MicroRNA-138-5p controls sensitivity of nasopharyngeal carcinoma to radiation by targeting EIF4EBP1

  • Authors:
    • Wei Gao
    • Jacky Wei Kei Lam
    • John Zeng-Hong Li
    • Si-Qi Chen
    • Raymond King-Yin Tsang
    • Jimmy Yu-Wai Chan
    • Thian-Sze Wong
  • View Affiliations

  • Published online on: January 4, 2017     https://doi.org/10.3892/or.2017.5354
  • Pages: 913-920
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Abstract

Radiation therapy is the standard treatment for primary nasopharyngeal carcinoma (NPC). MicroRNA regulates cancer responsiveness to radiation therapy by controlling the genes involved in radiation responses. Recent studies suggested that downregulation of microRNA-138-5p was clinically significant in NPC. Here, we evaluated the effect of miR-138-5p on radiosensitivity of NPC cells and explored the underlying mechanisms by identifying its target gene that impacted sensitivity to radiation. Our results revealed that overexpression of miR-138-5p reduced the ability to form colonies, inhibited proliferation, and enhanced radiation-induced DNA damage and autophagy in NPC cells upon radiation treatment. By integrating predicted targets with the transcripts downregulated by miR-138-5p, EIF4EBP1 was identified to be a target gene of miR-138-5p. Results from luciferase reporter assay demonstrated that miR-138-5p downregulated the expression of EIF4EBP1 by binding to the 3'-UTR. Silence of EIF4EBP1 enhanced radiosensitivity of NPC cells as evidenced by reduced ability to form colonies after radiation exposure. In summary, our results indicated that miR-138-5p enhanced radiosensitivity of NPC cells by targeting EIF4EBP1. Further studies are warranted to investigate the potential use of miR-138-5p in the clinical management and treatment prediction of NPC patients.
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February-2017
Volume 37 Issue 2

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Gao W, Lam JW, Li JZ, Chen S, Tsang RK, Chan JY and Wong T: MicroRNA-138-5p controls sensitivity of nasopharyngeal carcinoma to radiation by targeting EIF4EBP1. Oncol Rep 37: 913-920, 2017
APA
Gao, W., Lam, J.W., Li, J.Z., Chen, S., Tsang, R.K., Chan, J.Y., & Wong, T. (2017). MicroRNA-138-5p controls sensitivity of nasopharyngeal carcinoma to radiation by targeting EIF4EBP1. Oncology Reports, 37, 913-920. https://doi.org/10.3892/or.2017.5354
MLA
Gao, W., Lam, J. W., Li, J. Z., Chen, S., Tsang, R. K., Chan, J. Y., Wong, T."MicroRNA-138-5p controls sensitivity of nasopharyngeal carcinoma to radiation by targeting EIF4EBP1". Oncology Reports 37.2 (2017): 913-920.
Chicago
Gao, W., Lam, J. W., Li, J. Z., Chen, S., Tsang, R. K., Chan, J. Y., Wong, T."MicroRNA-138-5p controls sensitivity of nasopharyngeal carcinoma to radiation by targeting EIF4EBP1". Oncology Reports 37, no. 2 (2017): 913-920. https://doi.org/10.3892/or.2017.5354