Diastolic heart failure (HF) accounts for up to 50% of all HF admissions, with hypertension being the major cause of diastolic HF. Hypertension is characterized by left ventricular (LV) hypertrophy (LVH). Proinflammatory cytokines are increased in LVH and hypertension, but it is unknown if they mediate the progression of hypertension-induced diastolic HF. We sought to determine if interferon-γ ...

Several studies have shown an inverse relation between blood pressure and plasma aldosterone levels. Since blood pressure is in part genetically regulated, we looked for evidence that genetic factors might also affect aldosterone production. The nocturnal urinary excretion rate was used to estimate aldosterone production, and electrolyte excretion rates were used to estimate sodium and potassiu...

Very small amounts of adrenocorticosteroids are synthesized by brain tissue in vitro. While there is evidence suggesting that the synthesis of aldosterone in the brain may have a role in the hypertension of the Dahl salt-sensitive rat, the de novo synthesis of aldosterone or corticosterone within the brain of a living animal has not been demonstrated. We have used sensitive ELISAs to measure al...

In the spontaneous hypertensive rat, overexpression of the renal Na-independent L-amino acid transporter LAT2 is organ specific, precedes the onset of hypertension, correlates negatively with plasma aldosterone, and parallels the enhanced ability to take up L-DOPA and form renal dopamine. The present study evaluated the role of aldosterone on transcript and protein abundance of Na-independent a...

Aldosterone metabolism has been shown to be altered in pregnancy. The increased conversion of intravenously administered aldosterone-(3)H to the acid-labile conjugate in the urine (aldosterone 18-glucuronide) has again been observed. The urinary yield of intravenously administered aldosterone-(3)H as aldosterone 18-glucuronide in 16 pregnant subjects of 13.4+/-0.9 (SE)% was significantly higher...

OBJECTIVE Primary aldosteronism (PA) is associated with inappropriate left ventricular hypertrophy (LVH) in relation to a given gender and body size. There is no ideal parameter to predict the presence of LVH or inappropriate LVH in patients with PA. We investigate the performance of 24-hour urinary aldosterone level, plasma renin activity and aldosterone-to-renin ratio on this task. METHODS ...

19-Nor-deoxycorticosterone (19-nor-DOC), a hypertensinogenic mineralocorticoid, equipotent with aldosterone and independent of the renin-angiotensin system, is synthesized in the kidney and excreted in excess in the urine of patients with aldosterone-producing adenomas. This current study evaluated the adrenal and renal venous levels of aldosterone and 19-nor-DOC after adrenal and renal venous ...

Although aldosterone influences a variety of cellular processes through nongenomic mechanisms, the significance of nongenomic pathways for aldosterone-induced regulation of epithelial function is not understood. Recently, we demonstrated that aldosterone inhibits transepithelial HCO(3)(-) absorption in the medullary thick ascending limb (MTAL) through a nongenomic pathway. This inhibition is me...

To the Editor: Baudrand et al reported that statin use was associated with lower plasma aldosterone levels and urinary aldosterone excretion in nonrandomized studies of hypertensive and diabetic subjects, both in the basal state and during stimulation by angiotensin II infusion or by a low sodium diet. They also reported that 10 μmol/L statins, a concentration that far exceeds peak plasma stati...

• It has been proposed that the kidney provides one of the primary mechanisms for the regulation of aldosterone secretion *• and this control appears to be mediated by the reninangiotensin system. The effects of nephrectomy upon aldosterone secretion,' "• the demonstration of aldosterone-stimulating activity and pressor activity in the same ammonium sulfate fraction of kidney extracts, the corr...