Lee CY, Jeon JH, Kim HJ, Shin DH, Roh TW, Ahn CM, Chang YS. Clinical significance of insulin-like growth factor-1 receptor expression in stage I non-small-cell lung cancer: immunohistochemical analysis.
Korean J Intern Med 2008;
23:116-20. [PMID:
18787363 PMCID:
PMC2686961 DOI:
10.3904/kjim.2008.23.3.116]
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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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