modification of m6A promotes prostate cancer initiation and progression via a circular RNA-protein-cell signaling network.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10690048PMC
http://dx.doi.org/10.1158/1541-7786.MCR-22-0271DOI Listing

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