Add time:08/22/2019         Source:sciencedirect.com

The involvement of atriopeptin in hypertension was investigated in spontaneously hypertensive rats (SHR). It was found that intravenous injection of atriopeptin III (20 – 80 nmol/kg) markedly decreased the mean arterial pressure in anesthetized SHR in a dose dependent manner. The heart rate was not significantly affected. The contents of atriopeptin immunoreactive material in the rat atrium and plasma were measured with radioimmuno-assay. Both the atrium and plasma contents of atriopeptin immunoreactive material were found to be significantly higher in SHR than in the normotensive control Wistar Kyoto (WKY), indicating an increase in the biosynthesis and release of atriopeptin in SHR. Whether this change was a compensatory response induced by hypertension remains to be investigated.

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