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miR-217 inhibits triple-negative breast cancer cell growth, migration, and invasion through targeting KLF5

Wenhui Zhou1,2,3, Fangfang Song3,4, Qiuju Wu3,4

  • 1Third Clinical College, Southern Medical University, Guangdong Province, Guangzhou, China.

Plos One
|April 25, 2017
PubMed

Insights

MicroRNA-217 (miR-217) suppresses triple-negative breast cancer (TNBC) growth by down-regulating KLF5. This miR-217-KLF5 interaction offers a potential therapeutic target for aggressive TNBC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • Triple-negative breast cancer (TNBC) is an aggressive subtype lacking targeted therapies.
  • KLF5 is implicated in TNBC progression, but its microRNA-mediated regulation is unclear.

Purpose of the Study:

  • To investigate the role of microRNA-217 (miR-217) in regulating KLF5 expression in TNBC.
  • To explore the functional consequences of miR-217-mediated KLF5 suppression on TNBC cell behavior.

Main Methods:

  • Utilized TNBC cell lines (HCC1806, HCC1937).
  • Assessed the impact of miR-217 on KLF5, FGF-BP, and Cyclin D1 expression.
  • Evaluated miR-217's effects on TNBC cell proliferation, migration, and invasion.

Main Results:

  • miR-217 was found to down-regulate KLF5 expression in TNBC cells.
  • Suppression of KLF5 by miR-217 led to decreased expression of its downstream targets, FGF-BP and Cyclin D1.
  • miR-217 significantly inhibited TNBC cell growth, migration, and invasion.

Conclusions:

  • miR-217 suppresses TNBC progression, at least partially, by down-regulating KLF5.
  • The miR-217-KLF5 axis represents a promising therapeutic target for triple-negative breast cancer treatment.

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