Korean J Intern Med.
2008 Sep;23(3):116-120. 10.3904/kjim.2008.23.3.116.
Clinical significance of insulin-like growth factor-1 receptor expression in stage I non-small-cell lung cancer: immunohistochemical analysis
- Affiliations
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- 1Department of Internal Medicine1, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea.
- 2Human Barrier Research Institute, Yonsei University College of Medicine, Seoul, Korea. yschang@yuhs.ac
- 3Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
- 4Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
- KMID: 759967
- DOI: http://doi.org/10.3904/kjim.2008.23.3.116
Abstract
- BACKGROUND/AIMS: The insulin-like growth factor (IGF) system has been implicated in tumor growth, invasion, and metastasis. However, reports on the IGF-1 receptor (IGF-1R) based on radioimmunoassays are conflicting, and its prognostic implications in non-small-cell lung cancer (NSCLC) are still controversial. METHODS: Seventy-one paraffin-embedded tissue sections from stage I NSCLC patients were stained using a mouse monoclonal antibody against human IGF-1R. RESULTS: The intensity and frequency of IGF-1R expression on the membrane and cytoplasm of cancer cells was evaluated and scored using a semiquantitative system. IGF-1R expression was detected in nine of 71 (12.7%) cases. No significant relationship was found between clinical/histopathological parameters and IGF-1R expression. None of the patients whose tumor expressed IGF-1R had experienced distant metastasis or cancer-related death, although the difference did not reach statistical significance. CONCLUSIONS: We conclude that IGF-1R expression may not be a major prognostic factor for stage I NSCLC.
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