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Article Open Access

Expression profile and biological function of miR‑455‑5p in colorectal carcinoma

  • Authors:
    • Jinqiu Wang
    • Yang Lu
    • Yiyong Zeng
    • Leming Zhang
    • Kongliang Ke
    • Yu Guo
  • View Affiliations / Copyright

    Affiliations: Department of Breast Surgery, Ningbo First Hospital, Ningbo, Zhejiang 315010, P.R. China, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China, Department of Proctology, Ningbo First Hospital, Ningbo, Zhejiang 315010, P.R. China
    Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 4.0].
  • Pages: 2131-2140
    |
    Published online on: December 21, 2018
       https://doi.org/10.3892/ol.2018.9862
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Abstract

Underexpression of microRNA‑455‑5p (miR‑455‑5p) in medullary thyroid carcinoma, melanoma, gastric cancer and additional cancer types has been reported, which may be associated with carcinoma development. The present study aimed to evaluate the expression profile and biological role of miR‑455‑5p in colorectal carcinoma. Carcinoma tissues and adjacent tissue specimens from 40 patients with colorectal cancer were randomly collected. Reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) analysis was conducted to detect the expression levels of miR‑455‑5p in colorectal carcinoma and adjacent normal tissues. The biological effects of miR‑455‑5p on selected colorectal cancer cells were assessed using bromodeoxyuridine assays, wound healing migration assays and flow cytometry. Bioinformatics analysis was implemented to predict the potential target genes of miR‑455‑5p in colorectal cancer. The expression levels of target genes were further validated by RT‑qPCR and western blot analysis of the mRNA and protein levels. The results of the experiments demonstrated that miR‑455‑5p expression was downregulated in colorectal cancer tissues compared with adjacent normal tissues. In colorectal cancer cells (SW‑480, HT‑29 and HCT‑116), miR‑455‑5p was observed to inhibit cell proliferation and migration while promoting cell apoptosis. Bioinformatics analysis predicted that the oncogene phosphoinositide‑3‑kinase regulatory subunit 1 (PIK3R1) was one of the top ranked target genes of miR‑455‑5p in colorectal cancer cells. This association was validated by RT‑qPCR and western blotting. In vivo studies revealed that the expression level of miR‑455‑5p was significantly downregulated in human colorectal cancer. Further in vitro studies suggested that miR‑455‑5p may prevent the development of colorectal cancer by downregulating the oncogene PIK3R1. It was concluded that miR‑455‑5p may target and downregulate PIK3R1 in colorectal cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Wang J, Lu Y, Zeng Y, Zhang L, Ke K and Guo Y: Expression profile and biological function of miR‑455‑5p in colorectal carcinoma. Oncol Lett 17: 2131-2140, 2019.
APA
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., & Guo, Y. (2019). Expression profile and biological function of miR‑455‑5p in colorectal carcinoma. Oncology Letters, 17, 2131-2140. https://doi.org/10.3892/ol.2018.9862
MLA
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., Guo, Y."Expression profile and biological function of miR‑455‑5p in colorectal carcinoma". Oncology Letters 17.2 (2019): 2131-2140.
Chicago
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., Guo, Y."Expression profile and biological function of miR‑455‑5p in colorectal carcinoma". Oncology Letters 17, no. 2 (2019): 2131-2140. https://doi.org/10.3892/ol.2018.9862
Copy and paste a formatted citation
x
Spandidos Publications style
Wang J, Lu Y, Zeng Y, Zhang L, Ke K and Guo Y: Expression profile and biological function of miR‑455‑5p in colorectal carcinoma. Oncol Lett 17: 2131-2140, 2019.
APA
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., & Guo, Y. (2019). Expression profile and biological function of miR‑455‑5p in colorectal carcinoma. Oncology Letters, 17, 2131-2140. https://doi.org/10.3892/ol.2018.9862
MLA
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., Guo, Y."Expression profile and biological function of miR‑455‑5p in colorectal carcinoma". Oncology Letters 17.2 (2019): 2131-2140.
Chicago
Wang, J., Lu, Y., Zeng, Y., Zhang, L., Ke, K., Guo, Y."Expression profile and biological function of miR‑455‑5p in colorectal carcinoma". Oncology Letters 17, no. 2 (2019): 2131-2140. https://doi.org/10.3892/ol.2018.9862
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