Abstract
Stroke-prone spontaneously hypertensive rats (SHRSP) and stroke-resistant SHR (SHRSR) exhibited an increased preference for a 2% NaCl solution, relative to water, in comparison with normotensive Wistar-Kyoto (WKY), but the preference was lost quickly in SHRSP with unbroken exposure. Neither a high protein diet (50% fish protein) nor a low protein diet (5% protein) changed the salt water preference in SHRSR and the former abolished the preference more quickly in SHRSP. The fish protein diet, however, increased the ratio of urinary sodium excretion to dietary sodium intake in the first three days of exposure to a high salt intake in all groups. Results from this experiment suggest that an increased dietary protein intake can facilitate sodium excretion and may possibly ameliorate the adverse effect of a high sodium diet.
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