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Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer

  • Authors:
    • L. L. Qu
    • L. He
    • X. Zhao
    • W. Xu
  • View Affiliations / Copyright

    Affiliations: Department of Laboratory Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China, Department of Gastroenterology Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China, Department of Hepatology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
    Copyright: © Qu et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 1266-1272
    |
    Published online on: March 18, 2015
       https://doi.org/10.3892/ijmm.2015.2145
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Abstract

The aim of the present study was to investigate the biological role and underlying mechanisms of action of miR‑518a‑3p in the progression and invasion of colorectal cancer (CRC). Reverse transcription-quantitative PCR (RT-qPCR) was used to examine the mRNA expression levels of miR‑518a‑3p in 5 CRC cell lines (SW480, SW620, HCT116, HT29 and LoVo) in a normal colonic cell line, NCM460, as well as in tumor tissues with or without metastases. The biological effects of miR‑518a‑3p were assessed in the CRC cell lines by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometric analysis, and RT‑qPCR and western blot analyses were employed to evaluate the expression of miR‑518a‑3p targets. The regulation of NF‑κB‑inducing kinase (NIK) by miR‑518a‑3p was confirmed using luciferase activity assays. Our results revealed that miR‑518a‑3p was significantly downregulated in the CRC cell lines compared with the normal colonic cell line (P<0.05), as well as in the CRC tissues with distant metastases compared with the tissues without metastases. The downregulation of miR‑518a‑3p was associated with tumor size, distant metastasis and TNM stage in the patients with CRC. Moreover, the ectopic expression of miR‑518a‑3p and the inhibition of NIK by RNA interference markedly reduced cell proliferation and enhanced the apoptosis of CRC cells. Further experiments revealed that NIK, a regulator of NF‑κB, was a downstream target of miR‑518a‑3p. The presents findings indicate that miR‑518a‑3p plays an important role in the progression of CRC by targeting NIK.
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Copy and paste a formatted citation
Spandidos Publications style
Qu LL, He L, Zhao X and Xu W: Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer. Int J Mol Med 35: 1266-1272, 2015.
APA
Qu, L.L., He, L., Zhao, X., & Xu, W. (2015). Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer. International Journal of Molecular Medicine, 35, 1266-1272. https://doi.org/10.3892/ijmm.2015.2145
MLA
Qu, L. L., He, L., Zhao, X., Xu, W."Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer". International Journal of Molecular Medicine 35.5 (2015): 1266-1272.
Chicago
Qu, L. L., He, L., Zhao, X., Xu, W."Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer". International Journal of Molecular Medicine 35, no. 5 (2015): 1266-1272. https://doi.org/10.3892/ijmm.2015.2145
Copy and paste a formatted citation
x
Spandidos Publications style
Qu LL, He L, Zhao X and Xu W: Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer. Int J Mol Med 35: 1266-1272, 2015.
APA
Qu, L.L., He, L., Zhao, X., & Xu, W. (2015). Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer. International Journal of Molecular Medicine, 35, 1266-1272. https://doi.org/10.3892/ijmm.2015.2145
MLA
Qu, L. L., He, L., Zhao, X., Xu, W."Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer". International Journal of Molecular Medicine 35.5 (2015): 1266-1272.
Chicago
Qu, L. L., He, L., Zhao, X., Xu, W."Downregulation of miR-518a-3p activates the NIK-dependent NF-κB pathway in colorectal cancer". International Journal of Molecular Medicine 35, no. 5 (2015): 1266-1272. https://doi.org/10.3892/ijmm.2015.2145
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