ArticleMolecular & cellular proteomics : MCP2026
Surface Proteomics of Cancer-Derived Extracellular Vesicles Reveals Universal Heat Shock Proteins and Cancer Signatures.
Article in Molecular & cellular proteomics : MCP, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Extracellular vesicles (EVs) secreted by cancer cells are a valuable source of noninvasive biomarkers, as they are released into biofluids and reflect the molecular makeup of their cells of origin. To enable direct capture and detection of cancer-derived EVs, detailed knowledge of their surface proteome is essential. Here, we combined mild enzymatic treatment with mass spectrometry to analyze outward-facing proteins of EVs across a panel of 18 cell lines. This approach identified 1094 EV-associated surface proteins, including 144 transmembrane proteins involved in cellular communication and transport. Peptide-level analyses revealed that nearly 50% of multi-pass transmembrane proteins, such as ATP1A1, displayed their intracellular domains on the external EV surface. Out of a core set of 112 EV surface proteins shared across all cancer types, we report a top list of 15 highly abundant EV-surface proteins including ATP1A1, heat shock proteins (HSP)A8 and HSP90AB1 and nuclear proteins linked to EV biogenesis and cancer progression. This comprehensive profiling of EV surface proteomes from diverse cancer types reveals a robust set of pan-cancer EV surface markers with potential for diagnostic analysis.
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