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Inhibition of SHP-2 promotes radiosensitivity in glioma

Quanye Sun1, Luyan Mu1, Wanchen Qiao1

  • 1Department of Neurosurgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.

Molecular Medicine Reports
|May 26, 2015
PubMed

Insights

Silencing SHP-2 (a protein tyrosine phosphatase) inhibits glioma cell proliferation, invasion, and vasculogenic mimicry, suggesting it is a potential therapeutic target for glioma radiosensitivity.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • SHP-2 is a protein tyrosine phosphatase regulating cell functions like growth, division, adhesion, and motility.
  • SHP-2's role in angiogenesis suggests it may influence glioma response to radiotherapy.
  • Understanding SHP-2's function is crucial for developing targeted glioma therapies.

Purpose of the Study:

  • To investigate the function of SHP-2 in the radiosensitivity of glioma.
  • To determine if SHP-2 plays a role in glioma cell proliferation, apoptosis, invasion, and vasculogenic mimicry.

Main Methods:

  • Glioma cell lines (U251, U87, SHG44) were transfected with small interfering RNA (siRNA) targeting SHP-2.
  • Cell proliferation was assessed using a cell counting kit 8 assay.
  • Apoptosis was evaluated by fluorescence-activated cell sorting and immunoblotting.
  • Cell invasion and vasculogenic mimicry were assessed using invasion and tube formation assays, respectively.

Main Results:

  • SHP-2 siRNA transfection significantly reduced proliferation and increased apoptosis in glioma cell lines.
  • Downregulation of SHP-2 suppressed glioma cell invasion and vasculogenic mimicry.
  • No significant difference in SHP-2 expression was observed between glioma and normal brain tissues.

Conclusions:

  • SHP-2 downregulation inhibits key malignant behaviors in glioma cells, including proliferation, invasion, and vasculogenic mimicry.
  • SHP-2 plays a significant role in glioma radiosensitivity.
  • SHP-2 represents a potential novel therapeutic target for glioma treatment.

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