首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Distant effects of unilateral renal ischemia/reperfusion on contralateral kidney but not lung in rats: the roles of ROS and iNOS
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Distant effects of unilateral renal ischemia/reperfusion on contralateral kidney but not lung in rats: the roles of ROS and iNOS

机译:单侧肾缺血/再灌注对大鼠对侧肾脏而非肺的远距离影响:ROS和iNOS的作用

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摘要

Acute kidney injury is usually associated with distant organ dysfunction. The roles of inducible nitric oxide synthase (iNOS) and reactive oxygen species (ROS) in this phenomenon were investigated following 2 h unilateral renal ischemia and 24 h reperfusion. There were 3 groups of rats subjected to either unilateral ischemia/reperfusion (UIR group), unilateral nephrectomy (UNX group), or sham operation. Two further groups were given alpha-tocopherol and aminoguanidine with UIR (treated-UIR group) and UNX (treated-UNX group). Plasma nitriteitrate and malondialdehyde were elevated only in the UIR group. Creatinine clearance and blood flow increased in non-ischemic kidney of the UIR, but not to the same extent as remnant kidney of the UNX group, while they had equal compensatory rises in absolute Na+ and K+ excretion and urine flow. Non-ischemic kidney of the treated-UIR group, but not remnant kidney of the treated-UNX group, showed more elevation in blood flow, whereas both kidneys had reductions in absolute Na+ excretion and urine flow. Respiratory functional variable were not different between all groups. Therefore, 2 h unilateral renal ischemia and 24 h reperfusion did not affect lung but had distant effects on contralateral kidney partly mediated by ROS and NO-derived from iNOS to dampen compensatory increases in renal hemodynamics and to decrease tubular reabsorption.
机译:急性肾损伤通常与远处器官功能障碍有关。在单侧肾缺血2小时和再灌注24小时后,研究了诱导型一氧化氮合酶(iNOS)和活性氧(ROS)的作用。有3组大鼠接受单侧缺血/再灌注(UIR组),单侧肾切除术(UNX组)或假手术。另外两个组分别给予α-生育酚和氨基胍联合UIR(治疗的UIR组)和UNX(治疗的UNX组)。血浆亚硝酸盐/硝酸盐和丙二醛仅在UIR组升高。 UIR的非缺血性肾脏的肌酐清除率和血流量增加,但与UNX组的残余肾脏不同,但其Na +和K +排泄的绝对排泄量和尿液流量具有相等的补偿性增加。经治疗的UIR组的非缺血性肾脏,而非经治疗的UNX组的残余肾脏,显示血流量更多升高,而两个肾脏的绝对Na +排泄和尿液流量均减少。两组之间的呼吸功能变量无差异。因此,2小时的单侧肾脏缺血和24小时的再灌注并不影响肺部,但对对侧肾脏产生了远距离影响,部分是由iNOS的ROS和NO介导的,以抑制肾脏血液动力学的代偿性增加并减少肾小管重吸收。

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