- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00728156
Platelet-dependent Thrombosis: a Placebo-controlled Trial of Antiplatelet Therapy (Clopidogrel)
October 7, 2015 updated by: Newcastle-upon-Tyne Hospitals NHS Trust
Assessment of Platelet-dependent Thrombosis by an ex Vivo Arterial Injury Model: a Placebo Controlled Trial of Clopidogrel as Antiplatelet Therapy in Patients With Type 2 Diabetes Mellitus and Coronary Artery Disease
Patients with diabetes are more likely to develop furring of their coronary arteries and present with angina and heart attacks.
Furthermore, after such an event, they have poorer outcomes (higher rates of death) and survivors are more likely to have recurring symptoms.
Using a novel "clotting chamber" the investigators have shown that patients with diabetes are more likely to develop blood clots.
This study will look at the role of different blood thinning medications in patients with diabetes.
If successful, the investigators will provide evidence to conduct large clinical studies to look at the role of additional blood thinning medication in reducing heart attacks and strokes in patients with diabetes.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
The objective of this study is to compare the effect of Clopidogrel on platelet dependent thrombosis in patients with T2DM and CAD with placebo.
The Badimon chamber, an ex vivo arterial injury model is used for this purpose.
This model simulates the in vivo situation of high shear arterial wall damage and helps to quantify thrombus which is the sum endpoint of all haemostatic abnormalities seen in vitro.
Study Type
Interventional
Enrollment (Actual)
90
Phase
- Phase 4
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Tyne and Wear
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Newcastle upon Tyne, Tyne and Wear, United Kingdom, NE4 6BE
- Newcastle Diabetes Centre, Newcastle General Hospital
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Newcastle upon Tyne, Tyne and Wear, United Kingdom, NE77DN
- Freeman Hospital
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 75 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
Patients with T2DM and CAS as defined below:
- Clinical definitions
- T2DM: Diagnosed according to the WHO criteria [53].
- CAD:Presence of any one of the following: Angina plus positive exercise tolerance test, enzyme and/or Q wave positive myocardial infarction, angiographic evidence ( >50% stenosis of one vessel), percutaneous or surgical coronary revascularisation.
- Aged between 18 and 75
- Provided written consent for participation in the trial prior to any study-specific procedures or requirements.
Exclusion Criteria:
- Contraindication to Clopidogrel
- Smoking (current smokers and patients who quit smoking less than six months)
- Malignancy(diagnosed or under investigation)
- Haematological disorders (Anaemia, malignancy, bleeding disorders)
- Women of child-bearing potential
- Use of corticosteroids/other antithrombotic agents(warfarin)
- Chronic liver disease (Cirrhosis, malignancy and patients with more than twice the upper limit of liver function tests)
- Unable to consent.
- Use of other investigational study drugs within 1 year prior to study entry
- Previous participation in this study
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: C
Patients assigned to clopidogrel in addition to their standard care.(all
patients will be on aspirin)We aim to study the effect of clopidogrel as dual antiplatelet therapy in patients with established coronary artery disease and type 2 diabetes.
Ninety patients with type 2 diabetes and stable coronary artery disease has been randomly treated with clopidogrel or placebo (45 each) for one week in addition to their standard care (including aspirin,75 mg once daily).
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75 milligrams, oral, clopidogrel, one tablet daily, for seven days after the baseline chamber study.
Other Names:
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Placebo Comparator: P
Patients assigned to placebo in addition to their standard care.(all
patients will be on aspirin).This is a single-centre randomised double-blind placebo-controlled parallel design study, comparing efficacy of clopidogrel versus placebo in patients with T2DM and coronary artery disease.
Ninety patients have completed the study.
All patients were on their routine medications as per standard practice.
After informed consent, participants were randomised to receive either clopidogrel 75mg daily or placebo for 7 days.
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Placebo: Hydroxy methyl cellulose, similar in weight to the active medication 75 mgs, oral tablets, once a day
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
To compare the effect of Clopidogrel in reduction of thrombogenicity in patients with T2DM and CAD with placebo
Time Frame: seven days
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seven days
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Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
To identify patients (in particular T2DM patients with CAD) resistant to oral antiplatelet therapy
Time Frame: seven days
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seven days
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To characterise features in T2DM patients responsible for increased thrombogenicity
Time Frame: seven days
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seven days
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Azfar G Zaman, MD FRCP, Consultant cardiologist and Honoraray Lecturer
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
General Publications
- Natarajan A, Marshall SM, Worthley SG, Badimon JJ, Zaman AG. The presence of coronary artery disease increases platelet-dependent thrombosis in patients with type 2 diabetes mellitus. J Thromb Haemost. 2008 Dec;6(12):2210-3. doi: 10.1111/j.1538-7836.2008.03176.x. Epub 2008 Oct 1. No abstract available.
- Osende JI, Badimon JJ, Fuster V, Herson P, Rabito P, Vidhun R, Zaman A, Rodriguez OJ, Lev EI, Rauch U, Heflt G, Fallon JT, Crandall JP. Blood thrombogenicity in type 2 diabetes mellitus patients is associated with glycemic control. J Am Coll Cardiol. 2001 Nov 1;38(5):1307-12. doi: 10.1016/s0735-1097(01)01555-8.
- Shechter M, Merz CN, Paul-Labrador MJ, Kaul S. Blood glucose and platelet-dependent thrombosis in patients with coronary artery disease. J Am Coll Cardiol. 2000 Feb;35(2):300-7. doi: 10.1016/s0735-1097(99)00545-8.
- Helft G, Osende JI, Worthley SG, Zaman AG, Rodriguez OJ, Lev EI, Farkouh ME, Fuster V, Badimon JJ, Chesebro JH. Acute antithrombotic effect of a front-loaded regimen of clopidogrel in patients with atherosclerosis on aspirin. Arterioscler Thromb Vasc Biol. 2000 Oct;20(10):2316-21. doi: 10.1161/01.atv.20.10.2316.
- Natarajan A, Zaman AG, Marshall SM. Platelet hyperactivity in type 2 diabetes: role of antiplatelet agents. Diab Vasc Dis Res. 2008 Jun;5(2):138-44. doi: 10.3132/dvdr.2008.023.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
August 1, 2009
Primary Completion (Actual)
December 1, 2010
Study Completion (Actual)
April 1, 2012
Study Registration Dates
First Submitted
August 1, 2008
First Submitted That Met QC Criteria
August 4, 2008
First Posted (Estimate)
August 5, 2008
Study Record Updates
Last Update Posted (Estimate)
October 12, 2015
Last Update Submitted That Met QC Criteria
October 7, 2015
Last Verified
October 1, 2015
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Heart Diseases
- Cardiovascular Diseases
- Vascular Diseases
- Glucose Metabolism Disorders
- Metabolic Diseases
- Arteriosclerosis
- Arterial Occlusive Diseases
- Endocrine System Diseases
- Embolism and Thrombosis
- Coronary Artery Disease
- Myocardial Ischemia
- Coronary Disease
- Diabetes Mellitus
- Diabetes Mellitus, Type 2
- Thrombosis
- 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
- 3639a
- British Heart Foundation (Other Grant/Funding Number: FS/033/07)
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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