Abstract
The role of angiotensinogen in blood pressure control was assessed in normotensive rats by observing the changes resulting from inhibition by specific rat angiotensinogen antiserum. The antiserum decreased blood pressure in rats on normal sodium as well as sodium-free diets (respectively delta BP = -30 +/- 6 mm Hg and -42 +/- 8 mm Hg). In binephrectomized sodium-replete rats, administration of antiserum did not reduce blood pressure, whereas in sodium-depleted animals it slightly decreased blood pressure by 11 +/- 3 mm Hg. These results suggest that angiotensinogen participates in the regulation of blood pressure in normotensive rats, even in the sodium-replete state.
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