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Role of angiotensin in renal sympathetic activation in nephrotic syndrome.

机译:血管紧张素在肾病综合征肾交感激活中的作用。

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摘要

The effect of type 1 angiotensin II receptor antagonist treatment (losartan) on cardiac baroreflex regulation of renal sympathetic nerve activity (RSNA) and renal sodium handling in rats with nephrotic syndrome was examined. After intravenous losartan administration, with arterial pressure normalized by intravenous methoxamine, basal RSNA was decreased 14 +/- 3% in arterial baroreceptor-intact rats and by 21 +/- 5% in arterial baroreceptor-denervated rats. Intracerebroventricular losartan, which did not affect arterial pressure, decreased basal RSNA activity by 15 +/- 1%. Both intravenous and intracerebroventricular losartan augmented the renal sympathoinhibitory response to acute volume loading, and this was associated with an enhanced natriuretic response to the acute volume load. In nephrotic syndrome, acute losartan administration improved cardiac baroreflex regulation of RSNA, which was associated with improved ability to excrete acute sodium loads.
机译:检查了1型血管紧张素II受体拮抗剂(洛沙坦)对肾病综合征大鼠心脏压力反射调节肾交感神经活性(RSNA)和肾钠处理的影响。静脉注射氯沙坦后,通过静脉注射甲氧胺使动脉压正常化,在动脉压力感受器完好无损的大鼠中,基础RSNA降低14 +/- 3%,在动脉压力感受器去神经化的大鼠中降低21 +/- 5%。不影响动脉压的脑室内氯沙坦使基础RSNA活性降低15 +/- 1%。静脉内和脑室内氯沙坦都增强了对急性容量负荷的肾脏交感神经抑制反应,这与利尿钠对急性容量负荷的反应增强有关。在肾病综合征中,急性洛沙坦给药可改善RSNA的心脏压力反射调节,这与提高排出急性钠负荷的能力有关。

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