title: Polymorphisms of the beta2 -adrenoceptor (ADRB2) gene and essential hypertension: the ECTIM and PEGASE studies.
abstract: OBJECTIVE
  The beta2-adrenoceptor (ADRB2) plays a pivotal role in signalling in relation to hypertension and obesity. Polymorphisms of the ADRB2 gene have been shown to be potentially related to essential hypertension and other non-cardiovascular disease phenotypes. We investigated whether genetic variation of the ADRB2 gene might be related to essential hypertension or myocardial infarction (MI).
  
  
  METHODS
  Four ADRB2 gene polymorphisms C19R (T-47C), T-20C, G16R (G+46A), Q27E (C+79G) were investigated in two studies: PEGASE, a study of moderate to severe hypertension (707 cases) conducted in France, and ECTIM, a case-control study of MI (1178 cases, 1187 controls) conducted in France, Northern Ireland and Scotland. Genotyping was performed using allele-specific oligonucleotides.
  
  
  RESULTS
  The ADRB2 polymorphisms T-20C and Q27E were found to be completely concordant, generating the haplotypes [T-20-Q27] and [C-20-E27]. Three main haplotypes accounted for 94% of all haplotypes: [R19-G16-E27] (39%), [C19-R16-Q27] (35%) and [C19-G16-Q27] (20%). Haplotype frequencies were not significantly different between countries. Allele and genotype frequencies did not differ significantly between cases with essential hypertension or MI and control subjects. There was no association of the polymorphisms with early onset hypertension, blood pressure level, coronary artery stenosis or any other phenotype measured in these study populations. In the ECTIM Study, our calculation revealed that we could have detected an odds ratio (OR) for MI of 1.3 with 80% power at a 5% type I error probability, the corresponding value for the PEGASE Study being an OR of 1.6 for hypertension.
  
  
  CONCLUSIONS
  From our present analysis we conclude that the ADRB2 gene polymorphisms studied do not contribute in any important way to the risk of essential hypertension or MI in subjects of European ancestry.
authors.affiliation: Institut National de la Santé et de la Recherche Médicale (Inserm) SC7/U525, Paris, France. hermann@medizin.fu-berlin.de
authors.forename: Stefan-Martin
authors.initials: SM
authors.lastname: Herrmann
authors.forename: Viviane
authors.initials: V
authors.lastname: Nicaud
authors.forename: Laurence
authors.initials: L
authors.lastname: Tiret
authors.forename: Alun
authors.initials: A
authors.lastname: Evans
authors.forename: Frank
authors.initials: F
authors.lastname: Kee
authors.forename: Jean-Bernard
authors.initials: JB
authors.lastname: Ruidavets
authors.forename: Dominique
authors.initials: D
authors.lastname: Arveiler
authors.forename: Gerald
authors.initials: G
authors.lastname: Luc
authors.forename: Caroline
authors.initials: C
authors.lastname: Morrison
authors.forename: Margret R
authors.initials: MR
authors.lastname: Hoehe
authors.forename: Martin
authors.initials: M
authors.lastname: Paul
authors.forename: François
authors.initials: F
authors.lastname: Cambien
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000483:Alleles; D015992:Body Mass Index; D016022:Case-Control Studies; D005260:Female; D005602:France / Q000453:epidemiology; D017353:Gene Deletion; D005787:Gene Frequency / Q000235:genetics; D005838:Genotype; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000235:genetics; D010641:Phenotype; D011110:Polymorphism, Genetic / Q000235:genetics*; D018343:Receptors, Adrenergic, beta-2 / Q000235:genetics*; D012737:Sex Factors; D006113:United Kingdom / Q000453:epidemiology; D014944:World Health Organization
chemical_list: D018343:Receptors, Adrenergic, beta-2