Acute kidney injury, characterized by rapid decline in glomerular filtration rate, is a major cause of morbidity and mortality. Renal ischemia reperfusion injury is the leading cause of acute kidney injury and this injury induces a cascade of events l...
Acute kidney injury, characterized by rapid decline in glomerular filtration rate, is a major cause of morbidity and mortality. Renal ischemia reperfusion injury is the leading cause of acute kidney injury and this injury induces a cascade of events leading to cellular damage. Microvascular endothelial cell injury induces loss of renal endothelial function such as regulation of vascular tone, tissue perfusion, permeability, and inflammation. Endothelial dysfunction has detrimental effect upon renal function in ischemic acute kidney injury. A modality to improve endothelial dysfunction in ischemia reperfusion injured kidney can be a good therapeutic approach in renal IRI. Recently, COMP-Angiopoietin(Ang)1, a variant of native Ang1 was developed. However, there is no report about effect of COMP-Ang1 in renal ischemia reperfusion injury.
In this study, I investigated the endothelial protective effect of COMP-Ang1 in renal ischemia reperfusion injury.
I evaluated the tubular injury score after treatment with COMP-Ang1 or LacZ adenovirus in renal ischemia reperfusion injury model in mice. COMP-Ang1 significantly decreased renal IRI-induced tubular damage and improved blood urea nitrogen and serum creatinine. COMP-Ang1 prevented the renal ischemia reperfusion injury-induced decrease of renal blood flow and increased renal vascular permeability, renal vascular resistance. COMP-Ang1 also mitigated the effects of ischemia reperfusion injury on the number of F4/80 positive macrophage infiltrating, monocyte chemoattractant protein-1 expression and increased the number of Ki67 and platelet endothelial cell adhesion molecule-1 positive cells.
These finding indicated that COMP-Ang1 may protect against endothelial dysfunction by renal ischemia reperfusion injury.