ArticleInternational journal of nanomedicine2025
Urinary Extracellular Vesicle Analysis Reveals Early Signs of Kidney Inflammation and Damage in Single Ventricle Paediatric Patients After Fontan Operation.
Article in International journal of nanomedicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Urinary Extracellular Vesicles Biomarkers in CKD: Clinical Laboratory Translation.Diagnostics (Basel, Switzerland) · 2026Review
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8 authors.
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Abstract
Background: Extracellular vesicles present in urine (uEVs) are gaining considerable interest as biomarkers, to monitor and predict kidney physio-pathological state. Patients with single ventricle defects and hemodynamic stabilization by Fontan intervention may develop kidney dysfunction as one of the most prevalent extracardiac co-morbidity. Our study aimed to characterize uEVs in children with single ventricle heart defects who underwent Fontan surgery, focusing on markers for monitoring and predicting kidney function, to get physio-pathological insights on possible mechanisms of tissue damage and progression. Methods: We isolated uEVs from urine of 60 paediatric patients affected by single ventricle defects, and from 10 healthy subjects. We analysed uEVs to assess the presence of the reno-protective hormone Klotho, using super resolution microscopy of single uEVs and ELISA. Moreover, we analysed the levels of markers of kidney regeneration, such as CD133 and CD24, and of inflammation using a bead-based cytofluorimetric multiplex analysis. The markers' levels were correlated with patients' demographical, clinical and surgical data. Results: uEVs from children with single ventricle defects showed reduced levels of Klotho and CD133, compared with the ones of healthy subjects. In parallel, the levels of inflammatory markers (CD3, CD56, and HLA-DR) were significantly higher. Interestingly, levels of inflammatory markers correlated with age of patients and distance from surgery. Conclusion: This study demonstrates that single ventricle patients, who underwent Fontan's surgery, present altered levels of uEV biomarkers related to regeneration, inflammation and fibrosis, suggesting the presence of early signs of kidney damage and inflammation, compatible with the complexity of the pathology.
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