NDT Advance Access published online on November 14, 2006
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfl631
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1 Department of Renal Medicine, Aarhus University Hospital, Aarhus, Denmark; Clinical Institute, Aarhus University Hospital, Aarhus, Denmark
* To whom correspondence should be addressed. Background. We have previously demonstrated renal enlargement in pigs treated with ciclosporin A (CsA) 10 mg/kg/day orally for 6 months. The aim of the study was to investigate the effect of oral CsA (10 mg/kg/day) for 12 months on kidney structure and function and the potential renoprotective role of angiotensin II (Ang II) receptor blocker telmisartan on chronic CsA nephrotoxicity in pigs. Methods. Fourteen Göttingen minipigs aged 12-14 months were included: pigs received either CsA 10 mg/kg/day (n = 7) or CsA 10 mg/kg/day + telmisartan 40 mg/day (n = 7) orally for 12 months. At week 0, 12, 31, 38, 47 and 54, we measured body weight, mean arterial blood pressure (MAP), serum creatinine, whole blood trough CsA, plasma Ang II, haemoglobin and liver function parameters. Magnetic resonance imaging was used to estimate kidney length, volume, relative glomerular filtration rate (rGFR) and renal blood flow (RBF). Kidney tissue biopsies were used for conventional histological examination. Results. Plasma Ang II levels were significantly higher during telmisartan treatment. Interstitial fibrosis and glomerulosclerosis occurred in both groups, but were attenuated in the telmisartan-treated pigs (P = 0.064). A significant increase in renal volume was seen in both groups, but tended to be lower in the CsA + telmisartan pigs at 54 weeks (P = 0.097). Telmisartan did not reduce MAP, RBF or rGFR. Conclusions. Long-term CsA treatment causes histopathological changes in the porcine kidney similar to those observed in humans and results in renal enlargement. Telmisartan attenuates the CsA-induced histopathological changes and enlargement in the pig kidney.
Received June 9, 2006
Accepted September 29, 2006
Original Article
Telmisartan attenuates chronic ciclosporin A nephrotoxicity in a pig model
Donata Cibulskyte 1, Michael Pedersen 2, Arne Hørlyck 3, Niels Marcussen 4, Hans Erik Hansen 1, Jørgen Frøkiær 5, Melvin Madsen 1, and Jens Mortensen 6 *
2 MR Research Centre, Aarhus University Hospital, Aarhus, Denmark
3 Department of Radiology, Skejby Hospital, Aarhus University Hospital, Aarhus, Denmark
4 Department of Pathology, Aarhus University Hospital, Aarhus, Denmark
5 Clinical Institute, Aarhus University Hospital, Aarhus, Denmark; The Water and Salt Research Center, University of Aarhus, Aarhus, Denmark
6 Clinical Institute, Aarhus University Hospital, Aarhus, Denmark
Jens Mortensen, E-mail: jmo{at}dadlnet.dk
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