PMID- 17058024 OWN - NLM STAT- MEDLINE DCOM- 20071127 LR - 20151119 IS - 0167-6806 (Print) IS - 0167-6806 (Linking) VI - 104 IP - 2 DP - 2007 Aug TI - A multigenic approach to predict breast cancer risk. PG - 159-64 AB - In the biology of complex disorders, such as breast cancer, interactions among genetic factors may play an important role and theoretical considerations suggest that gene-gene interactions are quite common in such diseases. In this case-control study with 500 breast cancer patients and 500 population-based healthy sex- and age-matched control subjects, we applied a multigenic approach to examine the associations with breast cancer risk of a comprehensive panel of 16 selected polymorphisms in a variety of pathways using classification tree analysis (CART). Overall, 79.6% of all breast cancer patients and 80.6% of all control subjects were correctly classified on the basis of their individual genetic profile by the classification procedure. CART analysis of the data identified the heterozygous vascular endothelial growth factor (VEGF) and matrix metalloproteinase 3 (MMP3) genotype and homozygous cyclooxygenase-2 (PTGS2) mutant as the initial splits, indicating that these genotypes exert the greatest impact on the classification process. Breast cancer patients were primarily indicated by 30 distinct genetic profiles. The odds ratio of these genetic risk profiles for breast cancer was 16.12 (95% confidence interval 11.09-23.49). Five genetic profiles formed homogenous breast cancer subgroups and represented highest risk genetic profiles. This is the first comprehensive study to use a multigenic analysis for breast cancer and the data suggest that individuals with distinct genetic profiles are at an increased risk for breast cancer, confirming the importance of taking a multigenic approach for risk assessment. FAU - Gerger, Armin AU - Gerger A AD - Department of Internal Medicine, Division of Oncology, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria. armin.gerger@klinikum-graz.at FAU - Langsenlehner, Uwe AU - Langsenlehner U FAU - Renner, Wilfried AU - Renner W FAU - Weitzer, Werner AU - Weitzer W FAU - Eder, Tanja AU - Eder T FAU - Yazdani-Biuki, Babak AU - Yazdani-Biuki B FAU - Hofmann, Gunter AU - Hofmann G FAU - Samonigg, Hellmut AU - Samonigg H FAU - Krippl, Peter AU - Krippl P LA - eng PT - Comparative Study PT - Journal Article DEP - 20061021 PL - Netherlands TA - Breast Cancer Res Treat JT - Breast cancer research and treatment JID - 8111104 RN - 0 (Biomarkers, Tumor) SB - IM MH - Biomarkers, Tumor/*genetics MH - Breast/metabolism MH - Breast Neoplasms/*genetics MH - Case-Control Studies MH - Female MH - Genetic Predisposition to Disease MH - Genotype MH - Humans MH - *Polymorphism, Genetic MH - Risk Factors EDAT- 2006/10/24 09:00 MHDA- 2007/12/06 09:00 CRDT- 2006/10/24 09:00 PHST- 2006/08/04 00:00 [received] PHST- 2006/09/14 00:00 [accepted] PHST- 2006/10/24 09:00 [pubmed] PHST- 2007/12/06 09:00 [medline] PHST- 2006/10/24 09:00 [entrez] AID - 10.1007/s10549-006-9408-4 [doi] PST - ppublish SO - Breast Cancer Res Treat. 2007 Aug;104(2):159-64. doi: 10.1007/s10549-006-9408-4. Epub 2006 Oct 21.