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.
Roman, Richard J.
中科院分区:
医学1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.

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虽然已知花生四烯酸代谢物20-羟基二十碳四烯酸(20-HETE)有助于心脏和大脑的缺血性损伤,但其在肾损伤中的作用尚不清楚。在这里,我们确定了20-HETE类似物,20-羟基二十碳-5(Z),14(Z)-二烯酸(5,14 −20-HEDE)和N-[20-羟基二十碳-5(Z),14(Z)-二烯酰基]甘氨酸(5,14 −20-HEDGE)以及20-HETE合成抑制剂N-羟基-N-(4-丁基-2-甲基苯基)甲脒(HET 0016)对缺血再灌注损伤的影响。使用Sprague-Dawley大鼠,我们发现,虽然用抑制剂治疗加重了肾损伤,但与溶媒或紫杉醇治疗的大鼠相比,输注5,14 −20-HEDE和5,14 −20-HEDGE显著减轻了损伤。在对照组大鼠中,再灌注后1小时,通过激光多普勒血流仪测量的延髓血流量下降到基线的一半,但5,14 −20-HEDGE完全阻止了这一点。用5,14 −20-HEDGE处理对照动物增加尿量和钠排泄,而不改变其平均动脉压或肾小球滤过率。我们的研究结果表明,20-HETE类似物通过抑制肾小管钠转运和防止缺血后髓质血流下降来保护肾脏免受缺血再灌注损伤。20-HETE类似物可能用于治疗急性缺血性肾损伤。
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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DOI: 10.1111/j.1523-1755.2004.761_2.x
发表时间: 2004-08-01
影响因子: 19.6
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通讯作者: Zuk, A