Open Access

miR-503 suppresses the proliferation and metastasis of esophageal squamous cell carcinoma by triggering autophagy via PKA/mTOR signaling

  • Authors:
    • Jian Wu
    • Fengxia Gao
    • Tao Xu
    • Xin Deng
    • Chao Wang
    • Xiaoyan Yang
    • Zhi Hu
    • Yang Long
    • Xuemei He
    • Guannan Liang
    • Delian Ren
    • Tianyang Dai
  • View Affiliations

  • Published online on: March 16, 2018     https://doi.org/10.3892/ijo.2018.4320
  • Pages: 1427-1442
  • Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

MicroRNA (miR)-503 is involved in the regulation of the malignant phenotype in multiple tumor types, and has been proven to be a novel diagnostic and therapeutic target; however, its function and mechanisms of action have not yet been fully elucidated in esophageal squamous cell carcinoma (ESCC). In the current study, we detected miR‑503 expression by RT‑qPCR and found that miR‑503 expression was increased in ESCC, but negatively correlated with lymph node metastasis, TNM stage and tumor differentiation. Functionally, we confirmed that miR‑503 inhibited the proliferation and metastasis of ESCC cells by triggering cellular autophagy. Mechanistically, we confirmed that miR‑503 exerted its biological effects by targeting protein kinase CAMP‑activated catalytic subunit alpha (PRKACA) in ESCC by dual luciferase reporter assay. Moreover, miR‑503 was found to trigger autophagy in ESCC cells through the protein kinase A (PKA)/mammalian target of rapamycin (mTOR) pathway. Taken together, our results demonstrate that miR‑503 suppresses the proliferation and metastasis of ESCC via the activation of autophagy, mediated by the PKA/mTOR signaling pathway.
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May-2018
Volume 52 Issue 5

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Copy and paste a formatted citation
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Spandidos Publications style
Wu J, Gao F, Xu T, Deng X, Wang C, Yang X, Hu Z, Long Y, He X, Liang G, Liang G, et al: miR-503 suppresses the proliferation and metastasis of esophageal squamous cell carcinoma by triggering autophagy via PKA/mTOR signaling. Int J Oncol 52: 1427-1442, 2018
APA
Wu, J., Gao, F., Xu, T., Deng, X., Wang, C., Yang, X. ... Dai, T. (2018). miR-503 suppresses the proliferation and metastasis of esophageal squamous cell carcinoma by triggering autophagy via PKA/mTOR signaling. International Journal of Oncology, 52, 1427-1442. https://doi.org/10.3892/ijo.2018.4320
MLA
Wu, J., Gao, F., Xu, T., Deng, X., Wang, C., Yang, X., Hu, Z., Long, Y., He, X., Liang, G., Ren, D., Dai, T."miR-503 suppresses the proliferation and metastasis of esophageal squamous cell carcinoma by triggering autophagy via PKA/mTOR signaling". International Journal of Oncology 52.5 (2018): 1427-1442.
Chicago
Wu, J., Gao, F., Xu, T., Deng, X., Wang, C., Yang, X., Hu, Z., Long, Y., He, X., Liang, G., Ren, D., Dai, T."miR-503 suppresses the proliferation and metastasis of esophageal squamous cell carcinoma by triggering autophagy via PKA/mTOR signaling". International Journal of Oncology 52, no. 5 (2018): 1427-1442. https://doi.org/10.3892/ijo.2018.4320