title: Perindopril treatment promote left ventricle remodeling in patients with heart failure screened positive for autoantibodies against angiotensin II type 1 receptor.
abstract: BACKGROUND
  Autoantibodies specific to the angiotensin II type I receptor (anti-AT1-AR) have been implicated in the pathology of congestive heart failure (CHF). Anti-AT1-AR may be associated with left ventricular function in CHF patients treated with perindopril.
  
  
  METHODS
  Synthetic angiotensin II type 1 receptor (AT1-R) peptides served as the target antigen. ELISA was used to screen the sera of 156 CHF patients, which were divided into positive and negative groups based on their anti-AT1-AR reactivity. Echocardiography and a 6-minute walk test were performed at baseline and after one year of perindopril therapy. The end-point events were compared over a 5-year follow-up.
  
  
  RESULTS
  Final analysis covered 138 patients, including 82 positive and 56 negative. The frequency and geometric mean titre of anti-AT1-AR were significantly lower in the positive group after one year of treatment (all P < 0.01, from 100% to 73.2% and from 1:125.3 ± 1.0 to 1:69.2 ± 1.1). Of these, 22 patients showed no antibodies. Both groups showed improvement in left ventricular end-diastole, end-systolic dimensions, ejection fraction, and a 6-minute walk test by perindopril in combination with standard treatment regime for one year (all P < 0.01). However, the 82 patients positive for anti-AT1-AR showed more pronounced improvement than the 56 negative patients (all P < 0.05). However, after 5 years of follow-up, the rate of all causes and cardiovascular mortality attributable to any cause and the re-hospitalisation rate showed no significant differences between the two groups (all P > 0.05).
  
  
  CONCLUSIONS
  Perindopril treatment significantly decreased the frequency and geometric mean titre in patients positive for anti-AT1-AR, even to complete ablation. These patients showed greater improvement in left ventricular remodeling and heart function than negative that in patients after one year of perindopril treatment in combination with standard treatment, but no significant differences in endpoint events were observed in the following 5 years. Anti-AT1-AR might be a useful biomarker of over-activation of the renin-angiotensin-aldosterone system for clinical medication.
authors.forename: Qian
authors.initials: Q
authors.lastname: Du
authors.forename: Jinling
authors.initials: J
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Jiamei
authors.initials: J
authors.lastname: Liu
authors.forename: Juan
authors.initials: J
authors.lastname: Zhang
authors.forename: Jin
authors.initials: J
authors.lastname: Chen
authors.forename: Hakon
authors.initials: H
authors.lastname: Hakonarson
authors.forename: Aihua
authors.initials: A
authors.lastname: Hu
authors.affiliation: Heart Failure Center, Departments of Cardiology, Capital Medical University, Chao-Yang Hospital, Beijing, China. linzhangpeking@126.com.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000368:Aged; D000595:Amino Acid Sequence; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000494:pharmacology / Q000627:therapeutic use; D001323:Autoantibodies / Q000097:blood*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000097:blood* / Q000188:drug therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D020913:Perindopril / Q000494:pharmacology / Q000627:therapeutic use*; D011446:Prospective Studies; D044140:Receptor, Angiotensin, Type 1 / Q000097:blood*; D016896:Treatment Outcome; D016277:Ventricular Function, Left / Q000187:drug effects / Q000502:physiology*; D020257:Ventricular Remodeling / Q000187:drug effects / Q000502:physiology*
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D001323:Autoantibodies; D044140:Receptor, Angiotensin, Type 1; D020913:Perindopril