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Downregulating forkhead box M1 inhibits proliferation by inhibiting autophagy in the sw480 cell line

Shibiao Zhong1, Aiyan Zhou2, Fanghua Qi2

  • 1Department of Anorectal Surgery, Minzu Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi Zhuang Autonomous Region 530001, P.R. China.

Biomedical Reports
|July 8, 2017
PubMed

Insights

Forkhead Box M1 (FoxM1) oncogene knockdown inhibits colon cancer cell proliferation. This study reveals FoxM1 regulates cancer cell growth by affecting autophagy, a key cellular process.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Biology

Background:

  • Forkhead Box M1 (FoxM1) is a key oncogene implicated in various cancers, including colon cancer.
  • Overexpression of FoxM1 is frequently observed in malignant tumors, suggesting its critical role in cancer development and progression.

Purpose of the Study:

  • To elucidate the mechanism by which FoxM1 influences cancer cell proliferation through the regulation of autophagy.
  • To investigate the impact of FoxM1 downregulation on autophagy and cell proliferation in the sw480 colon cancer cell line.

Main Methods:

  • Short hairpin RNA (shRNA) was utilized to knock down FoxM1 expression in sw480 cells.
  • Autophagy levels were assessed by measuring the expression of autophagy markers LC3 and P62.
  • Cell proliferation was evaluated in FoxM1-downregulated cells.

Main Results:

  • Downregulation of FoxM1 led to a significant inhibition of autophagy in sw480 cells compared to control groups.
  • Further analysis indicated that reduced FoxM1 levels mimic the effects of known autophagy inhibitors.
  • Inhibition of FoxM1 expression resulted in decreased cell proliferation within the sw480 colon cancer cell line.

Conclusions:

  • FoxM1 plays a crucial role in promoting colon cancer cell proliferation, partly through the modulation of autophagy.
  • Targeting FoxM1 could represent a potential therapeutic strategy for colon cancer by disrupting both cell proliferation and autophagy pathways.
Keywords:
autophagycolon cancerproliferationshFoxM1sw480 cell line

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