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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 Am+J+Physiol+Renal+Physiol
2016 ; 311
(3
): F576-85
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The epoxyeicosatrienoic acid analog PVPA ameliorates cyclosporine-induced
hypertension and renal injury in rats
#MMPMID27358055
Yeboah MM
; Hye Khan MA
; Chesnik MA
; Sharma A
; Paudyal MP
; Falck JR
; Imig JD
Am J Physiol Renal Physiol
2016[Sep]; 311
(3
): F576-85
PMID27358055
show ga
The introduction of calcineurin inhibitors (CNI) into clinical practice in the
late 1970s transformed organ transplantation and led to significant improvement
in acute rejection episodes. However, despite their significant clinical utility,
the use of these agents is hampered by the development of hypertension and
nephrotoxicity, which ultimately lead to end-stage kidney disease and overt
cardiovascular outcomes. There are currently no effective agents to treat or
prevent these complications. Importantly, CNI-free immunosuppressive regimens
lack the overall efficacy of CNI-based treatments and put patients at risk of
allograft rejection. Cytochrome P-450 epoxygenase metabolites of arachidonic
acid, epoxyeicosatrienoic acids (EETs), have potent vasodilator and
antihypertensive properties in addition to many cytoprotective effects, but their
effects on CNI-induced nephrotoxicity have not been explored. Here, we show that
PVPA, a novel, orally active analog of 14,15-EET, effectively prevents the
development of hypertension and ameliorates kidney injury in cyclosporine-treated
rats. PVPA treatment reduced proteinuria and renal dysfunction induced by
cyclosporine. PVPA inhibited inflammatory cell infiltration into the kidney and
decreased renal fibrosis. PVPA also reduced tubular epithelial cell apoptosis,
attenuated the generation of reactive oxygen species, and modulated the unfolded
protein response that is associated with endoplasmic reticulum stress. Consistent
with the in vivo data, PVPA attenuated cyclosporine-induced apoptosis of NRK-52E
cells in vitro. These data indicate that the cytochrome P-450/EET system offers a
novel therapeutic strategy to treat or prevent CNI-induced nephrotoxicity.