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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
2014 ; 306
(8
): F873-84
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Remote conditioning or erythropoietin before surgery primes kidneys to clear
ischemia-reperfusion-damaged cells: a renoprotective mechanism?
#MMPMID24523383
Gardner DS
; Welham SJ
; Dunford LJ
; McCulloch TA
; Hodi Z
; Sleeman P
; O'Sullivan S
; Devonald MA
Am J Physiol Renal Physiol
2014[Apr]; 306
(8
): F873-84
PMID24523383
show ga
Acute kidney injury is common, serious with no specific treatment.
Ischemia-reperfusion is a common cause of acute kidney injury (AKI). Clinical
trials suggest that preoperative erythropoietin (EPO) or remote ischemic
preconditioning may have a renoprotective effect. Using a porcine model of warm
ischemia-reperfusion-induced AKI (40-min bilateral cross-clamping of renal
arteries, 48-h reperfusion), we examined the renoprotective efficacy of EPO
(1,000 iu/kg iv.) or remote ischemic preconditioning (3 cycles, 5-min
inflation/deflation to 200 mmHg of a hindlimb sphygmomanometer cuff).
Ischemia-reperfusion induced significant kidney injury at 24 and 48 h (?(2), 1
degree of freedom, >10 for 6/7 histopathological features). At 2 h, a panel of
biomarkers including plasma creatinine, neutrophil gelatinase-associated
lipocalin, and IL-1?, and urinary albumin:creatinine could be used to predict
histopathological injury. Ischemia-reperfusion increased cell proliferation and
apoptosis in the renal cortex but, for pretreated groups, the apoptotic cells
were predominantly intratubular rather than interstitial. At 48-h reperfusion,
plasma IL-1? and the number of subcapsular cells in G2-M arrest were reduced
after preoperative EPO, but not after remote ischemic preconditioning. These data
suggest an intrarenal mechanism acting within cortical cells that may underpin a
renoprotective function for preoperative EPO and, to a limited extent, remote
ischemic preconditioning. Despite equivocal longer-term outcomes in clinical
studies investigating EPO as a renoprotective agent in AKI, optimal clinical
dosing and administration have not been established. Our data suggest further
clinical studies on the potential renoprotective effect of EPO and remote
ischemic preconditioning are justified.