Aquaporin-1 and aquaporin-2 urinary excretion in cirrhosis: Relationship with ascites and hepatorenal syndrome
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چکیده
منابع مشابه
Altered urinary excretion of aquaporin 2 in IgA nephropathy.
OBJECTIVE The intrarenal renin-angiotensin system (RAS) activation plays a pivotal role in immunoglobulin A nephropathy (IgAN) pathogenesis, which is still largely undefined. Recently, vasopressin (AVP) has been advocated to contribute to the genesis and progression of chronic kidney diseases (CKD) directly, and indirectly, via RAS activation. Our aim is to explore the intrarenal activity of AV...
متن کاملUrinary excretion of aquaporin-2 water channel protein in human and rat.
Previous studies by the authors demonstrated that the response of urinary aquaporin-2 (AQP2) excretion to dDAVP (deamino-8-D-arginine vasopressin) infusion is an index of vasopressin action on the kidney (N Engl J Med 332: 1540-1545, 1995). In the study presented here, the characteristics of urinary excretion of AQP2 were examined further. An RIA suitable for AQP2 in the urine was established. ...
متن کاملSelective V2-receptor vasopressin antagonism decreases urinary aquaporin-2 excretion in patients with chronic heart failure.
Aquaporin-2 (AQP-2), a water channel located on the apical membrane of collecting duct cells, regulates water reabsorption under the control of vasopressin (AVP). Using an antibody directed to human AQP-2, a quantitative Western blot analysis was performed to determine the collecting duct responsiveness to an oral, nonpeptide, V2 receptor antagonist (VPA-985) in patients with chronic NYHA II an...
متن کاملEffect of high and low sodium intake on urinary aquaporin-2 excretion in healthy humans.
The degree of water transport via aquaporin-2 (AQP2) water channels in renal collecting duct principal cells is reflected by the level of the urinary excretion of AQP2 (u-AQP2). In rats, the AQP2 expression varies with sodium intake. In humans, the effect of sodium intake on u-AQP2 and the underlying mechanisms have not previously been studied. We measured the effect of 4 days of high sodium (H...
متن کاملAntidiuretic action of oxytocin is associated with increased urinary excretion of aquaporin-2.
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...
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ژورنال
عنوان ژورنال: Hepatology
سال: 2006
ISSN: 0270-9139,1527-3350
DOI: 10.1002/hep.21414