Abstract
Objective
To clarify the modulatory mechanism of miR-31-5p in lung adenocarcinoma (LUAD) progression in vivo and in vitro.
Methods
The Cancer Genome Atlas (TCGA) database was employed to access LUAD-related miRNA and mRNA expression data. Downstream targets of miR-31-5p were predicted by public databases. The interaction between miR-31-5p and TNS1 was determined by dual-luciferase reporter assay. Quantitative real-time polymerase chain reaction (qRT-PCR) was utilized to measure miR-31-5p and TNS1 expression levels in LUAD cells. Western blot was introduced to test protein expression levels of TNS1, p53, and apoptosis-related proteins. In-vitro functional assays were conducted to evaluate the biological effects of miR-31-5p on cell proliferation, colony formation, migration, and apoptosis. In-vivo tumor xenograft experiment was applied to examine the effects of miR-31-5p on LUAD tumor growth, followed by immunochemistry assays for assessing TNS1 and p53 expression levels in the tumor tissue.
Results
miR-31-5p was prominently upregulated in LUAD tissue and was identified to present a similar trend in LUAD cell lines H1299, H23, and A549. miR-31-5p overexpression exerted an active role in cell proliferation and migration, but it suppressed cell apoptosis. Additionally, a reverse correlation between miR-31-5p and TNS1 regarding the expression level was identified, and TNS1 was verified to be a direct target of miR-31-5p. Besides, it was further validated by the rescue experiments that the tumor-promoting effects of miR-31-5p on LUAD cell functions were attenuated by TNS1 overexpression to some extent. The results based on the tumor xenograft experiment revealed that LUAD cell growth could be facilitated by miR-31-5p via the TNS1/p53 axis.
Conclusion
miR-31-5p facilitates LUAD cell progression mediated by the TNS1/p53 axis.
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C. Zhu, S. Wang, M. Zheng, Z. Chen, G. Wang, J. Ma, B. Zhang, W. Huang, X. Sun, and C. Wang declare that they have no competing interests.
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66_2021_1895_MOESM3_ESM.tif
Supplementary Fig. 1: (A) Relationship between miR-31-5p and patients’ survival; (B) relationship between TNS1 and patients’ survival; (C) relationship between miR-31-5p/TNS1 and patients’ survival; (D, E) univariate and multivariate cox regression on miR-31-5p and TNS1 combined with the common clinical features
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Zhu, C., Wang, S., Zheng, M. et al. miR-31-5p modulates cell progression in lung adenocarcinoma through TNS1/p53 axis. Strahlenther Onkol 198, 304–314 (2022). https://doi.org/10.1007/s00066-021-01895-x
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DOI: https://doi.org/10.1007/s00066-021-01895-x