Phase 4
N=6
CES1 Carriers in the PAPI Study
Heart Diseases · Coronary Disease · Coronary Artery Disease · Cardiovascular Diseases · Myocardial Ischemia
Bottom Line
View on ClinicalTrials.gov: NCT03188705 ↗Enrolled (actual)
6
Serious AEs
0.0%
Results posted
Jun 2023
Primary outcome: Primary: Changes in Platelet Function in Response to Clopidogrel — 37.4; 20.4 percentage of maximum aggregation change
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 4
- Interventions
- Clopidogrel (Drug); Aspirin (Drug)
- Age
- Adult, Older Adult · 20+ yrs
- Sex
- All
- Sponsor
- University of Maryland, Baltimore
- Primary completion
- Jan 2020
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Changes in Platelet Function in Response to Clopidogrel |
37.4; 20.4 | — |
| PRIMARY Changes in Platelet Function in Response to Clopidogrel Plus Aspirin |
38.0; 55.8 | — |
Summary
This study builds, in part, upon preliminary results generated as part of the Pharmacogenomics Anti-Platelet Intervention (PAPI) Study (NCT00799396). The purpose of this investigation is to assess the impact of genetic variation in the carboxylesterase 1 (CES1) on response to clopidogrel as well as dual antiplatelet therapy (i.e. clopidogrel and aspirin), as assessed by ex vivo platelet aggregometry, in healthy Amish individuals. The investigators hypothesize that participants who carry alleles that modify the activity or expression of CES1 will have altered response to clopidogrel as well as dual antiplatelet therapy.
Eligibility Criteria
Inclusion Criteria
- Age 20 years or older
- Of Old Order Amish descent
Exclusion Criteria
- Currently pregnant or less than 6 months have passed since delivery
- Currently breast feeding
- Has a history of a bleeding disorder or major spontaneous bleed, such as peptic ulcer, epistasis, or intracranial bleed
- Has severe hypertension, defined by a blood pressure above 160/95 mm Hg
- Takes medications that would affect the outcome(s) to be measured and cannot willingly and safely, in the opinion of the treating physician and study physician, discontinue these medications for 1 week prior to protocol initiation
- Is taking vitamins or other supplements and is unwilling to discontinue use for at least 1 week prior to study
- Has a coexisting malignancy
- Has a creatinine level greater than 2.0 mg/dl, aspartate transaminase (AST) or alanine transaminase (ALT) greater than two times the upper limit of normal, hematocrit less than 32%, or a thyroid-stimulating hormone (TSH) less than 0.4 or greater than 5.5 mIU/L
- Has a bleeding disorder or history of gastrointestinal bleeding or other major bleeding episode
- Is currently taking aspirin, clopidogrel, or anti-coagulants, such as warfarin, heparin, or GPIIb/IIIa antagonists, and have conditions that might place the participant at increased risk from withdrawal of these medications 14 days prior to protocol initiation
- History of unstable angina, heart attack, angioplasty (including stent placement), coronary artery bypass surgery, atrial fibrillation, stroke or transient ischemic attacks, diabetes, or deep vein thrombosis or other thrombosis
- Has polycythemia, or thrombocytosis, defined by a platelet count greater than 500,000
- Has thrombocytopenia, defined by a platelet count less than 75,000
- Has had surgery within the last 6 months
- Has an aspirin or clopidogrel allergy
Data sourced from ClinicalTrials.gov (NCT03188705). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.