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Title:   Author  item
                                            LEE, CRAIG - NIH, ENVIRO HEALTH SCI.item
                                            NORTH, KARI - EPIDEMIOLOGY, NIHitem
                                            BRAY, MOLLY - BAYLOR CHILDRENS NUTR.item
                                            FORNAGE, MYRIAM - UNIV. TX, MOLE. MED.item
                                            SEUBERT, JOHN - NIH, ENVIRO HEALTH SCIitem
                                            Newman, Johnitem
                                            HAMMOCK, BRUCE - UCD, CANCER RES. CNT.item
                                            COUPER, DAVID - UNIV NC, BIOSTATISTICSitem
                                            HEISS, GERARDO - UNIV NC, EPIDEMIOLOGYitem
                                            ZELDIN, DARRYL - NIH, ENVIRO. HEALTH SCI.
  Submitted to: Human Molecular Genetics
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 3/28/2006
                                    Publication  Date: 4/4/2006
                                    Citation: Lee, C.R., North, K.E., Bray, M.S., Fornage, M., Seubert, J.M., Newman, J.W., Hammock, B.D., Couper, D.J., Heiss, G., Zeldin, D.C. Genetic variation in soluble epoxide hydrolase (EPHX2) and risk of coronary heart disease: The Atherosclerosis Risk in Communities (ARIC) study. Human Molecular Genetics. 15(10): 1640-1649, 2006.Interpretive Summary: Significant baseline differences in various risk factors were observed between incident CHD cases and non-cases included in the cohort random sample.  Cases were significantly older and more likely to be male, cigarette smokers, diabetic, hypertensive and have abnormal fasting lipid panels compared with non-cases.
                                Technical Abstract: Endothelial dysfunction contributes to the development of coronary heart disease (CHD). Soluble epoxide hydrolase metabolizes epoxyeicosatrienoic acids in the vasculature and regulates endothelial function. We sought to determine whether genetic variation in soluble epoxide hydrolase (EPHX2) was associated with the risk of CHD. We genotyped 2065 Atherosclerosis Risk in Communities study participants (1085 incident CHD cases, 980 non-cases) for 10 previously identified polymorphism in EPHX2. Using a case-cohort design, associations between incident CHD risk and both non-synonymous EPHX2 polymorphisms and phase-reconstructed haplotypes were evaluated using proportional hazards regression. Individuals carrying the K55R polymorphism variant allele demonstrated higher apparent soluble epoxide hydrolase activity in vivo. Presence of the K55R variant allele was significantly more common among Caucasian CHD cases when compared with non-cases (20.8% versus 15.3%, respectively, P=0.012), and was associated with significantly higher risk of incident CHD (adjusted hazard rate ratio 1.45, 95% confidence interval 1.05-2.01, P = 0.026). A significant association between the K55R variant allele and risk of CHD was not observed in African-Americans. The distribution of reconstructed haplotypes were significantly different in Caucasian cases when compared with non-cases (P = 0.021). Significant differences in haplotypes distribution were not observed in African-Americans (P = 0.315). Genetic variation in EPHX2 was significantly associated with risk of incident CHD in Caucasians, implicating EPHX2 as a potential cardiovascular disease-susceptibility gene.


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