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MicroRNA-29a functions as a potential tumor suppressor through directly targeting CDC42 in non-small cell lung cancer

Yongqiang Li1, Zhi Wang2, Yijiang Li2

  • 1Department of Emergency, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710038, P.R. China.

Oncology Letters
|May 20, 2017
PubMed

Insights

MicroRNA-29a (miR-29a) is downregulated in non-small cell lung cancer (NSCLC), inhibiting tumor suppressor activity. Restoring miR-29a levels suppresses NSCLC progression by targeting cell division cycle 42 (CDC42).

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • MicroRNA-29a (miR-29a) dysregulation is implicated in various cancers.
  • Its role in non-small cell lung cancer (NSCLC) requires further elucidation.

Purpose of the Study:

  • To investigate the expression, function, and molecular mechanism of miR-29a in NSCLC.
  • To determine if cell division cycle 42 (CDC42) is a direct target of miR-29a.

Main Methods:

  • Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) for miR-29a and CDC42 mRNA expression.
  • Cell Counting Kit-8, migration, and invasion assays for proliferation, migration, and invasion.
  • Bioinformatics analysis and dual-luciferase reporter assays to confirm CDC42 as a miR-29a target.
  • Western blotting for CDC42 protein expression.

Main Results:

  • miR-29a was significantly downregulated in NSCLC, correlating with advanced tumor stage and metastasis.
  • Overexpression of miR-29a inhibited NSCLC cell proliferation, migration, and invasion.
  • CDC42 was validated as a direct target of miR-29a.
  • Knockdown of CDC42 partially mimicked the tumor-suppressive effects of miR-29a.

Conclusions:

  • miR-29a acts as a tumor suppressor in NSCLC by directly targeting CDC42.
  • miR-29a warrants further investigation as a potential therapeutic target for NSCLC.
Keywords:
cell division cycle 42microRNA-29anon-small cell lung cancertargeted therapy

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