Abstract 2767: Genetic variation in obesity-related genes ADBR2, ADBR3, GHRL, HSD11B1, and SHC1 and risk of prostate cancer: A VA case-control study
Publication
, Journal Article
Masko, EM; Moreira, DM; Banez, LL; Hoyo, C; Grant, DJ; Calloway, EE; Shuler, KH; Newman, KA; Gaines, AR; Taylor, LA; Robertson, CN; Freedland, SJ
Published in: Cancer Research
INTRODUCTION: Single nucleotide polymorphisms (SNPs) are single nucleotide variations that occur within alleles among individuals. It is believed that SNPs may predispose a person to diseases such as obesity or cancer. One study showed that SNPs within genes linked with obesity were also associated with breast cancer risk. As prostate cancer (PC) mortality is linked with obesity, we determined if SNPs within 5 obesity-related genes were also linked to PC risk in a similar manner to the breast cancer study.METHODS: A total of 53 SNPs were tagged in the genes ADBR2, ADBR3, GHRL, HSD11B1, and SHC1 using the program HAPMAP. DNA collected from 216 subjects (108 incident cases, 108 “healthy” controls) from the Durham VA Hospital were then genotyped for these SNPs. Cases and controls were frequency matched on age and BMI. Logistic regression models were used to determine the risk of obesity (BMI >30 kg/m2) and PC (and high-grade defined as Gleason >7 vs. low-grade/control) for each SNP, adjusting for age and race.RESULTS: In our study population, 83 men were Caucasian and 133 African American. There was no significant differences in age (p=0.18), race (p=0.96), and BMI (p=0.12) for cases and controls. Among the 53 SNPs genotyped, 5 SNPs in ADRB2, ADRB3, and SHC1 were associated with an increased risk of PC (OR 1.88-2.21; p=0.01-0.04), particularly high-grade disease (OR 2.50-3.26; p=0.0004-0.05). Another 4 SNPs in ADRB2 and HSD11B1 were associated with a decreased risk of PC (p=0.01-0.05). A total of 7 SNPs were associated with an increased risk of obesity (p=0.004-0.02).CONCLUSION: In this small pilot study, we found 14 of the 53 analyzed single SNPs in genes previously linked with obesity that were associated with PC risk, both positively and negatively at an alpha of <0.05. This is more than the 3 SNPs that would be predicted based upon random chance. Future studies will validate these results in an independent cohort, with the hope of further confirming SNPs that may be used for personalized medicine as well as providing a genetic link between obesity and PC.Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 2767. doi:10.1158/1538-7445.AM2011-2767
