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International Journal of Oncology
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Article

Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A

  • Authors:
    • Lun-De Zhao
    • Wei-Wei Zheng
    • Gao-Xiang Wang
    • Xiao-Chun Kang
    • Lei Qin
    • Juan-Juan Ji
    • Sha Hao
  • View Affiliations / Copyright

    Affiliations: Department of Emergency, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, P.R. China, Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, P.R. China, Department of Oncology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, P.R. China, Department of Gastroenterology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, P.R. China, Department of Medical Oncology, Jingmen Traditional Chinese Medicine Hospital, Jingmen, Hubei 448000, P.R. China
  • Pages: 1977-1984
    |
    Published online on: March 3, 2016
       https://doi.org/10.3892/ijo.2016.3414
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Abstract

Aberrant microRNA expression is common in colorectal cancer and DNA methylation is believed to be responsible for this alteration. In this study, we performed evaluation in vivo and in vitro to determine the role of miR-181b as a potential diagnostic and prognostic biomarker in colorectal cancer. Ninty-seven pairs of colorectal cancer tissues and adjacent normal tissues were collected. The expression level and methylation status of miR-181b was determined in tissue samples and multiple colorectal cancer cell lines. RASSF1A, a predicted target gene of miR-181b, was investigated in vitro. Further mechanistic explorations were conducted. It was found that miR-181b expression was frequently downregulated in cancer samples. This lower expression level resulted from higher hypermethylation in cancer tissue and was closely related to TNM stage. Following artificial synthesis of miR-181b stimulation, colorectal cancer cell proliferation was greatly inhibited in CRC cells while apoptosis percentage markedly increased. miR-181b achieved the tumor suppressive effects via direct targeting of the RASSF1A gene. This study indicated the clinical significance of miR-181b and the influence of miR-181b promoter region in epigenetic silencing of tumorigenicity in colorectal cancer, and implied the possible usage of miR-181b as a diagnostic and prognostic biomarker in colorectal cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Zhao L, Zheng W, Wang G, Kang X, Qin L, Ji J and Hao S: Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A. Int J Oncol 48: 1977-1984, 2016.
APA
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., & Hao, S. (2016). Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A. International Journal of Oncology, 48, 1977-1984. https://doi.org/10.3892/ijo.2016.3414
MLA
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., Hao, S."Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A". International Journal of Oncology 48.5 (2016): 1977-1984.
Chicago
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., Hao, S."Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A". International Journal of Oncology 48, no. 5 (2016): 1977-1984. https://doi.org/10.3892/ijo.2016.3414
Copy and paste a formatted citation
x
Spandidos Publications style
Zhao L, Zheng W, Wang G, Kang X, Qin L, Ji J and Hao S: Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A. Int J Oncol 48: 1977-1984, 2016.
APA
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., & Hao, S. (2016). Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A. International Journal of Oncology, 48, 1977-1984. https://doi.org/10.3892/ijo.2016.3414
MLA
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., Hao, S."Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A". International Journal of Oncology 48.5 (2016): 1977-1984.
Chicago
Zhao, L., Zheng, W., Wang, G., Kang, X., Qin, L., Ji, J., Hao, S."Epigenetic silencing of miR-181b contributes to tumorigenicity in colorectal cancer by targeting RASSF1A". International Journal of Oncology 48, no. 5 (2016): 1977-1984. https://doi.org/10.3892/ijo.2016.3414
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