title: Effects of clopidogrel on soluble CD40 ligand and on high-sensitivity C-reactive protein in patients with stable coronary artery disease.
abstract: BACKGROUND
  Antiplatelet therapy with clopidogrel decreases ischemic complication especially in patients with acute coronary syndromes or after percutaneous coronary interventions. Our study was designed to test the effects of clopidogrel on soluble CD40 ligand (sCD40l) and on high-sensitivity C-reactive protein (hs-CRP) in patients with stable coronary artery disease (CAD).
  
  
  METHODS
  This is a randomized, double-blind, placebo-controlled study. A total of 73 patients with stable CAD for > 6 months were randomized to receive either clopidogrel (loading dose 300 mg followed by 75 mg/d) for 8 weeks or placebo. Soluble CD40 ligand and hs-CRP were measured at baseline and at completion of the study.
  
  
  RESULTS
  All patients were on aspirin therapy, and 74% were on statins. Median and interquartile ranges (IQR) of sCD40l decreased from 64 pg/mL (43-99) at baseline to 53 pg/mL (35-77) at 8 weeks (P = .03) in the clopidogrel group and remained unchanged in the placebo group (59 pg/mL, IQR 35-77 vs 55 pg/mL, IQR 35-78) (P = non significant). Levels of hs-CRP were not affected by therapy and remained unchanged in both groups.
  
  
  CONCLUSIONS
  In patients with stable CAD, clopidogrel inhibits the release of sCD40l by platelets, which may contribute to the clinical benefit provided by this drug. This, however, does not translate in a reduction of subclinical inflammation, as measured by hs-CRP.
authors.affiliation: Division of Cardiology, The Hotel Dieu de France Hospital, The Saint-Joseph University School of Medicine, Beirut, Lebanon. razar@usj.edu.lb
authors.forename: Rabih R
authors.initials: RR
authors.lastname: Azar
authors.forename: Roland
authors.initials: R
authors.lastname: Kassab
authors.forename: Antoine
authors.initials: A
authors.lastname: Zoghbi
authors.forename: Simon
authors.initials: S
authors.lastname: Aboujaoudé
authors.forename: Hazem
authors.initials: H
authors.lastname: El-Osta
authors.forename: Pierre
authors.initials: P
authors.lastname: Ghorra
authors.forename: Mirna
authors.initials: M
authors.lastname: Germanos
authors.forename: Elie
authors.initials: E
authors.lastname: Salamé
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000032:analysis*; D023201:CD40 Ligand / Q000097:blood*; D000077144:Clopidogrel; D003324:Coronary Artery Disease / Q000097:blood / Q000188:drug therapy*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D013988:Ticlopidine / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D015415:Biomarkers; D010975:Platelet Aggregation Inhibitors; D023201:CD40 Ligand; D002097:C-Reactive Protein; D000077144:Clopidogrel; D013988:Ticlopidine