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Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
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Clopidogrel resistance and its relevance: Current concepts.
Akshyaya Pradhan1, Monika Bhandari1, Pravesh Vishwakarma1
1Department of Cardiology, King George's Medical University, Lucknow, Uttar Pradesh, India.
Journal of Family Medicine and Primary Care
|July 19, 2024
Summary
Genetic variations in CYP2C19 reduce clopidogogrel effectiveness, increasing risks of stent thrombosis and cardiovascular events. CYP2C19 genotyping can identify patients with clopidogogrel resistance, guiding alternative antiplatelet therapies.
Area of Science:
- Pharmacogenomics
- Cardiovascular Medicine
- Clinical Chemistry
Background:
- Clopidogrel, a P2Y12 receptor inhibitor, is a cornerstone of dual antiplatelet therapy.
- It functions as a prodrug, requiring hepatic metabolism by cytochrome P450 2C19 (CYP2C19) into its active form.
- Reduced efficacy of clopidogogrel is linked to genetic polymorphisms in the CYP2C19 gene.
Purpose of the Study:
- To present a case of coronary stent thrombosis attributed to clopidogogrel resistance.
- To review the literature concerning clopidogogrel resistance and its clinical implications.
- To discuss diagnostic methods, therapeutic strategies, and future directions for managing clopidogogrel resistance.
Main Methods:
- Case report presentation.
- Comprehensive literature review on clopidogogrel resistance and CYP2C19 polymorphisms.
- Analysis of clinical trial data and current treatment guidelines.
Main Results:
- CYP2C19 genetic variants (*2, *3, *4, *5) lead to diminished active metabolite formation, impairing platelet aggregation inhibition.
- This reduced antiplatelet effect is associated with an increased incidence of stent thrombosis and adverse cardiovascular events.
- The presented case highlights a direct link between CYP2C19 genotype and clopidogogrel resistance-induced stent thrombosis.
Conclusions:
- CYP2C19 genotyping is crucial for identifying clopidogogrel resistance.
- Tailoring antiplatelet therapy based on genetic profiles can mitigate risks of stent thrombosis and recurrent cardiovascular events.
- Further research and guideline updates are needed to optimize P2Y12 inhibitor use in diverse patient populations.
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