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The aim of the present study was to investigate the pathophysiological functions of adrenomedullin (ADM), atrial and brain natriuretic peptides (ANP and BNP) in patients with adrenal medullary hyperplasia (AMH). Plasma ADM, ANP and BNP concentrations were measured in 20 patients with AMH, 35 patients with essential hypertension (EH), and 40 healthy control subjects. Following effective antihypertensive therapy, the values in AMH and EH patients were measured again and laparoscopic adrenalectomy was performed for AMH patients. At 2 weeks after surgery, the three peptides were measured again. The AMH patients had higher plasma concentrations of ADM, ANP and BNP compared with the EH and control subjects. There were significant differences in the values of ADM, ANP and BNP between adrenal vein and inferior vena cava and between AMH and contralateral adrenal vein. Plasma ADM concentration was correlated with serum epinephrine and norepinephrine and urine vanillylmandelic acid, in addition to systolic and diastolic blood pressure, left ventricular ejection fraction, left ventricular mass index and ANP and BNP values in the AMH group. Following antihypertensive treatment, ADM, ANP and BNP were significantly decreased in EH patients, but remained unchanged in AMH subjects. However, these concentrations significantly decreased following surgery. Therefore, the present results suggest that ADM, ANP and BNP may be involved in regulating adrenal medulla functions.

experimental and therapeutic medicine

Changes of adrenomedullin and natriuretic peptides in patients with adrenal medullary hyperplasia prior to and following pharmacological therapy and adrenalectomy