[Nephrogenic systemic fibrosis and use of MR contrast media].

Background: Nephrogenic systemic fibrosis (NSF) is a new and probably iatrogenic disorder. It was first described time in 2000 and associated with the use of gadolinium containing MR contrast media in patients with impaired renal function in 2006.

Material And Method: We describe a case of NSF identified at Haukeland University Hospital and give a brief overview of the disease, based on literature retrieved from a non-systematic search.

Glomerular charge barrier and development of proteinuria in passive Heymann nephritis.

Background/aim: Passive Heymann nephritis (PHN) in rats is a commonly used model of membranous glomerulonephritis in man where the cause of proteinuria is not fully resolved. This study was designed to investigate the role of the glomerular charge barrier in development of PHN proteinuria.

Methods: We studied female Sprague-Dawley rats (n = 33) at days 0, 2, 5 and 14 after induction of PHN by injection of antiserum against renal tubular epithelial antigens (anti-Fx1A).

Age-dependent regulation of vasopressin V1a receptors in preglomerular vessels from the spontaneously hypertensive rat.

Experiments were performed to get insight into the role of AVP receptor V(1a) regulation with age, i.e., during development and maintenance of high blood pressure.

Glomerular charge selectivity is impaired in hypertensive nephropathy.

Background: In hypertensive nephropathy the morphological changes and albuminuria seem to start in the inner cortex but the mechanism of proteinuria is unknown. We tested the hypothesis of reduced glomerular charge selectivity in the juxtamedullary cortex of old spontaneously hypertensive rats (SHR) as a cause of proteinuria in rats with hypertensive nephropathy.

Methods: The glomerular charge barrier was evaluated in 80-week-old SHR and age-matched normotensive Wistar-Kyoto rats (WKY) by measuring the glomerular clearance of radiolabelled cationic and anionic chymotrypsinogen (Chym and aChym, MW 25,000) accumulated by the proximal tubular cells in the outer, middle and inner cortex following intravenous injection.

Renal hemodynamics during development of hypertension in young spontaneously hypertensive rats.

Background/aims: Cross-transplantation studies between animals with genetic hypertension and normotensive animals indicate a key role of the kidney in development of hypertension, and studies in young spontaneously hypertensive rats (SHR) have shown reduced glomerular filtration rate (GFR) and renal blood flow (RBF) for a short period at the age of 4-6 weeks during blood pressure increase. We tested the hypothesis that a decline in GFR during development of hypertension in SHR might be more pronounced in juxtamedullary cortex than other cortical zones.

Methods: By use of the aprotinin method, total and zonal cortical GFR was measured in anaesthetized Wistar-Kyoto (WKY) rats and SHR at the ages of 2, 4, 6, 8 and 10 weeks.