The search for minimally invasive methods for diagnostics of colorectal cancer (CRC) is the most important task for early diagnostics of the disease and subsequent successful treatment. Human plasma represents the main type of biological material used in the clinical practice; however, the complex dynamic range of substances circulating in it complicates determination of CRC protein markers by the mass spectrometric (MS) method. Studying the proteome of extracellular vesicles (EVs) isolated from human plasma represents an attractive approach for the discovery of tissue-secreted CRC markers. We performed shotgun mass spectrometry analysis of EV samples obtained from plasma of CRC patients and healthy volunteers. This MS analysis resulted in identification of 370 proteins (which were registered by at least two peptides). Stable isotope-free relative quantitation identified 55 proteins with altered abundance in EV samples obtained from plasma samples of CRC patients as compared to healthy controls. Among the EV proteins isolated from blood plasma we found components involved in cell adhesion and the VEGFA–VEGFR2 signaling pathway (TLN1, HSPA8, VCL, MYH9, and others), as well as proteins expressed predominantly by gastrointestinal tissues (polymeric immunoglobulin receptor, PIGR). The data obtained using the shotgun proteomic profiling may be added to the panel for targeted MS analysis of EV-associated protein markers, previously developed using CRC cell models.
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Keywords: extracellular vesicles (EVs), human plasma, shotgun mass spectrometric analysis, colorectal cancer
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Soloveva N.A., Novikova S.E., Farafonova T.E., Tikhonova O.V., Zgoda V.G., Archakov A.I. (2024) Proteome of plasma extracellular vesicles as a source of colorectal cancer biomarkers. Biomeditsinskaya Khimiya, 70(5), 356-363.
Soloveva N.A. et al. Proteome of plasma extracellular vesicles as a source of colorectal cancer biomarkers // Biomeditsinskaya Khimiya. - 2024. - V. 70. -N 5. - P. 356-363.
Soloveva N.A. et al., "Proteome of plasma extracellular vesicles as a source of colorectal cancer biomarkers." Biomeditsinskaya Khimiya 70.5 (2024): 356-363.
Soloveva, N. A., Novikova, S. E., Farafonova, T. E., Tikhonova, O. V., Zgoda, V. G., Archakov, A. I. (2024). Proteome of plasma extracellular vesicles as a source of colorectal cancer biomarkers. Biomeditsinskaya Khimiya, 70(5), 356-363.
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