Interactions between sodium and angiotensin

Clinical and Experimental Pharmacology & Physiology
T Morgan

Abstract

1. Increased sodium intake causes decreased formation of angiotensin (Ang) II and increased AngII causes increased Na+ retention. 2. Increased sodium intake and increased AngII causes cardiac hypertrophy, but decreased sodium intake regresses cardiac hypertrophy despite high AngII levels. Likewise, decreased Na+ and blockers of the renin-angiotensin system (RAS) in neonatal rats have similar effects on subsequent blood pressure development. 3. Cardiac hypertrophy due to renal hypertension does not regress when the RAS is blocked and rats are on a high salt intake. Likewise, sodium restriction alone does not cause regression; combination of reduced NaCl intake and RAS blockade is required. 4. High doses of perindopril and losartan in combination cause a syndrome in rats on 0.2% NaCl that leads to profound hypotension, polyuria, renal impairment and involution of the heart and death. This is reversed or prevented by a high (4%) NaCl intake, which also prevents the plasma angiotensinogen depletion that occurs with combined blockade on 0.2% NaCl intake. 5. Intake of NaCl and AngII interact at many levels. It is postulated that there is an important interaction at the cellular level that can explain the above events.

References

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Citations

Jul 1, 2009·Animal : an International Journal of Animal Bioscience·M A ChadwickD K Revell
Oct 4, 2012·Animal : an International Journal of Animal Bioscience·S H TayD K Revell
Feb 28, 2007·Clinical and Experimental Pharmacology & Physiology·Micheline M de Resende, José G Mill
Mar 28, 2009·Physiology & Behavior·M A ChadwickD K Revell
Oct 16, 2004·Journal of Human Hypertension·T KuznetsovaUNKNOWN European Project On Genes in Hypertension (EPOGH) Investigators
Mar 29, 2007·American Journal of Physiology. Renal Physiology·Di ZhaoKailash N Pandey

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