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Separation and detection methods for covalent drug-protein adducts
1Department of Pharmacy, Faculty of Science, National University of Singapore, Science Drive 4, Singapore 117543, Singapore. phazsf@nus.edu.sg
Summary
Identifying drug-protein adducts is crucial for understanding drug toxicity. Recent advances in mass spectrometry and proteomics offer powerful new methods for detecting and identifying these adducts, improving toxicological insights.
Area of Science:
- Toxicology
- Analytical Chemistry
- Biochemistry
Background:
- Covalent binding of reactive drug metabolites to proteins is a primary mechanism for drug-induced toxicity.
- Developing sensitive analytical methods for drug-protein adducts is vital for clinical and toxicological applications.
Purpose of the Study:
- To review and highlight separation and detection technologies for drug-protein adducts.
- To discuss the advantages and limitations of various analytical methodologies.
- To outline the application of these techniques to specific drugs and their protein targets.
Main Methods:
- Chromatographic techniques: affinity, ion-exchange, and high-performance liquid chromatography.
- Electrophoretic techniques: SDS-PAGE, 2D SDS-PAGE, and capillary electrophoresis.
- Advanced Mass Spectrometry (MS) coupled with analytical proteomics for identification and sequencing.
Main Results:
- Traditional methods (MS, NMR, immunological) are labor-intensive and provide limited protein sequence information.
- Antibody-based methods are constrained by antibody availability and specificity.
- Proteomics-MS approaches enable identification of unknown adducts and their sequence context within complex proteomes.
Conclusions:
- Significant progress has been made in analytical methodologies for drug-protein adducts.
- Advanced MS and proteomics offer powerful solutions for identifying drug targets and understanding toxicity mechanisms.
- These advancements hold promise for improved clinical applications and drug safety assessment.