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Article Abstract
Sepsis-associated acute kidney injury (SA-AKI) portends severe health burden due to significant morbidity and mortality, while early diagnosis remains challenging. In this study, proximity-dependent barcoding assay (PBA) is established to profile the surface proteome of single urinary extracellular vesicle (uEV). Principle uEV clusters with unique function and origination are profiled in SA-AKI in a screening cohort. Complement receptor CD35 on single uEV (CD35-uEV) displays high diagnostic accuracy for SA-AKI (AUC-ROC 0.89 in validation cohort, n = 134). Besides, CD35-uEV enables identification of subclinical AKI (AUC-ROC 0.84 in prospective cohort, n = 72). Moreover, CD35-uEV correlates closely with AKI severity which also predicts persistent AKI (AUC-ROC 0.77), mortality risks (AUC-ROC 0.70) and progression to AKD (AUC-ROC 0.66). Multi-omics profiling reveals that CD35-uEV are predominantly released from injured podocytes exhibiting diminished CD35 expression. Overall, this study identifies a single uEV biomarker related to injured podocyte for early diagnosis and risk stratification of SA-AKI.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12307914 | PMC |
| http://dx.doi.org/10.1038/s41467-025-62229-4 | DOI Listing |
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