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Evaluation of Ticagrelor Anti Platelet and Pleiotropic Effects in Patients Undergoing Percutaneous Coronary Intervention for an Acute Coronary Syndrome

NCT01626534 · Status: COMPLETED · Phase: PHASE3 · Type: INTERVENTIONAL · Enrollment: 125

Last updated 2014-08-28

No results posted yet for this study

Summary

Ticagrelor is a new P2Y12 ADP receptor antagonist. This drug demonstrated a faster onset of action and a higher potency compared to clopidogrel standard regimen. Consistently these properties were associated in the PLATO trial, and particularly in the percutaneous coronary intervention (PCI) arm of the study, with a lower incidence of thrombotic complications at one year follow-up but at a price of increased major bleedings (7,8). The major finding of the trial was a significant reduction in one year mortality in patients treated with ticagrelor. This reduction in mortality may not be related to the anti-platelet effect of the drug since another potent anti-platelet agent which was recently commercialized a did not exhibit any improvement in death compared to clopidogrel. Therefore there may be non anti platelet directed properties, or pleiotropic effects, of ticagrelor that could be involved in a reduction in mortality in acute coronary syndrome (ACS) patients. In fact together with its anti platelet properties, ticagrelor, has been shown to inhibit the uptake of adenosine by red cells, leading to an increase in adenosine plasma level and then activating the low affinity adenosine receptor thus potentially affecting the vascular homeostasis including endothelial cells. Therefore, it is hypothesis that the side effects and its benefit on mortality may be related to its interaction with adenosine metabolism. In line with this hypothesis, some adverse effects of ticagrelor (bradycardia and modulation of bronchoconstriction) are compatible with the activation of low affinity A1 or A2A adenosine receptors.

In addition the investigators have recently demonstrated that P2Y12 ADP blockade did impact the endothelial compartment during PCI (9). In fact the investigators have observed that the level of PR inhibition achieved by clopidogrel before PCI correlated with the extent of endothelial damage during PCI. More potent anti platelet drugs such as ticagrelor may thus be associated with reduced peri-procedural endothelial lesion which could further improve the clinical prognosis of patients. The investigators have previously observed that endothelial marker of lesion and regeneration could be measured in the blood post PCI (10).

Finally, in the response trial no patients in the ticagrelor arm had HTPR compared to 50% in the clopidogrel arm (7). This finding is surprising since recent data suggest that some patients still exhibit HTPR following the use of the very potent third generation thienopyridine prasugrel. This may be related to the fact that in the response trial only stable patients were included.

The investigators aimed to evaluate the anti-platelet efficacy and pleiotropic effects of ticagrelor in acute coronary syndromes patients undergoing percutaneous coronary intervention.

Conditions

  • Acute Coronary Syndrome

Interventions

DRUG

Clopidogrel

600mg loading dose then 75mg/day

DRUG

trigagrelor

180 mg loading dose then 90 mg Twice a day

Sponsors & Collaborators

  • Assistance Publique Hopitaux De Marseille

    lead OTHER

Principal Investigators

  • BERNARD BELAIGUES · Assistance Publique hôpitaux de Marseille

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2012-03-31
Primary Completion
2014-02-28
Completion
2014-02-28

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01626534 on ClinicalTrials.gov