Related Experiment Videos
Adrenomedullin inhibits the pressor effects and decrease in renal blood flow induced by norepinephrine or angiotensin
1Department of Anesthesiology, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Japan. kminami@med.uoeh-u.ac.jp
Japanese Journal of Pharmacology
|July 19, 2001
Summary
Adrenomedullin (AM) lowers blood pressure and protects kidney function. This study shows AM counteracts the hypertensive effects of norepinephrine (NE) and angiotensin II (AII), preserving renal blood flow.
Area of Science:
- Nephrology
- Cardiovascular Physiology
- Endocrinology
Background:
- Adrenomedullin (AM), a peptide regulating renal functions, is elevated in glomerulonephritis alongside hypertensive agents norepinephrine (NE) and angiotensin II (AII).
- The specific impact of AM on NE- or AII-induced pressor responses and renal blood flow remains unclear.
Purpose of the Study:
- To investigate the effects of AM on blood pressure and renal blood flow.
- To determine if AM modulates the pressor and renal blood flow responses to NE or AII in rats.
Main Methods:
- Experiments were conducted on anesthetized rats.
- Arterial blood pressure and renal blood flow were monitored.
- AM, NE, and AII were administered intravenously.
Main Results:
- Intravenous AM administration dose-dependently decreased arterial blood pressure without affecting renal blood flow.
- NE or AII administration increased blood pressure and decreased renal blood flow.
- Co-administration of AM with NE or AII prevented blood pressure increases and attenuated renal blood flow reduction.
Conclusions:
- Adrenomedullin exhibits a protective role against the pressor effects of NE and AII.
- AM mitigates the decrease in renal blood flow induced by NE or AII, suggesting a renoprotective function.