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MicroRNA-184 promotes proliferation ability of glioma cells by regulating FOXO3

Qing-Ke Cui1, Wei-Dong Liu2, Jian-Xin Zhu2

  • 1Department of Neurosurgery, The Qilu Hospital of Shandong University, Jinan, Shandong, 250012, P. R. China; Liaocheng People's Hospital, Liaocheng, Shandong, 252000, P. R. China.

Asian Pacific Journal of Tropical Medicine
|August 18, 2014
PubMed
Abstract

Insights

MicroRNA-184 (miR-184) plays a crucial role in glioma development. Lower miR-184 levels correlate with increased glioma cell proliferation, impacting cell cycle proteins and tumor growth.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • Gliomas are primary brain tumors with complex molecular underpinnings.
  • MicroRNAs (miRNAs) are key regulators of gene expression implicated in various cancers.
  • Dysregulation of specific miRNAs, like miR-184, may contribute to glioma pathogenesis.

Purpose of the Study:

  • To investigate the regulatory role of microRNA-184 (miR-184) in glioma cell genesis, development, and proliferation.
  • To elucidate the impact of miR-184 on cell cycle-related proteins in glioma.

Main Methods:

  • Transfection of glioma cell lines with miR-184 mimic and inhibitor using lipidosomes.
  • Assessment of cell proliferation via MTT and plate cloning assays.
  • Western blot (WB) analysis for cyclinD1, p27, and FOXO3 expression.
  • Quantitative PCR (QPCR) for miR-184 expression in cell lines and tissues.
  • Luciferase reporter assays to confirm direct targeting of FOXO3 by miR-184.

Main Results:

  • Significantly lower miR-184 expression was observed in glioma cell lines and tissues compared to adjacent tissues.
  • Overexpression of miR-184 increased glioma cell proliferation (U87, T98G), while inhibition decreased it.
  • miR-184 modulated cell cycle proteins: increased cyclinD1 and decreased p27 upon overexpression; decreased cyclinD1 and increased p27 upon inhibition.
  • Luciferase assays confirmed miR-184 targets the 3'UTR of FOXO3, inhibiting its activity.

Conclusions:

  • MicroRNA-184 significantly influences glioma cell proliferation and regulates key cell cycle proteins.
  • miR-184 plays a critical role in the occurrence and progression of gliomas.
  • These findings highlight miR-184 as a potential therapeutic target for glioma treatment.
Keywords:
Cell proliferationFOXO3GliomamiR-184

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