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Tetrandrine Exerts a Radiosensitization Effect on Human Glioma through Inhibiting Proliferation by Attenuating ERK

Ji-Wei Ma1, Yong Zhang1, Ji-Cheng Ye1

  • 1Division of Pathology, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Medical College, Jinan University, Guangzhou 510632, China.

Biomolecules & Therapeutics
|November 11, 2016
PubMed

Insights

Tetrandrine (Tet) enhances radiation therapy for human glioma cells by inhibiting proliferation and cell cycle progression. This effect is mediated by the ERK signaling pathway, offering a potential new strategy for glioma treatment.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • Tetrandrine (Tet) is a bisbenzylisoquinoline alkaloid with known radiosensitization effects on tumors.
  • The specific mechanisms by which Tet affects human glioma cells and enhances radiosensitivity are not well understood.

Purpose of the Study:

  • To investigate the radiosensitization effect of Tet on human glioma cells.
  • To elucidate the molecular mechanisms underlying Tet's radiosensitization, focusing on cell cycle, DNA repair, and the role of ERK signaling.

Main Methods:

  • Flow cytometry was used to analyze the cell cycle.
  • Immunofluorescence detected phosphorylated H2AX expression to assess DNA repair.
  • Western blot analysis investigated the involvement of ERK signaling.

Main Results:

  • Tetrandrine demonstrated a radiosensitization effect on human glioma cells.
  • Tet inhibited glioma cell proliferation and induced cell cycle arrest at the G0/G1 phase.
  • Tet reduced the expression of phosphorylated ERK and its downstream targets, indicating ERK pathway involvement.

Conclusions:

  • Tetrandrine exerts radiosensitization in human glioma cells.
  • The mechanism involves inhibition of cell proliferation and cell cycle arrest at G0/G1 phase.
  • The extracellular signal-regulated kinase (ERK) pathway plays a crucial role in mediating Tet's radiosensitizing effects on glioma cells.
Keywords:
ERKGliomaProliferationRadiosensitizationTetrandrine

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