title: Association between Common Genetic Variants of α2A-, α2B-, and α2C-Adrenergic Receptors and Orthostatic Hypotension.
abstract: BACKGROUND
  The genetic background associated with the dysregulation of orthostatic blood pressure remains poorly understood. The sympathetic nervous system plays a pivotal role in the regulation of blood pressure, as well as in response to positional changes. The essential role of adrenergic receptors in the sympathetic nervous system prompted us to hypothesize that common genetic variants of the α2-adrenergic receptor might contribute to the dysregulation of orthostatic blood pressure in general populations. This study is to explore the association between the polymorphisms of the α2-adrenergic receptor genes and the occurrence of orthostatic hypotension in Chinese populations.
  
  
  METHODS
  The polymorphisms ADRA2A C-1291G (rs1800544), ADRA2B 301-303 I/D (rs28365031), and ADRA2C 322-325 I/D (rs61767072) were genotyped in 317 patients with orthostatic hypotension and 664 age- and gender-matched controls. Logistic regression analyses, adjusted for multiple comparisons, were used to determine the association between the allele/genotype of each ADRA2 gene and the risk of orthostatic hypotension.
  
  
  RESULTS
  No significant association was found between the ADRA2A C-1291G, ADRA2B 301-303 I/D, and ADRA2C 322-325 I/D polymorphisms and orthostatic hypotension.
  
  
  CONCLUSIONS
  We concluded that the common polymorphisms in the alpha2-adrenergic receptor gene is not associated with orthostatic hypotension risk in Chinese.
authors.forename: Na
authors.initials: N
authors.lastname: Lu
authors.forename: Ye
authors.initials: Y
authors.lastname: Yuan
authors.forename: Jinhua
authors.initials: J
authors.lastname: Piao
authors.forename: Fei
authors.initials: F
authors.lastname: Pei
authors.forename: Kai
authors.initials: K
authors.lastname: Sun
authors.forename: Yang
authors.initials: Y
authors.lastname: Zheng
authors.forename: Ru-Tai
authors.initials: RT
authors.lastname: Hui
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D001794:Blood Pressure / Q000235:genetics*; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D007024:Hypotension, Orthostatic / Q000175:diagnosis / Q000208:ethnology / Q000235:genetics* / Q000503:physiopathology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D010641:Phenotype; D011110:Polymorphism, Genetic; D018341:Receptors, Adrenergic, alpha-2 / Q000235:genetics*; D012307:Risk Factors
chemical_list: C547768:ADRA2A protein, human; C547771:ADRA2B protein, human; C547774:ADRA2C protein, human; D018341:Receptors, Adrenergic, alpha-2