- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02711410
The Influence of CYP2C19 Polymorphism and Clinical Outcomes in Stroke Patients
The Influence of CYP2C19 Polymorphism on Antiplatelet Effects and Clinical Outcomes in Non-acute Stroke Patients Treated With Clopidogrel: The Contribution of Genetic Analysis to the Efficacy of Clopidogrel (Cognac) Study
Background:
Clopidogrel, an antiplatelet prodrug, is widely used for prevention of the recurrent cardiovascular events. CYP2C19 is one of the crucial enzymes for the activation of clopidogrel. Recent studies, mostly done in cardiovascular patients, showed association of the CYP2C19 genotypes with recurrent cardiovascular events. However, prospective data on the impact of the genetic variants in stroke patients are limited.
Methods:
Five hundred and eighteen Japanese non-acute stroke patients treated with clopidogrel were registered at 14 institutions. Three CYP2C19 variants (CYP2C19*2, *3, *17) were genotyped and the patients were classified into three clopidogrel metabolizer groups inferred from the CYP2C19 genotypes: extensive (EM: *1/*1), intermediate (IM: *1/*2 or *1/*3), and poor (PM: *2/*2, *2/*3, or *3/*3). The CYP2C19*17 carriers were excluded from the analysis. The antiplatelet effects of clopidogrel were assessed by Adenosine diphosphate (ADP) -induced platelet aggregation and vasodilator-stimulated phosphoprotein (VASP) phosphorylation, expressed as VASP index. The endpoint was the composite incidence of stroke, transient ischemic attack, myocardial infarction, revascularization, other thromboembolic disease, or cardiovascular death during 2 years of follow-up.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Actual)
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Patients who had received long-term clopidogrel therapy (once a day for at least one month) with a minimum one-month interval between enrollment and the last cerebral ischemic or TIA event.
- Males and females aged 20 years or older who were prescribed clopidogrel for the secondary prevention of cerebral infarction or transient ischemic attack and who were willing and able to give written informed consent.
Exclusion Criteria:
- Malignancies
- Congenital bleeding tendency
- Atrial fibrillation
- Concomitant use of an oral anticoagulant agent
- a platelet count of < 100 x 109/L or > 450 x 109/L within 3 months of enrollment
- Modified rankin scale > 4
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The primary outcome of the study was recurrent cardiovascular event (CVEs), including ischemic stroke, transient ischemic attack (TIA), acute myocardial infarction, urgent revascularization, other thromboembolic disease, and cardiovascular death.
Time Frame: Two Years
|
Ischemic stroke was defined as a new neurologic deficit of cardiovascular origin lasting at least > 24 hours based on radiological evidence of stroke.
TIA was defined as a transient episode of neurologic dysfunction caused by focal brain ischemia and improving within 24 hours.
Urgent revascularization was defined as emergent revascularization for unexpected hospitalization.
Acute myocardial infarction was defined as myocardial cell necrosis in the setting of ischemic symptoms and electrocardiogram changes (ST segment elevation or depression, development of Q waves) and/or rising specific cardiac biomarkers.
Cardiovascular death was defined as death due to stroke, myocardial infarction or documented sudden cardiac death.
|
Two Years
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Secondary outcome was major bleeding (intracranial haemorrhage, documented retroperitoneal bleed, and any red blood cell transfusion rates or proportion with bleeding associated with a ≧2g/dl hemoglobin drop).
Time Frame: two years
|
Intracranial haemorrhage retroperitoneal bleed were defined on radiological evidence.
Proportion with bleeding associated with a ≧2g/dl hemoglobin drop was assessed by Blood laboratory test.
|
two years
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- NationalCardioCenterCognac
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Platelet Aggregation Inhibitors
-
Ospedale Santa Croce-Carle CuneoUnknownPlatelet Aggregation Inhibitors
-
Duke UniversityCompletedAspirin | Platelet Aggregation Inhibitors | Ticagrelor | RNAUnited States
-
The First Affiliated Hospital of Dalian Medical...CompletedPercutaneous Coronary Intervention | Aged | Platelet Aggregation Inhibitors | Dual Anti-Platelet TherapyChina
-
BloodworksUnited States Department of DefenseActive, not recruitingReversal of Platelet Aggregation InhibitorsUnited States
-
Samsung Medical CenterCompletedAdherence, Medication | Percutaneous Coronary Intervention | Compliance, Medication | Platelet Aggregation Inhibitors | Hydroxymethylglutaryl-coa Reductase Inhibitors | Persistence, MedicationKorea, Republic of
-
University of PadovaUniversity Hospital PadovaRecruitingCraniocerebral Trauma | Platelet Aggregation InhibitorsItaly
-
Maastricht University Medical CenterUnknownHematologic Neoplasms | Thrombocytopenia | Anticoagulants | Platelet Aggregation InhibitorsNetherlands, Italy, Israel, United States
-
Montreal Heart InstituteInstitut de Recherches Cliniques de MontrealRecruitingDiabetes Mellitus, Type 2 | Type 2 Diabetes | Platelet Aggregation | Aspirin | Platelet Aggregation InhibitorsCanada
-
Inova Health Care ServicesCompletedPlatelet Aggregation InhibitorsUnited States
-
R&D CardiologieCompletedAtrial Fibrillation | Stents | Anticoagulants | Platelet Aggregation InhibitorsNetherlands, Belgium
Clinical Trials on Clopidogrel
-
Korea University Anam HospitalCompleted
-
Chinese PLA General HospitalUnknownCLOPIDOGREL, POOR METABOLISM of (Disorder)China
-
Ospedale San DonatoCompletedAcute Myocardial InfarctionItaly
-
University of PecsTerminatedStable Angina Pectoris | Ad Hoc Percutaneous Coronary InterventionHungary
-
Hospital Central San Luis Potosi, MexicoUnknownAcute Coronary Syndrome
-
University of North Carolina, Chapel HillCompleted
-
Lady Reading Hospital, PakistanPakistan Chest Society, PakistanRecruitingCOPD | COPD Exacerbation AcutePakistan
-
Deutsches Herzzentrum MuenchenTerminatedCoronary Artery DiseaseGermany
-
Seung-Jung ParkCardioVascular Research Foundation, KoreaCompleted
-
University of PecsHungarian Academy of Sciences; KRKACompletedCoronary Heart Disease | Percutaneous Coronary Intervention