Open Access

Expression patterns of E2F transcription factors and their potential prognostic roles in breast cancer

  • Authors:
    • Yunhai Li
    • Jing Huang
    • Dejuan Yang
    • Shili Xiang
    • Jiazheng Sun
    • Hongzhong Li
    • Guosheng Ren
  • View Affiliations

  • Published online on: April 17, 2018     https://doi.org/10.3892/ol.2018.8514
  • Pages: 9216-9230
  • Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

E2Fs, as a family of pivotal transcription factors, have been implicated in multiple biological functions in human cancer; however, the expression and prognostic significance of E2Fs in breast cancer remains unknown. In the present study, the mRNA expression patterns of E2Fs in breast cancer were investigated with Oncomine and The Cancer Genome Atlas data. Prognostic values of E2Fs for patients with breast cancer were determined using the Kaplan‑Meier plotter database. The results strongly indicated that E2F1, E2F2, E2F3, E2F5, E2F7 and E2F8 were overexpressed in patients with breast cancer, whereas E2F4 and E2F6 exhibited no expression difference between patients with cancer and healthy controls. In survival analyses, elevated E2F1, E2F3, E2F5, E2F7 and E2F8 expression levels were significantly associated with lower overall survival, relapse‑free survival (RFS), distant metastasis‑free survival (DMFS) or post‑progression survival for patients with breast cancer. Furthermore, high expression of E2F4 indicated improved RFS but reduced DMFS. Subgroup analyses based on four clinicopathological factors further revealed that E2Fs were associated with the prognosis of patients with breast cancer in an estrogen receptor‑, progesterone receptor‑, human epidermal growth factor 2‑ and lymph node status‑specific manner. These data indicated that E2Fs may serve as promising biomarkers and therapeutic targets for breast cancer.
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June-2018
Volume 15 Issue 6

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Li Y, Huang J, Yang D, Xiang S, Sun J, Li H and Ren G: Expression patterns of E2F transcription factors and their potential prognostic roles in breast cancer. Oncol Lett 15: 9216-9230, 2018
APA
Li, Y., Huang, J., Yang, D., Xiang, S., Sun, J., Li, H., & Ren, G. (2018). Expression patterns of E2F transcription factors and their potential prognostic roles in breast cancer. Oncology Letters, 15, 9216-9230. https://doi.org/10.3892/ol.2018.8514
MLA
Li, Y., Huang, J., Yang, D., Xiang, S., Sun, J., Li, H., Ren, G."Expression patterns of E2F transcription factors and their potential prognostic roles in breast cancer". Oncology Letters 15.6 (2018): 9216-9230.
Chicago
Li, Y., Huang, J., Yang, D., Xiang, S., Sun, J., Li, H., Ren, G."Expression patterns of E2F transcription factors and their potential prognostic roles in breast cancer". Oncology Letters 15, no. 6 (2018): 9216-9230. https://doi.org/10.3892/ol.2018.8514