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Scullion, Kathleen M.; Vliegenthart, A. D. Bastiaan; Rivoli, Laura; Oosthuyzen, Wilna; Farrah, Tariq E.; Czopek, Alicja; Webb, David J.; Hunter, Robert W.; Bailey, Matthew A.; Dhaun, Neeraj; Dear, James W.
iScience, 01/2021, Volume: 24, Issue: 1Journal Article
Vascular and kidney dysfunction commonly co-exist. There is a need for biomarkers of vascular health. Circulating microRNAs are biomarkers; miR-126 is endothelial cell-enriched. We measured circulating miR-126 in rats with nephrotoxic nephritis (NTN) and humans with acute endothelial and renal injury (vasculitis associated with autoantibodies to neutrophil cytoplasm antigens (ANCAs)). We compared these findings to those from patients with chronic kidney disease (CKD) and end-stage renal disease (ESRD) and explored the relationship between miR-126 and vascular dysfunction. In NTN, miR-126 was reduced. In ANCA vasculitis (N = 70), pre-treatment miR-126 was reduced compared to health (N = 60) (88-fold). miR-126 increased 3.4-fold post-treatment but remained lower than in health (∼26-fold). Argonaute 2-bound miR-126 increased with ANCA vasculitis treatment. miR-126 did not differ between CKD (N = 30) and health but its concentration correlated with endothelial dysfunction. miR-126 was reduced in ESRD (N = 15) (∼350 fold). miR-126 may be a marker of vascular inflammation and could aid decision-making. Display omitted •New biomarkers are needed that report vascular function in patients with kidney disease•The endothelial microRNA, miR-126, was reduced with vascular inflammation (vasculitis)•miR-126 correlated with vascular health in chronic kidney disease•Circulating miR-126 may be a marker of vascular dysfunction Molecular Physiology; Molecular Genetics; Molecular Biology; Immunology
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