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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Am+Soc+Nephrol
2014 ; 25
(6
): 1237-54
Nephropedia Template TP
gab.com Text
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English Wikipedia
Genetic targeting or pharmacologic inhibition of NADPH oxidase nox4 provides
renoprotection in long-term diabetic nephropathy
#MMPMID24511132
Jha JC
; Gray SP
; Barit D
; Okabe J
; El-Osta A
; Namikoshi T
; Thallas-Bonke V
; Wingler K
; Szyndralewiez C
; Heitz F
; Touyz RM
; Cooper ME
; Schmidt HH
; Jandeleit-Dahm KA
J Am Soc Nephrol
2014[Jun]; 25
(6
): 1237-54
PMID24511132
show ga
Diabetic nephropathy may occur, in part, as a result of intrarenal oxidative
stress. NADPH oxidases comprise the only known dedicated reactive oxygen species
(ROS)-forming enzyme family. In the rodent kidney, three isoforms of the
catalytic subunit of NADPH oxidase are expressed (Nox1, Nox2, and Nox4). Here we
show that Nox4 is the main source of renal ROS in a mouse model of diabetic
nephropathy induced by streptozotocin administration in ApoE(-/-) mice. Deletion
of Nox4, but not of Nox1, resulted in renal protection from glomerular injury as
evidenced by attenuated albuminuria, preserved structure, reduced glomerular
accumulation of extracellular matrix proteins, attenuated glomerular macrophage
infiltration, and reduced renal expression of monocyte chemoattractant protein-1
and NF-?B in streptozotocin-induced diabetic ApoE(-/-) mice. Importantly,
administration of the most specific Nox1/4 inhibitor, GKT137831, replicated these
renoprotective effects of Nox4 deletion. In human podocytes, silencing of the
Nox4 gene resulted in reduced production of ROS and downregulation of
proinflammatory and profibrotic markers that are implicated in diabetic
nephropathy. Collectively, these results identify Nox4 as a key source of ROS
responsible for kidney injury in diabetes and provide proof of principle for an
innovative small molecule approach to treat and/or prevent chronic kidney
failure.