Abstract
Purpose
Insulin-like growth factor 1 (IGF1) is a peptide growth factor that promotes cell proliferation and inhibits apoptosis. The bioavailability of IGF1 is regulated by the insulin-like growth factor binding protein 3 (IGFBP3). The purpose of this study was to examine the association of genetic variants in IGF1 (rs6214, rs6220, and rs35767) and IGFBP3 (rs2854744 and rs2854746) with risk of colorectal polyps and colorectal cancer.
Methods
In this ongoing colorectal cancer study of Austria (CORSA), a total of 3,360 Caucasian participants, consisting of 178 colorectal cancer patients, 328 patients with high risk polyps, 1,059 patients with low risk colorectal polyps, and 1,795 colonoscopy-negative controls, were recruited within a large colorectal screening project in the province Burgenland and from three hospitals in Vienna. Multiple logistic regression was applied to compare individuals of the control group against three different risk groups, namely, colorectal cancer group, high risk polyp group, and low risk polyp group.
Results
Carriers of the homozygous polymorphic genotype of the SNP rs6214 were associated with an increased colorectal risk (OR = 1.79, 95% CI 1.04–1.90) compared to the colonoscopy-negative controls; this was also found when combining colorectal cancer cases and high risk polyp group (OR = 1.39, 95% CI 1.01–1.90).
Conclusion
Our results suggest that the SNP rs6214 of IGF1 could have an impact on developing colorectal cancer and colorectal polyps with villous elements.
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Abbreviations
- CRC:
-
Colorectal cancer
- CORSA:
-
Colorectal cancer study of Austria
- IGF1:
-
Insulin-like growth factor 1
- IGFBP3:
-
Insulin-like growth factor binding protein 3
- SNP:
-
Single nucleotide polymorphism
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Acknowledgments
We thank Marlies Pusman for excellent recruitment of patients and Martin Preyer for genotyping. Furthermore, we thank all physicians involved in this study for data management and blood sampling. This study was supported by a grant from “Österreichische Krebshilfe.”
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The study was approved by the institutional review boards at the Medical University of Vienna and Burgenland.
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Feik, E., Baierl, A., Hieger, B. et al. Association of IGF1 and IGFBP3 polymorphisms with colorectal polyps and colorectal cancer risk. Cancer Causes Control 21, 91–97 (2010). https://doi.org/10.1007/s10552-009-9438-4
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DOI: https://doi.org/10.1007/s10552-009-9438-4