Optimized workflow of EV enrichment from human plasma samples for downstream mass spectrometry analysis
To improve the prognosis of bladder and prostate cancer, highly specific and sensitive biomarkers are needed for early detection, prognosis prediction, and therapeutic stratification. Extracellular vesicles (EV) from plasma could fill this gap due to their potential to serve as cancer biomarkers. Ho...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
27 August 2024
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| In: |
Discover oncology
Year: 2024, Volume: 15, Pages: 1-12 |
| ISSN: | 2730-6011 |
| DOI: | 10.1007/s12672-024-01248-x |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s12672-024-01248-x
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| Author Notes: | Patrick Erwied, Yi Gu, Lena Simon, Martin Schneider, Dominic Helm, Maurice Stefan Michel, Philipp Nuhn, Katja Nitschke, Thomas Stefan Worst |
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| 520 | |a To improve the prognosis of bladder and prostate cancer, highly specific and sensitive biomarkers are needed for early detection, prognosis prediction, and therapeutic stratification. Extracellular vesicles (EV) from plasma could fill this gap due to their potential to serve as cancer biomarkers. However, the enrichment of EV is a major challenge, because the highly abundant plasma proteins are interfering with analytical downstream applications like mass spectrometry (MS). Therefore, the purity requirements of the EV samples must be carefully considered when selecting or developing a suitable EV enrichment method. The aim of this study was to compare a self-designed EV enrichment method based on density cushion centrifugation (DCC) combined with size exclusion chromatography (SEC) and concentration (method 1) with the exoRNeasy midi kit from Qiagen (method 2) and with unprocessed plasma. Furthermore, the single steps of method 1 were evaluated for their effectiveness to enrich EV from plasma. The results showed that the EV samples enriched with method 1 contained the highest levels of EV and exosome markers with simultaneously low levels of highly abundant plasma proteins. In summary, the combination of DCC, SEC and concentration proved to be a promising approach to discover EV-based biomarkers from plasma of cancer patients. | ||
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