title: Association between genetic polymorphisms in the renin-angiotensin system and systolic heart failure revised by a propensity score-based analysis.
abstract: OBJECTIVE
  The objective of this study is to identify possible genetic polymorphisms of the renin-angiotensin system (RAS) in systolic heart failure (sHF).
  
  
  METHODS
  A total of 509 patients were enrolled into this study. A non-parsimonious multivariable logistic regression model that incorporated potential risk factors was applied to calculate the propensity score for developing sHF. A 1:1 case-control selection process was made according to the rank of propensity. The six genetic polymorphisms of angiotensinogen (AGT), including T174M, M235T, G-6A, A-20C, G-152A, and G-217A, and angiotensin-converting enzyme (ACE) gene I/D polymorphism were typed by polymerase chain reaction and DNA sequencing technique.
  
  
  RESULTS
  The CC genotype at T174M was positively associated with sHF (OR 2.81, 95% CI 1.20-6.61, p = 0.018). The GG genotype at G-152A was also positively associated with the presence of sHF (OR 6.25, 95% CI 1.54-25.4, p = 0.010). OR of the ACE DD genotype for sHF, as compared with ACE II genotype, was 1.37 (p = 0.475), and OR for ID genotype compared with II genotype was 5.95 for sHF (95% CI 2.16-16.4, p = 0.001).
  
  
  CONCLUSIONS
  The exploration of these RAS genes related to sHF may provide a more targeted and tailored treatment of sHF.
authors.affiliation: Cardiovascular Center, National Taiwan University Hospital Yun-Lin Branch, Dou-Liou City, Taiwan, ROC.
authors.forename: Sheng-Nan
authors.initials: SN
authors.lastname: Chang
authors.forename: Jou-Wie
authors.initials: JW
authors.lastname: Lin
authors.forename: Jyh-Ming
authors.initials: JM
authors.lastname: Juang
authors.forename: Chai-Ti
authors.initials: CT
authors.lastname: Tsai
authors.forename: Juey-Jen
authors.initials: JJ
authors.lastname: Hwang
authors.forename: Fu-Tien
authors.initials: FT
authors.lastname: Chiang
mesh_terms: D016022:Case-Control Studies; D016009:Chi-Square Distribution; D017023:Coronary Angiography; D004452:Echocardiography; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D054143:Heart Failure, Systolic / Q000000981:diagnostic imaging / Q000235:genetics*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D057216:Propensity Score; D012084:Renin-Angiotensin System / Q000235:genetics*; D012307:Risk Factors