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2017 ; 12
(8
): e0183604
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Restored nitric oxide bioavailability reduces the severity of acute-to-chronic
transition in a mouse model of aristolochic acid nephropathy
#MMPMID28832640
Jadot I
; Colombaro V
; Martin B
; Habsch I
; Botton O
; Nortier J
; Declèves AE
; Caron N
PLoS One
2017[]; 12
(8
): e0183604
PMID28832640
show ga
Aristolochic Acid (AA) nephropathy (AAN) is a progressive tubulointerstitial
nephritis characterized by an early phase of acute kidney injury (AKI) leading to
chronic kidney disease (CKD). The reduced nitric oxide (NO) bioavailability
reported in AAN might contribute to renal function impairment and progression of
the disease. We previously demonstrated that L-arginine (L-Arg) supplementation
is protective in AA-induced AKI. Since the severity of AKI may be considered a
strong predictor of progression to CKD, the present study aims to assess the
potential benefit of L-Arg supplementation during the transition from the acute
phase to the chronic phase of AAN. C57BL/6J male mice were randomly subjected to
daily i.p. injections of vehicle or AA for 4 days. To determine whether renal
AA-induced injuries were linked to reduced NO production, L-Arg was added to
drinking water from 7 days before starting i.p. injections, until the end of the
protocol. Mice were euthanized 5, 10 and 20 days after vehicle or AA
administration. AA-treated mice displayed marked renal injury and reduced NO
bioavailability, while histopathological features of AAN were reproduced,
including interstitial cell infiltration and tubulointerstitial fibrosis. L-Arg
treatment restored renal NO bioavailability and reduced the severity of
AA-induced injury, inflammation and fibrosis. We concluded that reduced renal NO
bioavailability contributes to the processes underlying AAN. Furthermore, L-Arg
shows nephroprotective effects by decreasing the severity of acute-to-chronic
transition in experimental AAN and might represent a potential therapeutic tool
in the future.