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MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway

  • Authors:
    • Jing Guo
    • Lingfen Xu
    • Xu Teng
    • Mei Sun
  • View Affiliations / Copyright

    Affiliations: Department of Pediatrics, the Affiliated Shengjing Hospital, China Medical University, Shenyang, Liaoning 110004, P.R. China
    Copyright: © Guo et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1435-1443
    |
    Published online on: September 6, 2017
       https://doi.org/10.3892/ijmm.2017.3120
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Abstract

Trefoil factor 3 (TFF3) reconstructs the epithelial barrier by stimulating epithelial cell migration and proliferation, and significantly contributes to intestinal mucosal damage and healing. In a previous study, TFF3 was identified as a novel target of microRNA-7-5p (miR-7-5p). The aim of the present study was to investigate the roles and mechanisms of miR-7-5p in the proliferation and migration of intestinal epithelial cells. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was performed to determine the expression level of miR-7-5p in the experimental groups. In addition, western blot analysis was performed to examine the expression levels of TFF3, phosphoinositide 3-kinase (PI3K), Akt and phosphorylated (p)-AKT when miR-7-5p or TFF3 was overexpressed, and the effects of miR-7-5p and TFF3 on LS174T cell proliferation and migration were simultaneously investigated. miR-7-5p was demonstrated to decrease the expression level of TFF3, and inhibit LS174T cell proliferation and migration, which was accompanied by decreased expression levels of PI3K and p-Akt. miR-7-5p was decreased following combined treatment with the TFF3 plasmid and miR‑7-5p mimics, compared with treatment with miR-7-5p mimics alone, which was accompanied by increased expression levels of TFF3, PI3K and p-Akt, and enhanced LS174T cell proliferation and migration effects. The expression levels of miR-7-5p in the miRNA negative control (NC) + LY294002 group, the miR‑7-5p mimic + LY294002 group, and the miR-7-5p mimic + TFF3 plasmid + LY294002 group were higher than those in the NC group, the miR-7-5p mimic group and the miR-7-5p mimic + TFF3 plasmid group, respectively. Accordingly, the expression level of TFF3 was downregulated and the proliferation and migration ability of the cells was downregulated. The present study demonstrates that overexpressed miR-7-5p may inhibit the proliferation and migration of LS174T cells by targeting the expression of TFF3 via inhibiting the PI3K/Akt signalling pathway. The PI3K/Akt signalling pathway may exert a feedback regulation effect on miR-7-5p, inhibiting the activity of this signalling pathway, which increases the miR-7-5p expression levels and further enhances the effects of miR-7-5p on cell proliferation and migration.
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Copy and paste a formatted citation
Spandidos Publications style
Guo J, Xu L, Teng X and Sun M: MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway. Int J Mol Med 40: 1435-1443, 2017.
APA
Guo, J., Xu, L., Teng, X., & Sun, M. (2017). MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway. International Journal of Molecular Medicine, 40, 1435-1443. https://doi.org/10.3892/ijmm.2017.3120
MLA
Guo, J., Xu, L., Teng, X., Sun, M."MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway". International Journal of Molecular Medicine 40.5 (2017): 1435-1443.
Chicago
Guo, J., Xu, L., Teng, X., Sun, M."MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway". International Journal of Molecular Medicine 40, no. 5 (2017): 1435-1443. https://doi.org/10.3892/ijmm.2017.3120
Copy and paste a formatted citation
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Spandidos Publications style
Guo J, Xu L, Teng X and Sun M: MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway. Int J Mol Med 40: 1435-1443, 2017.
APA
Guo, J., Xu, L., Teng, X., & Sun, M. (2017). MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway. International Journal of Molecular Medicine, 40, 1435-1443. https://doi.org/10.3892/ijmm.2017.3120
MLA
Guo, J., Xu, L., Teng, X., Sun, M."MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway". International Journal of Molecular Medicine 40.5 (2017): 1435-1443.
Chicago
Guo, J., Xu, L., Teng, X., Sun, M."MicroRNA-7-5p regulates the proliferation and migration of intestinal epithelial cells by targeting trefoil factor 3 via inhibiting the phosphoinositide 3-kinase/Akt signalling pathway". International Journal of Molecular Medicine 40, no. 5 (2017): 1435-1443. https://doi.org/10.3892/ijmm.2017.3120
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