Key result
Drinking 1% NaCl for 14 days produced significantly greater changes in sympathetic nerve activity and arterial blood pressure in response to l-glutamate and GABA injections into the RVLM.
Why the study?
Does increased dietary salt enhance sympathoexcitatory and sympathoinhibitory responses from the RVLM in rats?
Population
Male Sprague-Dawley rats fed normal chow
Comparison
Access to 1% NaCl solution for 1, 7, 14, or 21… vs Access to water
Design
Preclinical
Follow-up
Up to 21 days
Authors
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High-salt diet exaggerates RVLM pressor responses in rats; leaves open whether SNA mechanisms inform human salt-sensitive hypertension management.
Does increased dietary salt enhance sympathoexcitatory and sympathoinhibitory responses from the RVLM in rats?
Increased dietary salt induces a slowly developing and reversible neuronal plasticity in the RVLM, enhancing both sympathoexcitatory and sympathoinhibitory responses.
Adams et al. (2007) studied this question. 1% NaCl solution vs. water was evaluated on Renal sympathetic nerve activity, splanchnic sympathetic nerve activity, and arterial blood pressure responses to l-glutamate and gamma-aminobutyric acid. Drinking 1% NaCl for 14 days produced significantly greater changes in sympathetic nerve activity and arterial blood pressure in response to l-glutamate and GABA injections into the RVLM.
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