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Aberrant GIMAP2 expression affects oral squamous cell carcinoma progression by promoting cell cycle and inhibiting

Mari Komatsu1, Kengo Saito2, Isao Miyamoto3

  • 1Department of Oral Science, Chiba University, Chiba 260-8670, Japan.

Oncology Letters
|January 7, 2022
PubMed

Insights

GTPases of immunity-associated protein 2 (GIMAP2) is upregulated in oral squamous cell carcinoma (OSCC). GIMAP2 knockdown inhibits OSCC cell growth and promotes apoptosis, suggesting it is a potential OSCC biomarker.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • GTPases of immunity-associated protein 2 (GIMAP2) is linked to T cell survival.
  • The role of GIMAP2 in oral squamous cell carcinoma (OSCC) is not well understood.

Purpose of the Study:

  • To investigate the expression and molecular mechanisms of GIMAP2 in OSCC.
  • To determine if GIMAP2 plays a role in OSCC development and apoptosis.

Main Methods:

  • Reverse transcription quantitative PCR (RT-qPCR) to assess GIMAP2 mRNA levels.
  • Immunoblotting and immunohistochemistry to evaluate GIMAP2 protein expression.
  • GIMAP2 knockdown experiments in OSCC cell lines.

Main Results:

  • GIMAP2 expression was significantly upregulated in OSCC cell lines and tissues compared to normal controls.
  • GIMAP2 knockdown led to decreased cell growth, cell cycle arrest (downregulation of CDK4, CDK6, p-Rb; upregulation of p53, p21).
  • GIMAP2 knockdown affected anti-apoptotic functions by upregulating Bcl-2 and downregulating Bax and Bak.

Conclusions:

  • GIMAP2 significantly influences OSCC development by promoting cell proliferation and inhibiting apoptosis.
  • GIMAP2 is a potential diagnostic biomarker for oral squamous cell carcinoma.
Keywords:
G1 phase cell cycle arrestGTPases of immunity-associated proteins 2anti-apoptosisoral squamous cell carcinomap53tumor progression

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