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Journal of Renin-Angiotensin-Aldosterone System
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What's this?

Nephrectomy and peritoneal dialysis eliminates circulating renin and controls uraemia in the rat

Trine Fischer Pedersen

Neurobiology Research Unit, Rigshospitalet, Copenhagen University Hospital

Arne Høj Nielsen

Department of Nephrology, Herlev Hospital, Copenhagen, Denmark

Svend Strandgaard

Department of Nephrology, Herlev Hospital, Copenhagen, Denmark

Olaf B Paulson

Neurobiology Research Unit, Rigshospitalet, Copenhagen University Hospital, paulson{at}nru.dk

Objective

The aim of the present study was to develop a rat model for in vivo studies of the local effects of the renin-angiotensin system (RAS) following elimination of circulating renin.

Methods

Sprague Dawley rats were bilaterally nephrectomised and had a peritoneal dialysis catheter implanted. The rats were maintained on dialysis continuously for 48 hours, using Dianeal PD4 3.86% glucose dialysis solution. The peritoneal catheter and an automated system for dialysate exchange were made in our laboratory. A sham nephrectomised control group of rats was also dialysed.

Results

Nephrectomised and sham-operated rats remained active and in good general condition during peritoneal dialysis. At 48 hours, in nephrectomised, dialysed rats, peritoneal urea clearance was 4.14±0.52 ml/hour, plasma urea was 40.0±7.7 mmol/L, plasma creatinine was 0.423±0.070 mmol/L and plasma renin was below the limit of detection.

Conclusions

In conclusion, it was possible to sustain bilaterally-nephrectomised rats on continuous peritoneal dialysis for 48 hours, pending elimination of renin from the circulation. The nephrectomised dialysed rat model should be useful for investigation of the physiological effects of the circulating versus the local RAS.

Key Words: peritoneal dialysis • rat • the renin-angiotensin system

Journal of Renin-Angiotensin-Aldosterone System, Vol. 3, No. 2, 130-134 (2002)
DOI: 10.3317/jraas.2002.015
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[Abstract] [Full Text] [PDF]


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