Comprehensive characterization of protein modifications using mass spectrometry and dry blood spots

Purpose The main objective of this study is to characterize and analyze modified peptides in DBS samples. This includes deciphering their specific PTMs and understanding their potential impact on the population or disease cohort under study. Experimental Design Using mass spectrometry‐based proteomi...

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Bibliographic Details
Published in:Proteomics. Clinical applications 2024-05, Vol.18 (3), p.e2300102-n/a
Main Authors: Guedes, Sofia, Perpétuo, Luís, Veloso, Jacinta, Lima, Tânia, Ferreira, Ana F., Pires, Inês, Savaiva, Francisca, Lourenço, André, Moreira‐Costa, Liliana, Leite‐Moreira, Adelino, Barros, Antonio, Trindade, Fábio, Vitorino, Rui
Format: Article
Language:English
Subjects:
Biological activity
coronary arterial disease
Design of experiments
Dried Blood Spot Testing - methods
dry blood spot
Humans
Mass Spectrometry
Mass spectroscopy
Molecular modelling
Peptides
Peptides - analysis
Peptides - blood
Protein Processing, Post-Translational
Proteome - analysis
Proteomes
proteomic
Proteomics
Proteomics - methods
Scientific imaging
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Summary:Purpose The main objective of this study is to characterize and analyze modified peptides in DBS samples. This includes deciphering their specific PTMs and understanding their potential impact on the population or disease cohort under study. Experimental Design Using mass spectrometry‐based proteomic approaches, we performed a comprehensive analysis of DBS samples. Our focus was on the identification and quantification of modified peptides. We also took advantage of recent advances in DBS mass spectrometry to ensure accurate detection and quantification. Results A comprehensive analysis identified 972 modified peptides in DBS samples. Of these, a subset of 211 peptides was consistently present in all samples, highlighting their potential biological importance and relevance. This indicates a diverse spectrum of PTMs in the proteome of DBS samples. Conclusions and Clinical Relevance Integration of mass spectrometry and proteomics has revealed a broad spectrum of modified peptides in DBS samples and highlighted their importance in biological processes and disease progression. Accurate detection of these PTMs may be critical for risk stratification and disease management. This study improves the understanding of molecular mechanisms underlying biological processes and disease development, providing important insights for clinical applications.
ISSN:1862-8346
1862-8354
DOI:10.1002/prca.202300102