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- Klinische proef NCT01012544
Platelet Reactivity in Stent Thrombosis Patients (MAPCAT)
The MAgnitude of Platelet Inhibition and the Pharmacokinetics of a 600 mg Loading Dose of Clopidogrel, in Different Patient CATegories (Stable Angina Versus Acute-coronary Syndromes Versus ST-elevated Myocardial Infarction).
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
Objectives:
The first objective of the MAPCAT-study is to investigate whether plasma pharmacokinetics (Cmax, Tmax and AUC) of an additional 600 mg loading dose are impaired in patients with a history of stent thrombosis.
The second objective of the MAPCAT study is to investigate whether genetic polymorphisms in receptors, enzymes and ligands involved in the process of thrombosis and haemostasis as well in the conversion-process of clopidogrel into its metabolites do have influence on both the absolute magnitude of platelet inhibition and Cmax, Tmax and AUC.
Studietype
Inschrijving (Werkelijk)
Fase
- Fase 4
Contacten en locaties
Studie Locaties
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Utrecht
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Nieuwegein, Utrecht, Nederland, 3435CM
- St Antonius hospital
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
- Patients with a history of a stent thrombosis in the period 2004-2008.
Exclusion Criteria:
- Persistent acute ST-segment elevation
- Successful revascularization during the qualifying hospitalization, prior to study entry
- Acute pulmonary edema, hypotension, or evidence of cardiogenic shock
- Clinically significant liver disease
- End stage kidney disease requiring dialysis
- Use at study entry of drugs that are strong inhibitors of cytochrome P450 3A4 and CYP3A5 (i.e. clarithromycin, erythromycin, itraconazole, ketoconazole)
- Contraindications to antithrombotic/antiplatelet therapy
- Failed coronary intervention in the previous 2 weeks
- Malignancies
- Increased risk of bleeding (previous stroke in the past months, active bleeding or bleeding diathesis, recent trauma or major surgery in the last month, suspected aortic dissection, oral anticoagulation therapy with coumarin derivate within 7 days, recent use of GPIIb/IIIa inhibitors within 14 days, severe uncontrolled hypertension >180 mmHg unresponsive to therapy)
- Relevant hematologic deviations (haemoglobin <100g/L (6,2 mmol/L) or hematocrit <34%, platelet count <100 x 109 /L or platelet count > 600 x 109/L)
- Known allergy to clopidogrel
- Pregnancy (present or suspected)
- uncontrolled hypertension at time of randomization
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Diagnostisch
- Toewijzing: Niet-gerandomiseerd
- Interventioneel model: Opdracht voor een enkele groep
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Actieve vergelijker: stent thrombosis patients
Patients with a history of a stent thrombosis
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both arms of the study (patients with a history of stent thrombosis as well as patients who did not suffer from a stent thrombosis) will be given a 600 mg loading dose of clopidogrel
Andere namen:
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Actieve vergelijker: Patients without a history of a stent thrombosis
Patients without a history of stent thrombosis
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both arms of the study (patients with a history of stent thrombosis as well as patients who did not suffer from a stent thrombosis) will be given a 600 mg loading dose of clopidogrel
Andere namen:
|
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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Plasma concentrations of unchanged clopidogrel, its active thiol metabolite and its inactive carboxyl metabolite between the different patient groups after the administration of a 600 mg loading dose of clopidogrel.
Tijdsspanne: 6 hours after the administration of a 600mg loading dose of clopidogrel
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6 hours after the administration of a 600mg loading dose of clopidogrel
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Secundaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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The magnitude of platelet reactivity as measured with several commercial available platelet function tests before and 6 hours after the ingestion of the loading dose.
Tijdsspanne: platelet reactivity measured at baseline and 6 hours after a 600 mg clopidogrel loading dose.
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platelet reactivity measured at baseline and 6 hours after a 600 mg clopidogrel loading dose.
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Exploratory Endpoint: prevalence of various genetic polymorphisms that might influence the pharmacokinetics of clopidogrel
Tijdsspanne: blood obtained for genetic sampeling at timepoint of first study blood collection
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blood obtained for genetic sampeling at timepoint of first study blood collection
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Medewerkers en onderzoekers
Sponsor
Medewerkers
Onderzoekers
- Hoofdonderzoeker: J.M. ten Berg, MD, PhD, St Antonius center for platelet function research
Publicaties en nuttige links
Algemene publicaties
- van Werkum JW, Heestermans AA, Zomer AC, Kelder JC, Suttorp MJ, Rensing BJ, Koolen JJ, Brueren BR, Dambrink JH, Hautvast RW, Verheugt FW, ten Berg JM. Predictors of coronary stent thrombosis: the Dutch Stent Thrombosis Registry. J Am Coll Cardiol. 2009 Apr 21;53(16):1399-409. doi: 10.1016/j.jacc.2008.12.055.
- Elsenberg EH, van Werkum JW, van de Wal RM, Zomer AC, Bouman HJ, Verheugt FW, Berg JM, Hackeng CM. The influence of clinical characteristics, laboratory and inflammatory markers on 'high on-treatment platelet reactivity' as measured with different platelet function tests. Thromb Haemost. 2009 Oct;102(4):719-27. doi: 10.1160/TH09-05-0285.
- Taubert D, Bouman HJ, van Werkum JW. Cytochrome P-450 polymorphisms and response to clopidogrel. N Engl J Med. 2009 May 21;360(21):2249-50; author reply 2251. doi: 10.1056/NEJMc090391. No abstract available.
- Heestermans AA, van Werkum JW, Schomig E, ten Berg JM, Taubert D. Clopidogrel resistance caused by a failure to metabolize clopidogrel into its metabolites. J Thromb Haemost. 2006 May;4(5):1143-5. doi: 10.1111/j.1538-7836.2006.01891.x. No abstract available.
- Taubert D, von Beckerath N, Grimberg G, Lazar A, Jung N, Goeser T, Kastrati A, Schomig A, Schomig E. Impact of P-glycoprotein on clopidogrel absorption. Clin Pharmacol Ther. 2006 Nov;80(5):486-501. doi: 10.1016/j.clpt.2006.07.007.
- Bouman HJ, van Werkum JW, Breet NJ, ten Cate H, Hackeng CM, ten Berg JM. A case-control study on platelet reactivity in patients with coronary stent thrombosis. J Thromb Haemost. 2011 May;9(5):909-16. doi: 10.1111/j.1538-7836.2011.04255.x.
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Schatting)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
- Hart-en vaatziekten
- Vaatziekten
- Embolie en trombose
- Trombose
- Fysiologische effecten van medicijnen
- Neurotransmitter agenten
- Moleculaire mechanismen van farmacologische werking
- Bloedplaatjesaggregatieremmers
- Purinerge P2Y-receptorantagonisten
- Purinerge P2-receptorantagonisten
- Purinerge antagonisten
- Purinerge middelen
- Clopidogrel
Andere studie-ID-nummers
- MAPCAT01
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