Abstract
This study aimed to investigate the roles of METTL3, a regulator of m6A, in NSCLC. RT-qPCR was applied to determine mRNA of m6A-associated genes and SFRP2, and western blot were used for ZEB1 and MMP9 protein expression. Total m6A level was measured using methylated RNA immunoprecipitation (MeRIP) assay, and RIP was used to access m6A level of SFRP2. Cellular behaviors were detected using CCK-8 and tranwell assays. Xenograft assays were conducted to further verify the roles of METTL3 and SFRP2 in NSCLC. The expression level of METTL3 was higher in NSCLC than normal controls. However, downregulation of METTL3 restrained the proliferation, migration and invasion of NSCLC cells. Enhanced expression of METTL3 caused the inverse consequences. Moreover, SFRP2 was found to be negatively regulated by METTL3. Intriguingly, the anti-tumor functions of METTL3 knockdown in the phenotype of NSCLC cells and xenograft mice were overturned by inhibition of SFRP2. Silencing METTL3 resulted in the enhanced stability of SFRP2. Finally, downregulation of SFRP2 induced by METTL3 activated the Wnt/β-catenin signaling pathway in NSCLC. METTL3 acted as an oncogene in the pathogenesis of NSCLC via suppressing SFRP2 to activate Wnt/β-catenin signaling pathway, indicating that METTL3 might be a promising predictor in NSCLC.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This study was supported by Study on the safety and efficacy of transbronchial or percutaneous one-stop microwave ablation in the treatment of pulmonary nodules(GWJJ2021100304).
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PS and GZ conceived the study; DZ conducted the experiments; YH analyzed the data; SZ wrote the manuscript; all the authors read and approved the final version of the manuscript.
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This study protocol was approved by the Ethics Committee of Chinese PLA General Hospital. All manipulations on mice conformed to the standards of the Institutional Animal Care and Utilization Committee of Chinese PLA General Hospital.
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Zhao, S., Song, P., Zhou, G. et al. METTL3 promotes the malignancy of non-small cell lung cancer by N6-methyladenosine modifying SFRP2. Cancer Gene Ther 30, 1094–1104 (2023). https://doi.org/10.1038/s41417-023-00614-1
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DOI: https://doi.org/10.1038/s41417-023-00614-1