IGF-I is an important growth factor for the mammary gland. We evaluated the relationship of the IGF-I CAnpolymorphism with breast cancer risk in Caucasian postmenopausal women and performed a meta-analysis of published data. The IGF-I CAnpolymorphism was genotyped in 4091 from the Rotterdam Study. A disease-free survival analysis was performed along with a meta-analysis of all available data on IGF-I CAnpolymorphism and breast cancer risk. During follow-up 159 women were diagnosed with breast cancer. The disease-free survival analysis adjusted for age at entry, age at menopause, body mass index and waist hip ratio yielded a HR = 0.97 (95% CI=0.59-1.58) for CA19non-carriers against carriers. The meta-analysis using the random-effects model gave a pooled OR of 1.26 (95% CI = 0.95-1.82) for IGF-I CA19non-carriers versus CA19homozygous carriers. According to these results, the IGF-I CA19promoter polymorphism is not likely to predict the risk of breast cancer.

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Keywords Breast cancer, Insulin-like growth factor 1, Polymorphism
Persistent URL dx.doi.org/10.1016/j.ejca.2007.04.026, hdl.handle.net/1765/36446
Citation
González-Zuloeta Ladd, A.M, Liu, F, Houben, M.P.W.A, Arias-Vásquez, A, Siemes, C, Janssens, A.C.J.W, … Tikka-Kleemola, P. (2007). IGF-1 CA repeat variant and breast cancer risk in postmenopausal women. European Journal of Cancer, 43(11), 1718–1722. doi:10.1016/j.ejca.2007.04.026