Search results for "LDOS"

THE “SALT-TASTING” NEWBORN

2021

Pseudohypoaldosteronism type 1 (PHA1) is a rare genetic disease due to the peripheral resistance to aldosterone. Clinical spectrum with neonatal onset includes salt loss, hyponatremia, hypochloraemia, hyperkalaemia, metabolic acidosis and increased plasmatic levels of aldosterone. Two forms of the disease - renal and systemic – have been described, which are genetically distinct and with wide clinical expressivity. The most severe generalized PHA1 is caused by mutations in the genes encoding for the subunits of the epithelial sodium channels (ENaC). The paper reports the case of a newborn of the first pregnancy of healthy and consanguineous Sicilian parents, with a clinical and hormonal pic…

Renaldos de Montalbán

1564

Sig. a10, b-o8, A-M8, N6 Falta la port. del Libro Primero (substituïda per la port. d'una altra ed. pegada en 1 fol.), tít. pres de la port. del Libro Segundo. - El traductor és Luis Domínguez Grav. xil. en les port. - Capitals grav Portades a dos tintes. - Lletra gòtica. - Text a dos col. - Reclams al final de cada quadern. - Errates de fol

Memorie di uno smemorato ed altri scritti

2020

CORRELAZIONE TRA ALDOSTERONE E PARATORMONE PLASMATICI NELL’IPERTENSIONE ARTERIOSA ESSENZIALE

2013

Studi sperimentali e clinici hanno indotto ad ipotizzare una interazione fisiopatologica tra aldosterone (PAC) e paratormone (PTH) nello sviluppo dell’ipertensione arteriosa e delle alterazioni cardiovascolari . Scopo di questo studio è stato di valutare il rapporto tra PAC e PTH nell’ipertensione essenziale (EH) e le eventuali interazioni con FGF23, proteina modulatrice della secrezione di PTH. In 105 H ed in 50 controlli sani sono stati analizzati i livelli plasmatici di PAC, PTH, FGF23 Vitamina D. L’analisi di correlazione multipla condotta considerando PAC come variabile dipendente ha mostrato una correlazione di PAC con FGF23 (β = 0.337; p = 0.0021) e con PTH (β = 0.241; p = 0.039) ind…

Effects of anti-aldosteronic agents in resistant hypertension

2011

Hypertension is defined resistant (or refractory) when it is not possible to reach the target values of blood pressure despite the contemporary use of three antihypertensive drugs at optimised dosage (1). Today difficult control of hypertension is more and more frequent in clinical practice. In recent years the role of anti-aldosteronic agents has appeared useful in the treatment of resistant hypertension; this condition seems to be related to the increase of the mean age. Subjects suffering from resistant hypertension mostly show an isolated high systolic pressure. In addition to advanced age, factors commonly associated are: increased levels of aldosterone and intravascular volume, chroni…

Within-patient reproducibility of the aldosterone: renin ratio in primary aldosteronism.

2010

The plasma aldosterone concentration:renin ratio (ARR) is widely used for the screening of primary aldosteronism, but its reproducibility is unknown. We, therefore, investigated the within-patient reproducibility of the ARR in a prospective multicenter study of consecutive hypertensive patients referred to specialized centers for hypertension in Italy. After the patients were carefully prepared from the pharmacological standpoint, the ARR was determined at baseline in 1136 patients and repeated after, on average, 4 weeks in the patients who had initially an ARR > or =40 and in 1 of every 4 of those with an ARR <40. The reproducibility of the ARR was assessed with Passing and Bablok and Demi…

Central obesity and hypertension: Pathophysiologic role of renal haemodynamics and function

1995

OBJECTIVE: To investigate the role of alterations in renal haemodynamics and function and in plasma renin activity on obesity-induced hypertension. DESIGN: Renal haemodynamics and function, salt-regulating hormones and structural cardiac parameters were evaluated in 20 lean normotensives and in 64 obese subjects with central or peripheral fat distribution, 43 of them were normotensives and 21 of them were hypertensives. Obesity and central fat distribution were defined according to sex-specific 85th percentile respectively of Body Mass Index (BMI) and Waist to Hip Ratio (WHR). MEASUREMENTS: Serum immunoreactive insulin (IRI), plasma renin activity (PRA), plasma aldosterone (PA), microalbumi…

Acylated Preatroxigenin Glycosides from Atroxima congolana

2003

Six new acylated bisdesmosidic preatroxigenin saponins named atroximasaponins E1, E2 (1, 2), F1, F2 (3, 4), and G1, G2 (5, 6) were isolated as three inseparable mixtures of the trans- and cis-p-methoxycinnamoyl derivatives, from the roots of Atroxima congolana. Their structures were established through extensive NMR spectroscopic analysis as 3-O-beta-D-glucopyranosylpreatroxigenin-28-O-beta-D-xylopyranosyl-(1--4)-alpha-L-rhamnopyranosyl-(1--2)-[beta-D-glucopyranosyl-(1--3)]-[4-O-trans-p-methoxycinnamoyl]-beta-D-fucopyranoside (atroximasaponin E1, 1), and its cis-isomer, atroximasaponin E2 (2), 3-O-beta-D-glucopyranosylpreatroxigenin-28-O-beta-D-xylopyranosyl-(1--4)-alpha-L-rhamnopyranosyl-(…

Stereoselective synthesis and determination of the cytotoxic properties of spicigerolide and three of its stereoisomers.

2003

Stereoselective syntheses of the naturally occurring, cytotoxic lactone spicigerolide and three nonnatural stereoisomers thereof are described. The commercially available sugar l-rhamnose was in all cases the chiral starting material. Key steps in each of these syntheses were asymmetric Brown allylations and ring-closing metatheses. The cytotoxic activities of the four lactones against a range of tumoral lines were then determined.

Chromatographic and mass spectrometric characteristics of 20-dihydroaldosterone.

1992

The 20 alpha-reduced derivative of aldosterone, 20 alpha-dihydroaldosterone, was needed as reference compound in order to continue the studies on 18-hydroxylation in the Y-1 adrenal cell line. It was obtained by reduction of aldosterone with sodium borohydride. Analysis of the products of the reaction as methoxime trimethylsilyl (MO-TMS) derivatives by gas chromatography (GC) and GC-mass spectrometry (GC-MS) showed three possible forms of the compound. Their identification was confirmed by comparison with the products obtained by stereospecific reduction of aldosterone using 3 alpha,20 beta-hydroxysteroid dehydrogenase. Chromatographic behavior and mass spectra are given for the three forms…