LC-MS Analysis of Human Platelets as a Platform for Studying Mitochondrial Metabolism

作者： Andrew J. Worth*1,2, Dylan M. Marchione*2,3, Robert C. Parry1,2, Qingqing Wang2,3, Kevin P. Gillespie2,3, Noelle N. Saillant4, Carrie Sims4, Clementina Mesaros1,2, Nathaniel W. Snyder5, Ian A. Blair1,2 1Center for Cancer Pharmacology,University of Pennsylvania, 2Center for Excellence in Environmental Toxicology,University of Pennsylvania, 3Penn SRP and Department of Systems Pharmacology and Translational Therapeutics,University of Pennsylvania, 4Division of Traumatology, Department of Surgery, Critical Care and Acute Care Surgery,University of Pennsylvania, 5A.J. Drexel Autism Institute,Drexel University

简介：

Overview

This study demonstrates the use of isolated human platelets as an ex vivo model to investigate metabolic adaptations in response to the complex I inhibitor rotenone. The method employs isotopic tracing and liquid chromatography-mass spectrometry for relative quantification, making it applicable to various study designs.

Key Study Components

Area of Science

• Cellular metabolism
• Pharmacology
• Human health relevance

Background

• Understanding how xenobiotics affect cellular metabolism is crucial.
• Isolated human platelets provide a relevant model compared to transformed cell lines.
• This approach can help identify potential interventions for metabolic defects.
• Rotenone is used as a complex I inhibitor to study metabolic changes.

Purpose of Study

• To determine the effects of xenobiotic treatment on cellular metabolism.
• To explore how disease states alter metabolic processes.
• To assess the potential for interventions to correct metabolic defects.

Methods Used

• Preparation of a 10 millimolar stock solution of rotenone in dimethyl sulfoxide.
• Serial dilution of the rotenone stock to obtain varying concentrations.
• Isotopic tracing for metabolic analysis.
• Liquid chromatography-mass spectrometry for quantification.

Main Results

• Isolated platelets effectively model metabolic responses to rotenone.
• Isotopic tracing reveals significant metabolic adaptations.
• Liquid chromatography-mass spectrometry provides accurate quantification.
• The method is applicable to various experimental designs.

Conclusions

• Isolated human platelets are a valuable model for studying metabolism.
• This approach can lead to insights into disease mechanisms and potential therapies.
• Future studies can expand on this method to explore other metabolic pathways.

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