1. The relations between the concentration of plasma uric acid and urinary excretion of aldosterone, sodium and potassium, were studied in ten healthy males on a diet containing 160 mmol of sodium and 90 mmol of potassium per day. 2. Plasma uric acid correlated positively with aldosterone excretion and this correlation was statistically independent of sodium and potassium excretion. 3. Plasma u...

This study investigated the relationship between urinary protein excretion in lupus nephritis New Zealand black mice and renal pathology. A total of 328 lupus nephritis New Zealand black mice were established by a backcross hybridization method, and renal pathology was determined. The urinary protein excretion of the backcross mice over 24 h was compared and analyzed. Urinary protein excretion ...

A preliminary report of the data was presented at the Southem Section Meeting of The American Federation for Clinical Research in New Orleans, La. in January 1976. Received for publication 1 May 1978 and in revised form 5 October 1979. tion vs. race and age-matched normal subjects. Stimulation of urinary kallikrein excretion by Florinef was equal in black and white normal subjects vs. hypertens...

AIMS To evaluate the variability of 24-hour urinary iodine (UI) excretion intra- and interindividually on three days of a week in healthy subjects, living in southern Brazil, and the correlation among the urinary excretion of iodine and sodium. METHODS Cross-sectional study, including 47 volunteers: 18 individuals with one, 15 individuals with two and 14 individuals with three 24-hour urine s...

Urinary kallikrein excretion was measured in 21 healthy subjects and 44 patients with various types of hypertension. The kallikrein activity was determined by the method of esterolytic assay. The excretion rates in normal subjects were 112.9 +/- 11.1 (S.E.) EU/day. The kallikrein excretion was decreased in patients with essential hypertension, the mean estimated values were 75.2 +/- 10.0 EU/day...

Unravelling chronic hypokalaemia can be a clinical challenge in some patients. History and physical examination can be misleading or inaccurate. Diagnostic steps usually involve assessing urinary potassium excretion, transtubular potassium gradient (TTKG) and concomitant acid–base disturbances. In those patients with low urinary potassium excretion, a gastrointestinal cause for the hypokalaemia...

BACKGROUND The antidiuretic effect of oxytocin in humans is controversial. Urinary excretion of aquaporin-2 (AQP2) can be used as an index of the action of vasopressin on the kidney. We investigated whether exogenous oxytocin affects urinary concentration and urinary AQP2 excretion in human beings. METHODS Oxytocin was administered intravenously at a rate of 20 mU/min in 10 healthy volunteers...

Idiopathic hypercalciuria (IH) is characterized by the excess excretion of calcium, despite normal levels calcium in blood and no apparent cause. In recent years, this metabolic disorder become more common to diagnose children can cause various urinary symptoms.