Ultra-performance LC MS/MS method for quantification of clopidogrel active metabolite

Area of Science:

• Analytical Chemistry
• Pharmacokinetics
• Biomedical Science

Background:

• Clopidogrel is a widely prescribed antiplatelet medication.
• Monitoring clopidogrel active metabolite levels is crucial for assessing therapeutic efficacy and patient compliance.
• Existing quantification methods may be time-consuming or lack the required sensitivity.

Purpose of the Study:

• To develop and validate a rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) method.
• To quantify the active metabolite of clopidogrel in human plasma.
• To apply the validated method in pharmacokinetic studies.

Main Methods:

• Ultra-performance liquid chromatography (UPLC) coupled with tandem mass spectrometry (MS/MS).
• Plasma sample preparation via a single-step acetonitrile protein precipitation.
• Reverse-phase chromatography using a C8 column for separation.
• Quantification using clopidogrel D4 as the internal standard.

Main Results:

• The method demonstrated linearity over a concentration range of 1-150 ng/mL.
• Intra- and inter-day precision were below 17%, with accuracy ranging from 1.7% to 7.5%.
• The lower limit of quantification (LOQ) was determined to be 0.8 ng/mL.
• Total sample analysis time, including preparation, was reduced to 5 minutes.

Conclusions:

• A robust, rapid, and sensitive LC-MS/MS method for clopidogrel active metabolite quantification in human plasma has been successfully developed and validated.
• The optimized method significantly reduces analysis time, making it highly suitable for high-throughput pharmacokinetic studies.
• The method's successful application in a pharmacokinetic study confirms its utility in clinical and research settings.