Open Access

miR‑501‑3p promotes colorectal cancer progression via activation of Wnt/β‑catenin signaling

  • Authors:
    • Fangxiong Wu
    • Tongchao Xing
    • Xiaopeng Gao
    • Fengrui Liu
  • View Affiliations

  • Published online on: July 30, 2019     https://doi.org/10.3892/ijo.2019.4852
  • Pages: 671-683
  • Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Aberrant activation of Wnt/β‑catenin signaling is observed in >90% of colorectal cancer cases. microRNAs (miRNAs) regulate the expression of key genes in Wnt/β‑catenin signaling. As a result, abnormal expression of miRNAs regulates the activation of Wnt/β‑catenin signaling in several types of cancer. In the current study, it was demonstrated that miR‑501‑3p was overexpressed in colorectal tumor tissues compared to the adjacent normal tissues. Downregulation of miR‑501‑3p inhibited cell proliferation and sphere formation, while it induced cell cycle arrest at the G1 phase in colorectal cancer cells. Bioinformatics analysis results predicted that adenomatous polyposis coli (APC), a negative regulator of Wnt/β‑catenin signaling, was a potential target gene of miR‑501‑3p. Inhibition of miR‑501‑3p increased APC expression in colorectal cancer cells. Additionally, β‑catenin was destabilized following miR‑501‑3p inhibition; immunofluorescence analysis revealed that β‑catenin translocated from nucleus to cytoplasm. In addition, cyclin D1 and c‑Myc, two well‑characterized target genes of Wnt/β‑catenin signaling, were downregulated following miR‑501‑3p inhibition. Transfection of APC small interfering RNA re‑activated β‑catenin and stimulated the expression of cyclin D1 and c‑Myc. Furthermore, silencing of APC reversed the miR‑501‑3p inhibitor‑induced cell cycle disruption, and the inhibition of cell proliferation and sphere formation in colorectal cancer cells. In conclusion, the present study identified miR‑501‑3p as a novel regulator of Wnt/β‑catenin signaling in colorectal cancer cells via targeting APC, suggesting that miR‑501‑3p may act as a novel oncogenic miRNA in colorectal cancer.
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September 2019
Volume 55 Issue 3

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

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APA
Wu, F., Xing, T., Gao, X., & Liu, F. (2019). miR‑501‑3p promotes colorectal cancer progression via activation of Wnt/β‑catenin signaling. International Journal of Oncology, 55, 671-683. https://doi.org/10.3892/ijo.2019.4852
MLA
Wu, F., Xing, T., Gao, X., Liu, F."miR‑501‑3p promotes colorectal cancer progression via activation of Wnt/β‑catenin signaling". International Journal of Oncology 55.3 (2019): 671-683.
Chicago
Wu, F., Xing, T., Gao, X., Liu, F."miR‑501‑3p promotes colorectal cancer progression via activation of Wnt/β‑catenin signaling". International Journal of Oncology 55, no. 3 (2019): 671-683. https://doi.org/10.3892/ijo.2019.4852