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Sökning: WFRF:(Al Mashhadi AL)

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11.
  • Peleli, Maria, et al. (författare)
  • Renal denervation attenuates NADPH oxidase-mediated oxidative stress and hypertension in rats with hydronephrosis
  • 2016
  • Ingår i: American Journal of Physiology - Renal Physiology. - : American Physiological Society. - 0363-6127 .- 1522-1466 .- 1931-857X. ; 310:1, s. F43-F56
  • Tidskriftsartikel (refereegranskat)abstract
    • Hydronephrosis is associated with development of salt-sensitive hypertension. Studies suggest that increased sympathetic nerve activity (SNA) and oxidative stress play important roles in renovascular hypertension. This study aimed to investigate the link between renal SNA and NADPH oxidase (NOX) regulation in the development of hypertension in rats with hydronephrosis. Hydronephrosis was induced by partial unilateral ureteral obstruction (PUUO) in young rats. Sham surgery or renal denervation was performed at the same time. Blood pressure was measured during normal, high and low salt diets. Renal excretion pattern, NOX activity and expression, as well as components of RAAS were characterized. On normal salt diet, PUUO rats had elevated blood pressure compared with controls (115±3 vs 87±1 mmHg), and displayed increased urine production and lower urine osmolality. Blood pressure change in response to salt loading (salt-sensitivity) was more pronounced in the PUUO group compared with controls (15±2 vs 5±1mmHg). Renal denervation in PUUO rats attenuated hypertension (97±3mmHg) and salt-sensitivity (5±1mmHg), and normalized renal excretion pattern, whereas the degree of renal fibrosis and inflammation was not changed. NOX activity and expression, as well as renin and AT1A receptor expression, were increased in renal cortex from PUUO rats, and normalized by denervation. Plasma sodium and potassium levels were elevated in PUUO rats and normalized after renal denervation. Denervation in PUUO rats was also associated with reduced NOX expression, superoxide production and fibrosis in the heart. This study emphasizes a link between renal nerves, NOX function, and development of hypertension.
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