Chronic renal denervation prevents glomerular hyperfiltration in diabetic rats
Background. The increase in glomerular filtration rate (GFR) induced by amino acid infusion is attenuated in rats with chronic renal denervation. The aim of the present study was to investigate whether renal denervation abrogates glomerular hyperfiltration occurring in the early state of diabetes me...
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Published in | Nephrology, dialysis, transplantation Vol. 19; no. 2; pp. 342 - 347 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Oxford University Press
01.02.2004
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Subjects | |
Online Access | Get full text |
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Summary: | Background. The increase in glomerular filtration rate (GFR) induced by amino acid infusion is attenuated in rats with chronic renal denervation. The aim of the present study was to investigate whether renal denervation abrogates glomerular hyperfiltration occurring in the early state of diabetes mellitus. Methods. Sprague–Dawley rats were subjected to bilateral renal denervation before induction of diabetes mellitus (DM) by streptozotocin. Clearance experiments were performed 2 weeks after onset of moderate DM. Glomerular volume was estimated following paraformaldehyde fixation in rat kidney slices from measurement of cross-sectional area of Bowman's capsule. Results. GFR in non-diabetic rats with intact nerves (CON-INN) was 0.82±0.03 ml·min–1·100 g–1 body weight. Diabetic animals with innervated kidneys presented a significant glomerular hyperfiltration (1.13±0.03 ml·min–1·100 g–1 body weight), while renal denervation in diabetic rats lowered GFR towards levels of CON-INN (0.88±0.03 ml·min–1·100 g–1 body weight). Estimated glomerular volume amounted to 0.69±0.03·106 μm3 in the CON-INN group and was significantly higher in diabetic animals with intact renal nerves (0.86±0.04·106 μm3). Interestingly, renal denervation prevented the glomerular enlargement due to DM. Conclusions. Renal nerves appear to be significantly involved in the mediation of glomerular hyperfiltration in experimental DM. If the kidney is prevented from sympathetic nerve stimulation, structural changes due to early diabetic nephropathy, i.e. glomerular enlargement, are abolished. |
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Bibliography: | local:gfg584 ark:/67375/HXZ-DN3L05GF-T Correspondence and offprint requests to: Dr G. Luippold, Department of Pharmacology and Toxicology, Faculty of Medicine, University of Tübingen, Wilhelmstrasse 56, D-72074 Tübingen, Germany. Email: gerd.luippold@uni-tuebingen.de istex:24237E0AC17FE7A0D88D809E1A4E0BD2150274A2 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0931-0509 1460-2385 1460-2385 |
DOI: | 10.1093/ndt/gfg584 |