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Vasoactive intestinal peptide: a direct renal natriuretic substance
Clinical Science (London, England : 1979)
|February 1, 1987
Summary
Vasoactive intestinal peptide (VIP) directly impacts kidney function. This study shows VIP increases renal vascular resistance and fractional sodium excretion, indicating direct renal actions.
Area of Science:
- Nephrology
- Endocrinology
- Physiology
Background:
- Vasoactive intestinal peptide (VIP) is a peptide hormone with diverse physiological roles.
- The direct effects of VIP on renal function and circulation were not fully elucidated.
Purpose of the Study:
- To determine if vasoactive intestinal peptide (VIP) acts directly on the kidney.
- To define the specific renal hemodynamic and natriuretic responses to VIP infusion.
Main Methods:
- Conscious male rabbits received intravenous or direct renal artery infusions of VIP.
- Renal plasma flow, glomerular filtration rate, and sodium excretion were measured.
- Systemic arterial pressure and pulse rate were monitored.
Main Results:
- VIP significantly reduced effective renal plasma flow and glomerular filtration rate.
- Renal vascular resistance increased significantly with VIP administration.
- VIP caused a dose-related increase in fractional sodium excretion despite reduced filtered sodium load.
Conclusions:
- Vasoactive intestinal peptide (VIP) exerts direct effects on intrarenal blood vessels and renal tubules.
- VIP's actions lead to increased renal vascular resistance and enhanced fractional sodium excretion.