Fueling the fire in acute kidney injury: endothelial cells collect their Toll
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Updated: Jun 5, 2026

Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
Published on: November 21, 2025
Timothy A Sutton1, Pierre C Dagher
1Division of Nephrology, Department of Medicine and the Indiana Center for Biological Microscopy, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA. tsutton2@iupui.edu
Abstract:
Chen et al. demonstrate endothelial expression of Toll-like receptor 4 (TLR4) in the outer medulla of the kidney early in the course of ischemic acute kidney injury. Furthermore, they provide data that support the hypothesis that activation of endothelial TLR4 in the early extension phase of AKI by damage-associated molecular pattern molecules released from injured tubules results in endothelial activation. This activation can serve to amplify inflammation and tubular damage.
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