title: One-quarter standard-dose ticagrelor better than standard-dose clopidogrel in Chinese patients with stable coronary artery disease: A randomized, single-blind, crossover clinical study.
abstract: Ticagrelor has been demonstrated to provide a more rapid and powerful inhibition of platelet aggregation compared with clopidogrel in coronary artery disease (CAD) patients. In our previous study, we found that half-dose ticagrelor produced similar inhibitory effects on platelet aggregation as standard-dose ticagrelor and exerted significantly stronger effects than clopidogrel in Chinese patients with non-ST-elevation ACS. Therefore, we performed this study to observe the efficacy of one-quarter standard-dose ticagrelor in comparison to standard-dose clopidogrel in Chinese patients with stable CAD.
  
  
  
  In a randomized, single-blind, crossover trial, 30 patients with stable CAD were randomized to one-quarter standard-dose ticagrelor (22.5mg BID for 7days) or standard-dose clopidogrel (75mg QD for 7days). Following a 2-week washout period, patients switched regimens. Light transmission aggregometry (LTA) and VerifyNow assay were used to measure platelet function.
  
  
  
  The platelet aggregation rate (PAgR) was obviously lower with ticagrelor than clopidogrel (17.70%±12.67% versus 27.63%±13.10%, P<0.05). The % inhibition levels in the ticagrelor group exhibited significantly greater than that in the clopidogrel group (65.33%±21.31% versus 36.23%±23.01%, P<0.01). PRU values in the ticagrelor group were dramatically lower than that in the clopidogrel group (87.03±51.38 versus 163.77±58.66, P<0.01). High-platelet reactivity (HPR) (≥208 PRU) was 0% with ticagrelor and 16.67% with clopidogrel.
  
  
  
  One-quarter standard-dose ticagrelor provided greater degree of platelet inhibition than standard-dose clopidogrel in Chinese patients with stable CAD.
authors.affiliation: Cardiovascular Department, the First Hospital of Harbin, PR China.
authors.forename: Meijiao
authors.initials: M
authors.lastname: He
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Danghui
authors.initials: D
authors.lastname: Sun
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Yujiao
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Cardiovascular Department, the First Hospital of Harbin, PR China.
authors.forename: Wanbin
authors.initials: W
authors.lastname: Zheng
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Shi
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Shiqi
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Xinwen
authors.initials: X
authors.lastname: Dong
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Lu
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Minghui
authors.initials: M
authors.lastname: Li
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Han
authors.affiliation: Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, PR China. Electronic address: ly99ly@vip.163.com.
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
mesh_terms: D000241:Adenosine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D000368:Aged; D002681:China; D000077144:Clopidogrel; D003324:Coronary Artery Disease / Q000188:drug therapy*; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010974:Platelet Aggregation / Q000187:drug effects; D016037:Single-Blind Method; D000077486:Ticagrelor; D013988:Ticlopidine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D016896:Treatment Outcome
chemical_list: D000077144:Clopidogrel; D000077486:Ticagrelor; D000241:Adenosine; D013988:Ticlopidine
keywords: Clopidogrel; Coronary artery disease; Platelet function tests; Ticagrelor