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  • Title: Elevated atrial natriuretic polypeptide in plasma of hypertensive Dahl salt-sensitive rats.
    Author: Snajdar RM, Rapp JP.
    Journal: Biochem Biophys Res Commun; 1986 Jun 13; 137(2):876-83. PubMed ID: 2942143.
    Abstract:
    The relationship between circulating atrial natriuretic polypeptide (ANP) and blood pressure was studied in inbred Dahl salt-sensitive (S) and inbred Dahl salt-resistant (R) rats. Two month old S and R rats raised on normal rat chow had only small differences in blood pressure and no difference in plasma ANP levels. In contrast, when 6-month-old rats also raised on normal chow were studied, S had markedly elevated blood pressure and a 4 fold increase in plasma ANP compared to R. Similar strain differences in blood pressure and plasma ANP could be induced in young rats by feeding them diets high in salt. In six week old S and R rats which had been fed high salt diet for 3 weeks the S rats showed higher blood pressure and plasma ANP than R rats. The high plasma ANP levels seen in the hypertensive S rats were interpreted to be a response to hypertension and not a cause of hypertension. There was no qualitative strain difference in the plasma ANP molecule as assessed by reverse phase high pressure liquid chromatography.
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