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Nitric oxide in the developing kidney

M J Solhaug1, L D Ballèvre, J P Guignard

  • 1Department of Pediatrics and Physiology, Eastern Virginia Medical School, Norfolk 23507, USA.

Pediatric Nephrology (Berlin, Germany)
|August 1, 1996
PubMed
Summary
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Nitric oxide (NO) is crucial for developing kidneys, maintaining renal blood flow (RBF) and glomerular filtration rate (GFR). Its enhanced role in neonates protects against injury during stress.

Area of Science:

  • Nephrology
  • Pediatric Physiology
  • Cardiovascular Regulation

Background:

  • Nitric oxide (NO) is recognized for regulating adult renal function.
  • Emerging evidence highlights NO's critical role in the developing kidney's basal renal blood flow (RBF) and glomerular filtration rate (GFR).

Purpose of the Study:

  • To investigate the critical role of nitric oxide (NO) in maintaining renal function in the developing kidney.
  • To compare the renal hemodynamic and functional responses to NO modulation in immature versus adult kidneys.

Main Methods:

  • Comparative analysis of renal responses to NO synthesis stimulation and inhibition in developing and adult kidneys.
  • Assessment of intrarenal nitric oxide synthase distribution in neonatal kidneys.
  • Evaluation of NO's role in counter-regulating the renin-angiotensin system in the developing kidney.

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Main Results:

  • The immature kidney exhibits heightened responses to NO modulation compared to the adult kidney, independent of prostaglandins.
  • Increased intrarenal NO activity in developing kidneys counter-regulates the activated renin-angiotensin system, affecting vasoconstriction, GFR, and renin release.
  • Nitric oxide synthase distribution differs between neonatal and adult kidneys, indicating specific roles in neonatal RBF and GFR stabilization.

Conclusions:

  • Nitric oxide (NO) is vital for maintaining normal physiological function in the developing kidney.
  • The developing kidney relies on NO to preserve RBF and GFR during hypoxemia, offering protection against acute renal failure.
  • NO plays a key protective role in the immature kidney under pathophysiological stress.