Protective effect of 20-HETE analogues in experimental renal ischemia reperfusion injury.
Protective effect of 20-HETE analogues in experimental renal ischemia reperfusion injury.
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DOI:
10.1038/ki.2008.600
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发表时间:
2009-03
影响因子:
19.6
通讯作者:
Roman, Richard J.
中科院分区:
文献类型:
--
作者:
Regner, Kevin R.;Zuk, Anna;Van Why, Scott K.;Shames, Brian D.;Ryan, Robert P.;Falck, John R.;Manthati, Vijay L.;McMullen, Meghan E.;Ledbetter, Steven R.;Roman, Richard J.
While it is known that the arachidonic acid metabolite 20-hydroxyeicosatetraenoic acid (20-HETE) contributes to ischemic injury in the heart and brain, its role in kidney injury is unclear. Here we determined the effects on ischemia-reperfusion injury of the 20-HETE analogues, 20-hydroxyeicosa-5(Z), 14(Z)-dienoic acid (5,14−20-HEDE), and N-[20-hydroxyeicosa-5(Z),14(Z)-dienoyl]glycine (5,14−20-HEDGE), and of the inhibitor of 20-HETE synthesis N-hydroxy-N-(4-butyl-2 methylphenyl) formamidine (HET0016). Using Sprague-Dawley rats we found that while treatment with the inhibitor exacerbated renal injury, infusion of both 5,14−20-HEDE and 5,14−20-HEDGE significantly attenuated injury when compared to vehicle or inhibitor-treated rats. Medullary blood flow, measured by laser-Doppler flowmetry, decreased to half of the baseline one hour after reperfusion in the control rats, but 5,14−20-HEDGE completely prevented this. Treatment of control animals with 5,14−20-HEDGE increased urine output and sodium excretion without altering their mean arterial pressure or glomerular filtration rate. Our results suggest that 20-HETE analogues protect the kidney from ischemia-reperfusion injury by inhibiting renal tubular sodium transport and preventing the post-ischemic fall in medullary blood flow. Analogues of 20-HETE may be useful in the treatment of acute ischemic kidney injury.
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