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Neurohormonal regulation of renal function during development.
1Department of Pediatrics, University of Iowa College of Medicine, Iowa City 52242.
The American Journal of Physiology
|June 1, 1988
Summary
Fetal renal physiology is influenced by the neuroadrenergic system and renin-angiotensin system. These systems play distinct roles in regulating blood pressure and kidney function during development.
Area of Science:
- Developmental Physiology
- Renal Physiology
- Neuroendocrinology
Background:
- Fetal renal physiology is complex and influenced by multiple regulatory systems.
- The roles of the neuroadrenergic system and renin-angiotensin system in fetal kidney development are not fully understood.
Purpose of the Study:
- To review current understanding of fetal renal physiology.
- To examine the roles of the neuroadrenergic system and renin-angiotensin system in controlling fetal renal hemodynamics and function.
Main Methods:
- Review of existing literature on fetal renal physiology.
- Analysis of studies investigating renal nerve stimulation and alpha-adrenoceptor antagonism in fetal and newborn animals.
- Discussion of the renin-angiotensin system's role in prenatal and postnatal development.
Main Results:
- Renal innervation is present early in fetal life but has minimal impact on resting renal hemodynamics in immature animals.
- Renal hemodynamic responses to renal nerve stimulation are diminished in fetuses and newborns compared to adults.
- Alpha-adrenoceptor antagonism during renal nerve stimulation causes renal vasodilation in fetal/newborn sheep, unlike in adults.
Conclusions:
- The neuroadrenergic system's role in modulating fetal renal hemodynamics is limited under resting conditions.
- The renin-angiotensin system is crucial for regulating fetal blood pressure early in development, with its influence on renal hemodynamics emerging later.