Urate-induced acute renal failure and chronic inflammation in liver-specific Glut9 knockout mice.

Détails

ID Serval
serval:BIB_F25B127A38C2
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Urate-induced acute renal failure and chronic inflammation in liver-specific Glut9 knockout mice.
Périodique
American Journal of Physiology. Renal Physiology
Auteur(s)
Preitner F., Laverriere-Loss A., Metref S., Da Costa A., Moret C., Rotman S., Bazin D., Daudon M., Sandt C., Dessombz A., Thorens B.
ISSN
1522-1466 (Electronic)
ISSN-L
1522-1466
Statut éditorial
Publié
Date de publication
2013
Volume
305
Numéro
5
Pages
F786-F795
Langue
anglais
Résumé
Plasma urate levels are higher in humans than rodents (240-360 vs. â^¼30 μM) because humans lack the liver enzyme uricase. High uricemia in humans may protect against oxidative stress, but hyperuricemia also associates with the metabolic syndrome, and urate and uric acid can crystallize to cause gout and renal dysfunctions. Thus, hyperuricemic animal models to study urate-induced pathologies are needed. We recently generated mice with liver-specific ablation of Glut9, a urate transporter providing access of urate to uricase (LG9KO mice). LG9KO mice had moderately high uricemia (â^¼120 μM). To further increase their uricemia, here we gavaged LG9KO mice for 3 days with inosine, a urate precursor; this treatment was applied in both chow- and high-fat-fed mice. In chow-fed LG9KO mice, uricemia peaked at 300 μM 2 h after the first gavage and normalized 24 h after the last gavage. In contrast, in high-fat-fed LG9KO mice, uricemia further rose to 500 μM. Plasma creatinine strongly increased, indicating acute renal failure. Kidneys showed tubule dilation, macrophage infiltration, and urate and uric acid crystals, associated with a more acidic urine. Six weeks after inosine gavage, plasma urate and creatinine had normalized. However, renal inflammation, fibrosis, and organ remodeling had developed despite the disappearance of urate and uric acid crystals. Thus, hyperuricemia and high-fat diet feeding combined to induce acute renal failure. Furthermore, a sterile inflammation caused by the initial crystal-induced lesions developed despite the disappearance of urate and uric acid crystals.
Mots-clé
SLC2A9, glucose transporter 9, urate, crystal, acute renal failure, sterile inflammation
Pubmed
Web of science
Création de la notice
10/10/2013 8:22
Dernière modification de la notice
20/08/2019 16:19
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