ArticleJournal of extracellular vesicles2026
Small and Large Extracellular Vesicles in Circulation of Diffuse Large B-Cell Lymphoma Patients Originate From Different Cell Types of the Tumor Microenvironment.
Article in Journal of extracellular vesicles, 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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18 authors.
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Abstract
Malignant and non-malignant cells within the tumor microenvironment (TME) actively secrete extracellular vesicles (EVs) that may mediate intercellular communication or enter the blood stream. Circulating EVs in Diffuse Large B-Cell Lymphoma (DLBCL) patients are a promising source of liquid biopsy biomarkers; however, whether different cellular components of the TME preferentially secrete small (S-) and/or large (L-) EVs is still unknown. With an established density-gradient separation protocol and tunable resistive pulse sensing analysis, we demonstrate that DLBCL cells in culture produce 100-1000-fold higher numbers of S-EVs (50-200 nm) compared with L-EVs (200-1000 nm) and very large EVs (>1000 nm). In contrast, the plasma from DLBCL patients contains comparable concentrations of S- and L-EVs, consistent with various cellular origins. Small RNA sequencing showed minor differences in miRNA content between plasma S- and L-EVs; however, messenger RNA sequencing revealed stark differences in cargo between EV-size subtypes and between healthy donors and patients. Deconvolution analysis with single-cell sequencing data from 17 DLBCL tumor tissues as reference using the Statescope algorithm indicated that circulating S-EVs from malignant cells outnumber the L-EVs. In contrast, TME macrophage-, T cell-, and natural killer-derived L-EVs outnumber S-EVs. Together, these findings suggest that circulating S- and L-EVs can originate from distinct cellular compartments within the DLBCL TME, representing complementary biological information. These observations have important implications for the development of EV-based liquid biopsy strategies.
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