- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning 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).
Studieöversikt
Status
Betingelser
Intervention / Behandling
Detaljerad beskrivning
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.
Studietyp
Inskrivning (Faktisk)
Fas
- Fas 4
Kontakter och platser
Studieorter
-
-
Utrecht
-
Nieuwegein, Utrecht, Nederländerna, 3435CM
- St Antonius hospital
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
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
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Diagnostisk
- Tilldelning: Icke-randomiserad
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Aktiv komparator: stent thrombosis patients
Patients with a history of a stent thrombosis
|
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
Andra namn:
|
|
Aktiv komparator: Patients without a history of a stent thrombosis
Patients without a history of stent thrombosis
|
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
Andra namn:
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Tidsram |
|---|---|
|
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.
Tidsram: 6 hours after the administration of a 600mg loading dose of clopidogrel
|
6 hours after the administration of a 600mg loading dose of clopidogrel
|
Sekundära resultatmått
Resultatmått |
Tidsram |
|---|---|
|
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.
Tidsram: platelet reactivity measured at baseline and 6 hours after a 600 mg clopidogrel loading dose.
|
platelet reactivity measured at baseline and 6 hours after a 600 mg clopidogrel loading dose.
|
|
Exploratory Endpoint: prevalence of various genetic polymorphisms that might influence the pharmacokinetics of clopidogrel
Tidsram: blood obtained for genetic sampeling at timepoint of first study blood collection
|
blood obtained for genetic sampeling at timepoint of first study blood collection
|
Samarbetspartners och utredare
Sponsor
Samarbetspartners
Utredare
- Huvudutredare: J.M. ten Berg, MD, PhD, St Antonius center for platelet function research
Publikationer och användbara länkar
Allmänna publikationer
- 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.
Studieavstämningsdatum
Studera stora datum
Studiestart
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Uppskatta)
Uppdateringar av studier
Senaste uppdatering publicerad (Uppskatta)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
- Hjärt-kärlsjukdomar
- Kärlsjukdomar
- Embolism och trombos
- Trombos
- Läkemedels fysiologiska effekter
- Neurotransmittormedel
- Molekylära mekanismer för farmakologisk verkan
- Trombocytaggregationshämmare
- Purinerga P2Y-receptorantagonister
- Purinerga P2-receptorantagonister
- Purinerga antagonister
- Purinerga medel
- Clopidogrel
Andra studie-ID-nummer
- MAPCAT01
Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .