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Preventive effect of SA13353 [1-[2-(1-adamantyl)ethyl]-1-pentyl-3-[3-(4-pyridyl)propyl]urea], a novel transient receptor potential vanilloid 1 agonist, on ischemia/reperfusion-induced renal injury in rats. | LitMetric

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Article Abstract

Tumor necrosis factor (TNF)-alpha plays a crucial role in the pathogenesis of ischemia/reperfusion-induced renal injury. We demonstrated recently that the preischemic treatment with resiniferatoxin, a transient receptor potential vanilloid 1 (TRPV1) agonist, attenuates renal TNF-alpha mRNA expression and improves ischemia/reperfusion-induced renal injury in rats. In addition, we found that SA13353 [1-[2-(1-adamantyl)ethyl]-1-pentyl-3-[3-(4-pyridyl)propyl]urea], a novel orally active TRPV1 agonist, inhibits TNF-alpha production through the activation of capsaicin-sensitive afferent neurons and reduces the severity of symptoms in established rat collagen-induced arthritis. In the present study, we investigated effects of treatment with SA13353 on ischemia/reperfusion-induced renal injury in rats. Ischemic acute kidney injury (AKI) was induced by occlusion of the left renal artery and vein for 45 min followed by reperfusion, 2 weeks after contralateral nephrectomy. Renal function in vehicle-treated AKI rats markedly decreased at 24 h after reperfusion. Treatment with SA13353 (3, 10, and 30 mg/kg p.o.) 30 min before ischemia dose-dependently attenuated the ischemia/reperfusion-induced renal dysfunction. Histopathological examination of the kidney of AKI rats revealed severe renal damage, which were significantly suppressed by the SA13353 treatment. In renal tissues exposed to ischemia/reperfusion, neutrophil infiltration, superoxide production, TNF-alpha mRNA expression, and cytokine-induced neutrophil chemoattractant-1 mRNA expression were augmented, but these alterations were attenuated by the treatment with SA13353. On the other hand, ischemia/reperfusion-enhanced renal interleukin-10 mRNA expression and its plasma concentration were further augmented by SA13353 treatment. These results demonstrate that the orally active TRPV1 agonist SA13353 prevents the ischemia/reperfusion-induced AKI. This renoprotective effects seem to be closely related to the inhibition of inflammatory response via TRPV1 activation.

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http://dx.doi.org/10.1124/jpet.108.146241DOI Listing

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