Optimization of extracellular vesicles preparation from saliva of head and neck cancer patients

• Verfasst von: Tengler, Luisa [VerfasserIn]
• Verfasst von: Tiedtke, Moritz [VerfasserIn]
• Verfasst von: Schütz, Julia [VerfasserIn]
• Verfasst von: Bieback, Karen [VerfasserIn]
• Verfasst von: Uhlig, Stefanie [VerfasserIn]
• Verfasst von: Theodoraki, Marie-Nicole [VerfasserIn]
• Verfasst von: Nitschke, Katja [VerfasserIn]
• Verfasst von: Worst, Thomas [VerfasserIn]
• Verfasst von: Seiz, Elena [VerfasserIn]
• Verfasst von: Scherl, Claudia [VerfasserIn]
• Verfasst von: Rotter, Nicole [VerfasserIn]
• Verfasst von: Ludwig, Sonja [VerfasserIn]
• Titel: Optimization of extracellular vesicles preparation from saliva of head and neck cancer patients
• Verf.angabe: Luisa Tengler, Moritz Tiedtke, Julia Schütz, Karen Bieback, Stefanie Uhlig, Marie-Nicole Theodoraki, Katja Nitschke, Thomas Stefan Worst, Elena Seiz, Claudia Scherl, Nicole Rotter & Sonja Ludwig
• E-Jahr: 2024
• Jahr: 10 January 2024
• Umfang: 9 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 24.02.2025
• Titel Quelle: Enthalten in: Scientific reports
• Ort Quelle: [London] : Springer Nature, 2011
• Jahr Quelle: 2024
• Band/Heft Quelle: 14(2024), Artikel-ID 946, Seite 1-9
• ISSN Quelle: 2045-2322
• DOI: doi:10.1038/s41598-023-50610-6
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Biomarkers
• Sach-SW: Head and neck cancer
• K10plus-PPN: 1917910363

Abstract

Small extracellular vesicles from saliva (SEVs) have high potential as biomarkers in Head and Neck cancer (HNC). However, there is no common consensus on the ideal method for their isolation. This study compared different ultracentrifugation (UC) methods (durations and + /− additional purification) with size exclusion chromatography (SEC) and investigated the potential of SEVs as diagnostic biomarkers and their biological activity on NK and CD8+ T cells. SEVs from 19 HNC patients and 8 healthy donors (HDs) were thoroughly characterized. Transmission electron microscopy confirmed the isolation of vesicles by all methods. The average size determined via nanoparticle-tracking analysis was smaller for SEVs isolated by SEC than UC. The highest particle-to-protein yield was achieved by UC (3 h + 3 h) (UCopt) and SEC. However, SEC yielded considerably fewer SEVs. Comparing the surface marker cargo, SEVs isolated by UCopt from HNC patients carried more PD-L1, FasL, and TGF-β than SEVs from HDs. These levels correlated with tumor stage and HPV status. SEVs downregulated NKG2D expression on primary NK cells. HNC SEVs accelerated CD8+ T cell death compared to HD SEVs. This study suggests that UCopt is preferable when isolation of a high particle-to-protein load is required. Especially PD-L1 and FasL on SEVs hold substantial potential as diagnostic biomarkers.