Please use this identifier to cite or link to this item:
|Title:||Insulin-like growth factor-1 promoter polymorphisms and colorectal cancer: A functional genomics approach||Authors:||Wong, H.-L.
Van Den Berg, D.
|Issue Date:||Aug-2008||Citation:||Wong, H.-L., Koh, W.-P., Probst-Hensch, N.M., Van Den Berg, D., Yu, M.C., Ingles, S.A. (2008-08). Insulin-like growth factor-1 promoter polymorphisms and colorectal cancer: A functional genomics approach. Gut 57 (8) : 1090-1096. ScholarBank@NUS Repository. https://doi.org/10.1136/gut.2007.140855||Abstract:||Rationale: Insulin-like growth factor-1 (IGF1) has been proposed to mediate the obesity-related carcinogenic effects of "Western lifestyle". While genetic factors explain at least half of inter-individual IGF1 variation, the IGF1 polymorphisms hypothesised to underlie the variation in cancer incidence rates remain ill-defined. Methods: We used a comparative genomics approach to identify putative regulatory polymorphisms in the IGF1 promoter region within a rapidly westernising population, the Singapore Chinese. Association of IGF1 genotype with colorectal cancer risk was assessed among 298 colorectal cancer cases and 1142 controls nested within the Singapore Chinese Health Study. Results: We identified a common (minor allele frequency = 0.36) single-nucleotide polymorphism (SNP), IGF1-2995 C/A, within a consensus domain for an octamer binding factor (Oct1/Oct2) transcription factor binding site. Possession of one or two copies of the minor allele (genotypes AA and CA) conferred an approximate 40% decrease in risk in comparison to genotype CC (odds ratio, 0.59; 95% confidence interval, 0.45 to 0.77). This association was stronger for colon cancer than for rectal cancer (pheterogeneity< 0.001) and for those who were physically active versus inactive (p interaction = 0.05). Models including other previously identified promoter polymorphisms did not provide a better prediction of colorectal cancer risk. Conclusions: Our results support the hypotheses that IGF1 plays a role in colonic carcinogenesis and that genetically inherited variation in IGF1 expression influences risk of colorectal cancer.||Source Title:||Gut||URI:||http://scholarbank.nus.edu.sg/handle/10635/109418||ISSN:||00175749||DOI:||10.1136/gut.2007.140855|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 27, 2023
WEB OF SCIENCETM
checked on Jan 19, 2023
checked on Jan 26, 2023
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.