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. 2012 May;82(5):288-95.
doi: 10.4174/jkss.2012.82.5.288. Epub 2012 Apr 26.

Clinical significance of insulin-like growth factor gene polymorphisms with survival in patients with gastrointestinal stromal tumors

Ohkyoung Kwon  1 , Ho Young Chung, Wansik Yu, Han Ik Bae, Yee Soo Chae, Jong Gwang Kim, Byung Woog Kang, Won Ki Lee
Affiliations

Clinical significance of insulin-like growth factor gene polymorphisms with survival in patients with gastrointestinal stromal tumors

Ohkyoung Kwon et al. J Korean Surg Soc. 2012 May.

Abstract

Purpose: Insulin-like growth factors (IGFs) regulate a wide range of biological functions including cell proliferation, differentiation, and apoptosis through paracrine and autocrine mechanisms. Accordingly, the present study analyzed polymorphisms of IGF genes and their impact on the prognosis for patients with gastrointestinal stromal tumors (GISTs).

Methods: Two hundred-thirteen consecutive patients with GISTs who underwent curative surgery from 5 medical centers were enrolled in the present study. The genomic DNA was extracted from paraffin-embedded tumor tissue, and four IGF-1 (+2995C/A, +533C/T, IVS2-16540A/G, Ex4-177G/C) and one IGF-2 (IVS1+1280A/G) gene polymorphisms were determined using a Sequenom MassARRAY system.

Results: With a median follow-up of 18.4 months, the estimated 5-year relapse-free survival and overall survival rates were 69.9% and 86.7%, respectively. In a multivariate analysis including age, gender, primary site of disease, pathology, and risk stratification, no significant association was observed between the polymorphism of the IGF-1 and IGF-2 genes and survival.

Conclusion: None of the five IGF-1 and IGF-2 gene polymorphisms investigated in this study was found to be an independent prognostic marker for Korean patients with surgically resected GIST. However, further studies on a larger scale are warranted to clarify the role of IGF-1 and IGF-2 gene polymorphisms as a prognostic biomarker for GIST patients.

Keywords: Gastrointestinal stromal tumor; Insulin-like growth factor; Prognosis; Single nucleotide polymorphism.

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Conflict of interest statement

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1
Survival curves for all patients.
Fig. 2
Fig. 2
Survival curves of overall survival (A) and relapse-free survival (B) according to National Institutes of Health consensus classification system.
See this image and copyright information in PMC

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