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Dysregulation of GIMAP genes in non-small cell lung cancer

Yu-Ming Shiao1, Ya-Hui Chang, Yen-Ming Liu

  • 1Faculty of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan.

Lung Cancer (Amsterdam, Netherlands)
|May 9, 2008
PubMed

Insights

The GTPase of the immunity-associated protein (GIMAP) gene family shows reduced expression in non-small cell lung cancer (NSCLC) tumors. This finding suggests GIMAP genes may play a role in NSCLC development and immune response.

Area of Science:

  • Genetics
  • Immunology
  • Oncology

Background:

  • The GTPase of the immunity-associated protein (GIMAP) gene family comprises seven members on human chromosome 7.
  • GIMAP proteins are GTP-binding proteins with largely unknown functions, though Gimap4 is implicated in T cell apoptosis.

Purpose of the Study:

  • To investigate the expression patterns of GIMAP genes in non-small cell lung cancer (NSCLC).
  • To explore the potential role of GIMAP genes in NSCLC pathogenesis and immune response.

Main Methods:

  • Pilot microarray analysis of GIMAP gene expression in six NSCLC cases.
  • Quantitative PCR (qPCR) validation in twenty NSCLC samples.
  • Comparison of GIMAP expression in tumor, adjacent non-tumor, and control lung tissues.

Main Results:

  • GIMAP gene expression was uniformly lower in NSCLC tumor tissues compared to adjacent non-tumor tissues.
  • GIMAP6 and GIMAP8 showed significantly reduced expression in tumors.
  • GIMAP8 mRNA levels were elevated in adjacent non-tumor tissues relative to control lung tissues.

Conclusions:

  • Reciprocal expression patterns of GIMAP genes in NSCLC suggest their involvement in the disease.
  • The GIMAP gene family may contribute to the pathogenesis and immune reactions associated with NSCLC.

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