- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00914368
Tailoring Of Platelet Inhibition to Avoid Stent Thrombosis (TOPAS-1)
TOPAS-1, A Pharmacodynamic Phase II Study of Clopidogrel P2Y12 Platelet Inhibition
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Anticipated)
Phase
- Phase 2
Contacts and Locations
Study Locations
-
-
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Uppsala, Sweden, 75185
- Uppsala Clinical Research Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Provide signed written informed consent.
- Male or female patients above 18 years old.
- Previous PCI and coronary stenting for coronary artery disease
- Previous (after coronary stenting) or current dual antiplatelet treatment (aspirin 75 mg once daily (o.d) and clopidogrel 75 mg o.d). All patients need to be on treatment with aspirin 75 mg once daily at least seven days prior to enrollment.
Experienced one of the following alternatives:
- Stent thrombosis within 6 months of PCI while on dual antiplatelet treatment; OR
- Experienced MI within 6 month after coronary stenting while on dual antiplatelet treatment; OR
- No experience of stent thrombosis or MI for at least 6 months and until visit 1 (matched control)
Exclusion Criteria:
General exclusion criteria:
- Women who are known to be pregnant, who have given birth within the past 90 days, or who are breastfeeding.
- Any condition or laboratory findings which in the opinion of the Investigator makes the patient unsuitable for inclusion
- Enrolled in either another investigational drug study or in another investigational study of an approved drug within 30 days prior to Visit 1 of the current study.
- Known allergies or intolerance to aspirin and/or thienopyridines (clopidogrel or ticlopidine).
- Significant active neuropsychiatric disease, alcohol abuse or drug abuse, in the investigator's opinion.
UCR or Accumetrics employees or investigator site personnel directly affiliated with this study, and their immediate families. Immediate family is defined as a spouse, parent, child or sibling, whether biological or legally adopted.
Cardiovascular Exclusion Criteria:
- Subjects with unstable coronary artery disease, defined as new, increased, or rest angina at screening.
Subjects with significant hypertension (systolic blood pressure > 180 mm Hg or diastolic blood pressure >110 mmHg) at the time of screening.
Bleeding Risk Exclusion Criteria:
- Any known contraindication to treatment with an anticoagulant or antiplatelet agent.
- Prior history or presence of significant bleeding disorders (for example,hematemesis, melena, severe or recurrent epistaxis, hemoptysis, hematuria, or intraocular bleeding)
- Prior history or clinical suspicion of cerebral vascular malformations
- Prior history of abnormal bleeding tendency (i.e. prolonged bleeding on dental extraction, tonsillectomy, or previous surgical procedure).
- Personal or family history of coagulation or bleeding disorders.
- Thrombocytopenia (platelet count < 100,000/mm3) or thrombocytosis (platelet count > 500,000/mm3).
- History of major surgery, severe trauma, organ biopsy within 3 months prior to enrollment.
- Any planned surgical procedure within 20 days following inclusion.
- The use (or planned use) of other antiplatelet agents (besides aspirin and clopidogrel), anticoagulant or fibrinolytic agents.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Screening
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: 1
Patients with previously experienced stent thrombosis while on dual antiplatelet treatment within 6 months after coronary stenting for coronary artery disease
|
Patients not already on clopidogrel treatment a loading dose of clopidogrel 600 mg followed by a maintenance dose of 75 mg once daily will be administered.
Other Names:
|
Active Comparator: 2
Patients with previously experienced myocardial infarction while on dual antiplatelet treatment within 6 months after coronary stenting for coronary artery disease
|
Patients not already on clopidogrel treatment a loading dose of clopidogrel 600 mg followed by a maintenance dose of 75 mg once daily will be administered.
Other Names:
|
Active Comparator: 3
Patients without previously experienced myocardial infarction or stent thrombosis 6 within months after coronary stenting for coronary artery disease(matched controls for group 1 and 2)
|
Patients not already on clopidogrel treatment a loading dose of clopidogrel 600 mg followed by a maintenance dose of 75 mg once daily will be administered.
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
VerifyNow P2Y12 (PRU)
Time Frame: Within 6 months
|
Within 6 months
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
VASP (PRI, %)
Time Frame: Within 6 months
|
Within 6 months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Lars Wallentin, MD, PhD, Uppsala University, Uppsala Clinical Research Center
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
Keywords
Additional Relevant MeSH Terms
- Ischemia
- Pathologic Processes
- Necrosis
- Myocardial Ischemia
- Cardiovascular Diseases
- Vascular Diseases
- Arteriosclerosis
- Arterial Occlusive Diseases
- Embolism and Thrombosis
- Coronary Disease
- Myocardial Infarction
- Infarction
- Heart Diseases
- Coronary Artery Disease
- Thrombosis
- Acute Coronary Syndrome
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Platelet Aggregation Inhibitors
- Purinergic P2Y Receptor Antagonists
- Purinergic P2 Receptor Antagonists
- Purinergic Antagonists
- Purinergic Agents
- Clopidogrel
Other Study ID Numbers
- U-08-002
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.
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