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miR-133 is a key negative regulator of CDC42-PAK pathway in gastric cancer

Zhenguo Cheng1, Funan Liu2, Guanqiao Wang1

  • 1Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang 110001, China.

Cellular Signalling
|August 26, 2014
PubMed

Insights

MicroRNA-133 (miR-133) targets cell division cycle 42 (CDC42), inhibiting gastric cancer progression. Downregulation of miR-133 correlates with advanced tumor features and poor survival, suggesting therapeutic potential.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • Cell division cycle 42 (CDC42) and P21-activated kinases (PAKs) are crucial in cell processes and implicated in cancer.
  • The negative regulatory mechanisms of the CDC42/PAKs pathway in tumorigenesis are not fully understood.

Purpose of the Study:

  • To investigate the role of miR-133 in regulating CDC42 and its impact on gastric cancer.
  • To explore the clinical significance of miR-133 in gastric cancer tissues.

Main Methods:

  • Identification of miR-133 as a regulator of CDC42.
  • Overexpression of miR-133 in cancer cells to assess effects on proliferation and migration.
  • Analysis of miR-133 expression in gastric cancer tissues and correlation with clinical parameters.

Main Results:

  • miR-133 directly targets and downregulates CDC42 expression and PAKs activation.
  • miR-133 overexpression inhibits gastric cancer cell proliferation and migration.
  • miR-133 is downregulated in gastric cancer tissues and inversely associated with tumor size, invasion depth, and metastasis.
  • Low miR-133 expression is an independent prognostic factor for overall survival.

Conclusions:

  • miR-133 acts as a tumor suppressor in gastric cancer by targeting the CDC42/PAKs pathway.
  • Restoring miR-133 levels may offer a novel therapeutic strategy for gastric cancer.
Keywords:
ActivationCDC42Gastric cancerInvasionmiR-133p21-activated kinase

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