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Updated: Aug 31, 2025

Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
Efficacy of ticagrelor compared to clopidogrel in improving endothelial function in patients with coronary artery
Muayad Saud Albadrani1, Amal Mohamed Elhusein2, Yasir Abdullah Alotaibi2
1College of Medicine, Taibah University, Madena.
Insights
Ticagrelor shows superior endothelial function improvement compared to clopidogrel in coronary artery disease patients. This includes better progenitor cell levels and reduced apoptosis, indicating enhanced vascular health.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
- Vascular Biology
Background:
- Ticagrelor and clopidogrel are P2Y12 receptor inhibitors used as antiplatelet agents.
- Previous research has explored their comparative effects on endothelial function.
Purpose of the Study:
- To systematically review and compare the efficacy of ticagrelor versus clopidogrel in enhancing endothelial function.
- Focus on patients diagnosed with coronary artery disease (CAD).
Main Methods:
- Systematic literature search of Scopus, PubMed, Web of Science, and Cochrane Library in August 2021.
- Inclusion of randomized controlled trials comparing ticagrelor and clopidogrel in CAD patients for endothelial function improvement.
Main Results:
- Seven trials (n=511) were analyzed.
- Ticagrelor significantly increased progenitor cells (CD34+KDR+, CD34+133+) and nitric oxide levels.
- Ticagrelor demonstrated a lower rate of endothelial cell apoptosis and improved levels of reactive oxygen species and soluble P-selectin.
- Flow-mediated dilation results were inconsistent across studies.
Conclusions:
- Ticagrelor appears to offer additional benefits for endothelial function compared to clopidogrel.
- Findings suggest ticagrelor may be more effective in improving vascular health in CAD patients.
Background:
Ticagrelor and clopidogrel are antiplatelet drugs that act by binding to the adenosine diphosphate P2Y12 receptor. Previous studies have compared between them regarding the endothelial function effect.
Objectives:
This systematic review aims to summarize the evidence comparing the efficacy of ticagrelor vs. clopidogrel in improving endothelial function in patients with coronary artery disease (CAD).
Methods:
In August 2021, the Scopus, PubMed, Web of Science, and Cochrane library were searched systematically for eligible trials. We included randomized controlled trials that compared the efficacy of ticagrelor vs. clopidogrel in improving endothelial function in patients with CAD.
Results:
Seven trials (n = 511) were included in our systematic review. Ticagrelor resulted in a greater elevation of the level of progenitor cells CD34+ KDR+ and CD34+ 133+ (P = 0.036 and P = 0.019, respectively), with a lower rate of endothelial cell apoptosis rate (P < 0.001). Moreover, ticagrelor showed superiority regarding nitric oxide, radical oxygen species, and soluble P-selectin levels (P = 0.03, P = 0.02, and P = 0.019, respectively). Flow-mediated dilation findings differed between the studies (P = 0.004 vs. P = 0.39).
Conclusion:
Ticagrelor appears to exert an additional improvement in endothelial function compared with clopidogrel in patients with coronary heart disease.
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