Dissociation between plasma and atrial content of atrial natriuretic polypeptide (ANP) following sodium load in rats.
Journal: 1987/February - Life Sciences
ISSN: 0024-3205
PUBMED: 2948089
Abstract:
To investigate the time course effect of sodium intake on release and synthesis of atrial natriuretic polypeptide (ANP), plasma and atrial content of ANP were measured in rats which had been fed either a high or a low salt diet for 1, 3, 7, 14 and 35 days. Plasma ANP in rats fed the high salt diet for one day was significantly higher than in those fed the low salt diet. However, there were no significant differences between the groups fed either the high or the low salt diet for 3 days or more. In contrast to the direction of change in plasma ANP, atrial content of ANP in rats fed the high salt diet for one day tended to be lower and was significantly lower in those fed for 3 and 7 days than in the low salt diet group, while there were no significant differences between both groups that were fed for 14 and 35 days. These results suggest that ANP is rapidly released into the circulation when sodium is loaded, however, the atrial storage of ANP remains depleted for about one week.
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