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MiR-124 Inhibits Growth and Enhances Radiation-Induced Apoptosis in Non-Small Cell Lung Cancer by Inhibiting STAT3

Mengjie Wang1,2, Bi Meng1,2, Yangchen Liu2

  • 1Bengbu Medical School, Bengbu, China.

Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology
|December 14, 2017
PubMed
Abstract

Insights

MicroRNA-124 (miR-124) is downregulated in non-small-cell lung carcinoma (NSCLC) and enhances radiosensitivity by targeting STAT3. Restoring miR-124 may improve radiation therapy for NSCLC patients.

Area of Science:

  • Molecular Biology
  • Oncology
  • Radiotherapy Research

Background:

  • MicroRNAs (miRNAs) are increasingly recognized for their role in cellular responses to ionizing radiation (IR).
  • Abnormal miRNA expression is implicated in cancer development and treatment resistance.
  • Non-small-cell lung carcinoma (NSCLC) radiosensitivity is a critical factor in treatment outcomes.

Purpose of the Study:

  • To investigate the correlation between miR-124 expression and radiosensitivity in NSCLC.
  • To elucidate the molecular mechanisms underlying miR-124's effect on NSCLC radiosensitivity.

Main Methods:

  • Quantitative reverse transcription polymerase chain reaction (RT-PCR) for miR-124 expression analysis.
  • Cell proliferation (CCK-8) and apoptosis assays (flow cytometry) to assess miR-124 function.
  • Luciferase activity, RT-PCR, and Western blot assays to identify and validate miR-124 targets.

Main Results:

  • miR-124 was significantly downregulated in NSCLC tissues and cell lines.
  • miR-124 suppressed NSCLC cell proliferation and promoted apoptosis following ionizing radiation exposure.
  • Signal transducer and activator of transcription 3 (STAT3) was identified as a direct target of miR-124.
  • STAT3 overexpression reversed the radiosensitizing effects of miR-124 in NSCLC cells.

Conclusions:

  • miR-124 plays a crucial role in regulating NSCLC radiosensitivity.
  • Targeting STAT3 by miR-124 offers a potential therapeutic strategy to enhance radiosensitivity in NSCLC.
  • miR-124 represents a promising biomarker and therapeutic target for improving radiation therapy efficacy in NSCLC.
Keywords:
MiR-124Non-small-cell lung carcinomaRadiosensitivity

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