Sheela Abraham (@haemev.bsky.social)

Do you love EVs? How about blood, bones and gore? Please check out our latest protocol paper outlining how to enrich for human bone EVs! www.biorxiv.org/content/10.1...

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Enriching for Extracellular Vesicles from Human Bone Extracellular vesicles (EVs) are nano-sized membrane-bound structures thought to be secreted by all cells and increasingly recognized as key mediators of intercellular communication. Established EV isolation protocols for bodily fluids-primarily focus on blood with limited insights into methods optimized for EVs from other hematopoietic regions. In this study, we present a novel protocol for the isolation and enrichment of EVs from human trabecular bone and bone marrow. This method employs a two-step purification strategy, combining iodixanol density cushion (IDC) ultracentrifugation with size exclusion chromatography (SEC), and enables EV recovery from fresh tissue hours after collection. Importantly, this approach facilitates the enrichment of bone-derived EVs without the need for enzymatic digestion or long-term culture, preserving native EV populations. This protocol offers a valuable tool for researchers investigating EVs derived from the diverse cellular constituents of the bone microenvironment. ### Competing Interest Statement The authors have declared no competing interest. Canadian Institutes of Health Research, https://ror.org/01gavpb45, 394568 Terry Fox Research Institute, https://ror.org/00mtf6c40, 1133 https://www.biorxiv.org/content/10.1101/2025.06.18.660234v1