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The transcription factor FOXN3 inhibits cell proliferation by downregulating E2F5 expression in hepatocellular

Ji Sun1,2, Hong Li2, Qi Huo2

  • 1Shanghai Medical College, Fudan University, Shanghai, China.

Oncotarget
|June 4, 2016
PubMed

Insights

Forkhead box N3 (FOXN3) acts as a tumor suppressor in hepatocellular carcinoma (HCC). This study found FOXN3 inhibits HCC cell growth by reducing the oncogene E2F5 expression.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Hepatocellular carcinoma (HCC) is a leading cause of cancer mortality globally.
  • The molecular mechanisms driving HCC development require further investigation.
  • Forkhead box N3 (FOXN3), a transcription factor, has known roles in various cancers but its function in HCC is unexplored.

Purpose of the Study:

  • To investigate the role of FOXN3 in hepatocellular carcinoma.
  • To determine the effect of FOXN3 on HCC cell proliferation and the expression of E2F5.

Main Methods:

  • Comparison of FOXN3 expression in human HCC tissues and adjacent normal liver tissues.
  • In vitro and in vivo functional assays to assess FOXN3's impact on HCC cell proliferation.
  • Analysis of FOXN3's effect on E2F5 mRNA, protein expression, and promoter activity.

Main Results:

  • FOXN3 expression was found to be downregulated in human primary HCC tissues.
  • FOXN3 significantly inhibited HCC cell proliferation both in vitro and in vivo.
  • FOXN3 repressed the expression of the potential oncogene E2F5 at both mRNA and protein levels by inhibiting its promoter activity.

Conclusions:

  • FOXN3 functions as a tumor suppressor in hepatocellular carcinoma.
  • The tumor-suppressive role of FOXN3 in HCC is mediated through the downregulation of E2F5 expression.
Keywords:
E2F5FoxN3/CHES1hepatocellular carcinoma

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