Clinical trial NCT01212302: Optimizing Aspirin and Clopidogrel Therapy (BOchum CLopidogrel and Aspirin Plan)
Official title: Optimizing Therapy With Aspirin and Clopidogrel. The BOchum CLopidogrel and Aspirin Plan to Improve Dual Antiplatelet Therapy.
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Coronary Artery Disease
Keywords: Clopidogrel
ASA
Low Response
Resistance
Lead sponsor: Ruhr University of Bochum
Sponsor class: OTHER
First posted: 2010-09-30
Enrollment: 500
Sex: ALL
Minimum age (years): 18
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: Dual antiplatelet therapy with acetylsalicylic acid (ASA, aspirin) and clopidogrel is of great importance for treatment following coronary stenting. Unfortunately the variable platelet inhibitory effectiveness compromises the antithrombotic benefit of dual antiplatelet therapy. The aim of this prospective single centre study was to reduce the low response incidence of dual antiplatelet therapy with ASA and clopidogrel based on a standardized therapy algorithm.

Detailed description: Platelet function testing using whole blood aggregometry was performed 48 hours following coronary stenting (either acute coronary syndromes or stable coronary artery disease). The antiplatelet therapy included a loading dose of 600 mg clopidogrel and 500 mg ASA, followed by 75 mg clopidogrel and 100 mg ASA once daily. Clopidogrel low-response (CLR) and/or ASA (ASA low response) were treated according to a structured therapy plan.

Eligibility criteria: Inclusion Criteria:

* Patients with stable coronary artery disease (CAD) or acute coronary syndromes (ACS) following percutaneous coronary intervention (PCI)

Exclusion Criteria:

* abnormal platelet count in patients,
* severe liver disorders,
* current gastrointestinal disorders,
* current infections,
* congestive heart failure,
* known bleeding disorders,
* treatment with bivalirudin or glycoprotein IIb/IIIa antagonists within the last 7 days.

Primary outcomes:
measure: Number of Participants Who Were Responders or Low-Responders of Antiplatelet Therapy as a Result of Whole Blood Aggregometry Testing (See Outcome Measure Description)
timeFrame: 2 years
Secondary outcomes:
Other outcomes:
Locations:
city: Bochum
country: Germany
facility: Cardiovascular Center, Ruhr University Bochum, St. Josef - Hospital, Gudrunstrasse 56
state: NRW
Study officials:
affiliation: Ruhr-University Bochum, Cardiovascular Center
name: Horst Neubauer, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Geisler T, Gawaz M, Steinhubl SR, Bhatt DL, Storey RF, Flather M. Current strategies in antiplatelet therapy--does identification of risk and adjustment of therapy contribute to more effective, personalized medicine in cardiovascular disease? Pharmacol Ther. 2010 Aug;127(2):95-107. doi: 10.1016/j.pharmthera.2010.04.017. Epub 2010 Jun 1.
citation: Collet JP, Silvain J, Landivier A, Tanguy ML, Cayla G, Bellemain A, Vignolles N, Gallier S, Beygui F, Pena A, Montalescot G. Dose effect of clopidogrel reloading in patients already on 75-mg maintenance dose: the Reload with Clopidogrel Before Coronary Angioplasty in Subjects Treated Long Term with Dual Antiplatelet Therapy (RELOAD) study. Circulation. 2008 Sep 16;118(12):1225-33. doi: 10.1161/CIRCULATIONAHA.108.776757. Epub 2008 Sep 2.
citation: Bonello L, Armero S, Ait Mokhtar O, Mancini J, Aldebert P, Saut N, Bonello N, Barragan P, Arques S, Giacomoni MP, Bonello-Burignat C, Bartholomei MN, Dignat-George F, Camoin-Jau L, Paganelli F. Clopidogrel loading dose adjustment according to platelet reactivity monitoring in patients carrying the 2C19*2 loss of function polymorphism. J Am Coll Cardiol. 2010 Nov 9;56(20):1630-6. doi: 10.1016/j.jacc.2010.07.004. Epub 2010 Aug 12.
citation: Neubauer H, Lask S, Engelhardt A, Mugge A. How to optimise clopidogrel therapy? Reducing the low-response incidence by aggregometry-guided therapy modification. Thromb Haemost. 2008 Feb;99(2):357-62. doi: 10.1160/TH07-10-0624.
citation: Angiolillo DJ, Shoemaker SB, Desai B, Yuan H, Charlton RK, Bernardo E, Zenni MM, Guzman LA, Bass TA, Costa MA. Randomized comparison of a high clopidogrel maintenance dose in patients with diabetes mellitus and coronary artery disease: results of the Optimizing Antiplatelet Therapy in Diabetes Mellitus (OPTIMUS) study. Circulation. 2007 Feb 13;115(6):708-16. doi: 10.1161/CIRCULATIONAHA.106.667741. Epub 2007 Jan 29.
citation: Neubauer H, Kaiser AF, Endres HG, Kruger JC, Engelhardt A, Lask S, Pepinghege F, Kusber A, Mugge A. Tailored antiplatelet therapy can overcome clopidogrel and aspirin resistance--the BOchum CLopidogrel and Aspirin Plan (BOCLA-Plan) to improve antiplatelet therapy. BMC Med. 2011 Jan 12;9:3. doi: 10.1186/1741-7015-9-3.