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MicroRNA-503 Inhibits Non-Small Cell Lung Cancer Progression By Targeting PDK1/PI3K/AKT Pathway

Yingying Wei1, Yuanfan Liao2, Yu Deng2

  • 1Department of Pharmacy, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.

Oncotargets and Therapy
|December 6, 2019
PubMed
Abstract

Insights

MicroRNA miR-503 is downregulated in non-small-cell lung cancer (NSCLC). Restoring miR-503 inhibits NSCLC progression by targeting PDK1 and the PI3K/AKT pathway, suggesting its therapeutic potential.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Non-small-cell lung cancer (NSCLC) is a leading cause of cancer-related mortality.
  • MicroRNAs (miRNAs) play crucial roles in cancer development and progression.
  • Dysregulation of specific miRNAs, like miR-503, is implicated in various cancers.

Purpose of the Study:

  • To investigate the role of miR-503 in non-small-cell lung cancer (NSCLC).
  • To elucidate the underlying molecular mechanism of miR-503's action in NSCLC.
  • To evaluate miR-503 as a potential biomarker and therapeutic target for NSCLC.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) and in situ hybridization (ISH) for miR-503 expression analysis.
  • Cell proliferation, colony formation, and apoptosis assays to assess miR-503 function.
  • Dual luciferase reporter assay, Western blotting, and immunohistochemistry to identify and validate miR-503 targets and pathways.

Main Results:

  • miR-503 expression was significantly downregulated in NSCLC tissues and cell lines.
  • Overexpression of miR-503 inhibited NSCLC cell proliferation, migration, and invasion.
  • miR-503 directly targets PDK1, inhibiting the PDK1/PI3K/AKT signaling pathway and suppressing tumor progression.

Conclusions:

  • miR-503 acts as a tumor suppressor in NSCLC by targeting PDK1 and inhibiting the PI3K/AKT pathway.
  • Restoring miR-503 expression can impede NSCLC progression.
  • miR-503 holds promise as a diagnostic biomarker and therapeutic agent for NSCLC.
Keywords:
PDK1miR-503mortalitynon-small cell lung cancerproliferation

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