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2017 ; 2017
(ä): 5903105
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Renoprotective Effects of Aldose Reductase Inhibitor Epalrestat against High
Glucose-Induced Cellular Injury
#MMPMID28386557
El Gamal H
; Eid AH
; Munusamy S
Biomed Res Int
2017[]; 2017
(ä): 5903105
PMID28386557
show ga
Diabetic nephropathy (DN) is the leading cause of end stage renal disease
worldwide. Increased glucose flux into the aldose reductase (AR) pathway during
diabetes was reported to exert deleterious effects on the kidney. The objective
of this study was to investigate the renoprotective effects of AR inhibition in
high glucose milieu in vitro. Rat renal tubular (NRK-52E) cells were exposed to
high glucose (30?mM) or normal glucose (5?mM) media for 24 to 48 hours with or
without the AR inhibitor epalrestat (1??M) and assessed for changes in Akt and
ERK1/2 signaling, AR expression (using western blotting), and alterations in
mitochondrial membrane potential (using JC-1 staining), cell viability (using MTT
assay), and cell cycle. Exposure of NRK-52E cells to high glucose media caused
acute activation of Akt and ERK pathways and depolarization of mitochondrial
membrane at 24 hours. Prolonged high glucose exposure (for 48 hours) induced AR
expression and G1 cell cycle arrest and decreased cell viability (84% compared to
control) in NRK-52E cells. Coincubation of cells with epalrestat prevented the
signaling changes and renal cell injury induced by high glucose. Thus, AR
inhibition represents a potential therapeutic strategy to prevent DN.