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Clinical Trial Summary

This phase 2 study will include patients suffering from type 2 diabetes mellitus and will first study their response to enteric coated aspirin at a dose of 80 mg per day for a 7-day period. Participants with an incomplete platelet inhibition after exposure to EC aspirin at doses of 80 mg once daily will be randomized to a random order of 3 different ASA regimens: EC ASA 162 mg once daily, EC ASA 81 mg twice daily and chewable ASA 40 mg twice daily. The aims are to determine the feasibility of a larger scale trial, and to determine the regimen associated with the lowest proportion of non-responders after randomization. Platelet function will be assessed at baseline and at day 7 of each arms of the study.


Clinical Trial Description

APPEASED II is a triple crossover, open-label, randomized controlled pilot trial preceded by a 7-day run in period, aiming to determine the feasibility of a larger confirmatory randomized trial, and to determine the regimen associated with the lowest proportion of non-responders after randomization of EC ASA 162 mg once daily, EC ASA 81 mg twice daily and chewable ASA 40 mg twice daily in patients with type 2 diabetes.The primary endpoint will be to determine, among initial ASA non-responder participants in the run-in phase, the proportion of participants that remain ASA non-responders with different formulations and dosing regimens of ASA, including EC ASA 162 mg once daily, EC ASA 81 mg twice daily and chewable ASA 40 mg twice daily. The incomplete platelet aggregation will be evaluated by the response to arachidonic acid at a concentration of 1mM, measured by LTA (Light Transmission Aggregometry). For every platelet function assessment, serum salicylate concentration will also be measured. Upon the screening visit (day 0), blood will be drawn and baseline platelet function will be assessed. A 7 day supply of aspirin will be given to participants meeting the eligibility criteria. Participants will be instructed to take 1 dose of 80 mg of enteric coated aspirin per day at the same time every day. Upon day 7, participants will return for a second visit before the intake of their daily aspirin, and therefore 24 hours after the previous dose of aspirin was taken. Blood will be drawn and platelet function will be assessed in the same manner as described previously. Participants will then take their 7th dose of aspirin under supervision, and a blood sample will be collected and platelet function will be assessed two hours later. If participants have an incomplete platelet inhibition after exposure to EC aspirin at doses of 80 mg once daily, they will be randomized to a random order of 3 different ASA regimens: EC ASA 162 mg once daily, EC ASA 81 mg twice daily and chewable ASA 40 mg twice daily. These participants will receive the pillbox containing the first assigned regimen on this visit. The 3 study arms and the run-in phase will last 7 days each, with at least 7 days of wash-out between each arm. To accommodate participants with busy schedules and to minimize follow-up losses, a longer washout period will be tolerated if the participant is unable to return to the research center after 14 days. At every visit of the randomized portion of the trial, participants will leave with the next 6-day ASA regimen in a pillbox, that is 6 doses for the once daily regimen and 13 doses for the twice daily regimens. On day 7 of all three study arms, patients will be questioned about medication adherence with the presence of the participant's pillbox. Two blood samples will be collected, one 24 hours after the last dose and one 2 hours after taking the last dose in front of the investigators. The platelet aggregation inhibition with arachidonic acid and platelet reactivity to various agonists will be assessed by LTA. Serum levels of TxB2 will also be assessed. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05702463
Study type Interventional
Source Montreal Heart Institute
Contact Guillaume Marquis Gravel, MD, MSc
Phone 514-376-3330
Email guillaume.marquis.gravel@umontreal.ca
Status Recruiting
Phase Phase 1
Start date June 13, 2023
Completion date June 8, 2024

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