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Control of plasma aldosterone in a patient with Conn's Syndrome before and during spironolactone medication

Regulation des Plasma-Aldosterons bei einer Patientin mit Conn Syndrom vor und unter der Behandlung mit Spironolacton

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Zusammenfassung

Bei einer Patientin mit Conn Syndrom wurden vor und nach einer 9-monatigen Behandlung mit Spironolacton Plasma-Aldosteron, Plasma-Cortisol und Plasma-Renin-Aktivität in kurzen Zeitabständen bestimmt. Vor Behandlung wurde Plasma-Aldosteron episodisch sezerniert; es fand sich eine hochsignifikante Korrelation zwischen Plasma-Aldosteron und Plasma-Cortisol (r=0.817,p<0.001). Die Plasma-Renin-Aktivität lag ständig unterhalb des aufdeckbaren Meßbereiches (<0,16 ng/ml/3 h). Nach 9-monatiger Behandlung mit Spironolacton war in Gegenwart einer deutlich über der Norm erhöhten Plasma-Renin-Aktivität sowohl eine episodische Sekretion des Plasma-Aldosterons als auch eine signifikante Korrelation zwischen Plasma-Aldosteron und Plasma-Cortisol nachweisbar (r=0.819,p<0.001). Erst nach Suppression der ACTH-Sekretion durch Dexamethason fand sich eine schwache K orrelation zwischen Renin-Aktivität und Aldosteron (r=0.517,p<0.05). Unsere Ergebnisse zeigen, daß sowohl vor als auch nach 9-monatiger Behandlung mit Spironolacton die episodische Sekretion des Plasma-Aldosterons bei einer Patientin mit einem aldosteronproduzierenden Nebennierenrindenadenom durch ACTH gesteuert wird. Demagegenüber besitzt endogenes Angiotensin II keinen oder einen nur geringen Einfluß auf die Aldosteron-Sekretion.

Summary

In a patient suffering from Conn's syndrome analysis of short-time fluctuations of plasma aldosterone, plasma cortisol and plasma renin activity were performed before and after a 9-months therapy period with spironolactone. Under the former conditions aldosterone was secreted episodically and a highly significant correlation was found between plasma aldosterone and plasma cortisol (r=0.817,p<0.001) while plasma renin activity was undetectable (<0.16 ng/ml/3 hr). Following a 9-months therapy with spironolactone episodic secretion of aldosterone and the significant correlation between aldosterone and cortisol persisted (r=0.819,p<0.001) in the presence of an abnormally high plasma renin activity. First, when the secretion of ACTH was suppressed by dexamethasone a weak correlation was found between renin activity and aldosterone (r=0.517,p<0.05). Our results show that both before and after a 9-months therapy with spironolactone episodic aldosterone release of an aldosterone producing adrenal adenoma was mediated through ACTH and that endogeneous angiotensin II had no or only little influence.

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Vetter, H., Vetter, W. Control of plasma aldosterone in a patient with Conn's Syndrome before and during spironolactone medication. Klin Wochenschr 53, 391–393 (1975). https://doi.org/10.1007/BF01468678

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