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The effect of tezosentan after cold ischemia and renal artery clamping as a model of reperfusion injury in newborn piglets.

Abstract：

BACKGROUND:Cold ischemia and clamping of the renal artery contribute to acute tubular necrosis and renal dysfunction of transplant grafts. The mechanism of ischemic injury is not fully understood, but endothelin (ET)-1 and -2 have been found to participate in reperfusion injury. ET receptor blockade has been shown to have renoprotective effects in both warm and cold reperfusion injury. OBJECTIVE:We sought to assess the effect of tezosentan, a competitive ET antagonist, on piglet renal function during cold ischemia and renal artery clamping. DESIGN/METHODS:Sixteen piglets (7 to 10 days old) were prepped and assigned to three experimental groups: piglets with kidneys clamped (KCLAMP), with kidneys wrapped in ice (KICE), and piglets treated with tezosentan injected after 45 minutes of clamping and ice (KTEZO). Preexperiment parameters including vital signs, urine volume, glomerular filtration rate (GFR), paraaminohippuric acid clearance (CPAH), fractional excretion of sodium and potassium (FeNa, FeK), and renal blood flow (RBF) were measured at baseline, then at 1- and 2-hour intervals. RESULTS:The decrease in urine volume was comparable in both KCLAMP and KICE groups, but no UV decrease was observed in KTEZO group. RBF and GFR were similar (26% to 52% decrease) in all three groups. FeNa decreased by >50% in KICE, whereas it increased by 60% in KTEZO when compared with baseline. A similar increase in FeK was observed in all three groups. CONCLUSIONS:Cold ischemia and clamping have deleterious effects on RBF, GFR, and FeNa. ET blockade did not have a renoprotective effect except on urine volume when given soon after the injury.

journal_name

Transplant Proc

journal_title

Transplantation proceedings

authors

Pham J,Beier UH,Fornell L,Chin A,Samuel S,Radhakrishnan J,John E

doi

10.1016/j.transproceed.2008.02.071

subject

Has Abstract

pub_date

2008-06-01 00:00:00

pages

1294-9

issue

5

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(08)00323-0

journal_volume

40

pub_type

杂志文章

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