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MiR-183 promotes growth of non-small cell lung cancer cells through FoxO1 inhibition

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Tumor Biology

Abstract

Non-small cell lung cancer (NSCLC) is a prevalent cancer in lung of high incidence. NSCLCs often appear to be fast growing, which renders comprehension of the mechanisms underlying the growth of NSCLC extremely critical. Previous study has addressed a role of microRNA (miR) family member, miR-183, in the regulation of the invasiveness of NSCLC, whereas the role of miR-183 in the growth control of NSCLC is not clear. Here, we analyzed the regulation of FoxO1 by miR-183 in vitro using luciferase-reporter assay. We also analyzed the effects of miR-183 on NSCLC cell growth in vitro using a microculture tetrazolium (MTT) assay and in vivo by visualizing tumor growth using bioluminescence assay. We found that overexpression of miR-183 in NSCLC cells decreased FoxO1 protein levels, whereas inhibition of miR-183 increased FoxO1 protein levels without affecting FoxO1 transcripts. Moreover, miR-183 bound to FoxO1 mRNA to prevent its translation through its 3′untranslated region (UTR). Furthermore, administration of miR-183 suppressed FoxO1 levels in NSCLC, resulting in a significant increase in NSCLC growth in vitro and in vivo, while administration of antisense of miR-183 significantly increased FoxO1 levels in NSCLC resulting in a significant decrease in NSCLC growth. Taken together, our data demonstrate that miR-183/FoxO1 axis may be a novel therapeutic target for regulating the growth of NSCLC.

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Correspondence to Liqun Zhang.

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Zhang, L., Quan, H., Wang, S. et al. MiR-183 promotes growth of non-small cell lung cancer cells through FoxO1 inhibition. Tumor Biol. 36, 8121–8126 (2015). https://doi.org/10.1007/s13277-015-3550-8

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  • DOI: https://doi.org/10.1007/s13277-015-3550-8

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