Statin therapy is associated with reduced restenosis rates after coronary stent implantation in carriers of the PIA2 allele of the platelet glycoprotein IIIa gene

Aims platelets play a central role in the restenosis process by inducing neointimal proliferation after coronary interventions. Glycoprotein IIb/IIIa Pl(A2) polymorphism has been associated with the occurrence of acute coronary syndromes and increased restenosis rates. Statins have been shown to exert potent antiproliferative, antiinflammatory and antithrombotic properties, thereby potentially interfering with the major processes of in-stent restenosis. Therefore, we sought to find out whether statin therapy interferes with restenosis and clinical outcome at 6 months following successful coronary stent implantation in the presence or absence of the Pl(A2) allele. Methods and Results Six hundred and fifty consecutive patients were followed for 6 months after corollary stent insertion. Carriers of the Pl(A2) allele demonstrated a significantly increased restenosis rate, which was abrogated by statin therapy (50.9% vs 28.6%, P=0.01). Moreover, statin therapy was associated with a significant reduction (28.2% vs 49.3%, P<0.01) in the occurrence of major adverse coronary events (myocardial infarction, cardiac death, target vessel revascularization) in the 6 months after the intervention in patients with the Pl(A2) allele. Conclusion Statin therapy reduces increased stent restenosis rates and improves clinical outcome following coronary stent implantation in patients bearing the Pl(A2) allele, suggesting that statins interfere with the functional consequence of a genetically determined platelet-mediated risk factor associated with Pl(A2) polymorphism. (Eur Heart J 2001: 22: 587-595). (C) 2001 The European Society of Cardiology.