title: Haplotype analysis of the beta2 adrenergic receptor gene and risk of myocardial infarction in humans.
abstract: Polymorphisms in the beta2 adrenergic receptor (ADRB2), in particular G16R, Q27E, and T164I, have been implicated in the pathogenesis of cardiovascular and metabolic phenotypes. However, no prospective, genetic-epidemiological data are available on the risk of cardiovascular disease associated with these variants. Using DNA samples collected at baseline in a prospective cohort of 14,916 initially healthy American men, we evaluated the G16R, Q27E, and T164I polymorphisms among 523 individuals who subsequently developed myocardial infarction and among 2092 individuals who remained free of reported cardiovascular events during follow-up. The haplotype frequency distribution was significantly different among cases and controls (chi(2)(7d.f.) = 20.92, P = 0.0039). Haplotype-based logistic regression, adjusting for age, smoking, and randomized treatment group, indicated that G16-Q27-I164 (odds ratio 0.178, 95% C.I. 0.043-0.737, P = 0.017) and (non-G16-Q27)-T164 (odds ratio 1.235, 95% C.I. 1.031-1.480, P = 0.022) haplotypes were significantly associated with altered risk of myocardial infarction. These findings remained after further adjustment for BMI, history of hypertension, and presence or absence of diabetes. In conclusion, variation in haplotype frequencies for the beta2 adrenergic receptor gene was found to be associated with risk of myocardial infarction.
authors.affiliation: Center for Cardiovascular Disease Prevention, LeDucq Center for Molecular and Genetic Epidemiology, Harvard Medical School, Boston, Massachusetts 02215, USA. rzee@rics.bwh.harvard.edu
authors.forename: Robert Y L
authors.initials: RY
authors.lastname: Zee
authors.forename: Nancy R
authors.initials: NR
authors.lastname: Cook
authors.forename: Rebecca
authors.initials: R
authors.lastname: Reynolds
authors.forename: Suzanne
authors.initials: S
authors.lastname: Cheng
authors.forename: Paul M
authors.initials: PM
authors.lastname: Ridker
mesh_terms: D015331:Cohort Studies; D005787:Gene Frequency; D014644:Genetic Variation; D006239:Haplotypes; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D009203:Myocardial Infarction / Q000453:epidemiology / Q000235:genetics*; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D018343:Receptors, Adrenergic, beta-2 / Q000235:genetics*; D012307:Risk Factors; D014481:United States / Q000453:epidemiology
chemical_list: D018343:Receptors, Adrenergic, beta-2