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Type: Journal article
Title: Dietary fish oil prevents the development of renal damage in salt-loaded stroke-prone spontaneously hypertensive rats
Author: Hobbs, L.
Rayner, T.
Howe, P.
Citation: Clinical and Experimental Pharmacology and Physiology, 1996; 23(6-7):508-513
Publisher: WILEY
Issue Date: 1996
ISSN: 0305-1870
Abstract: 1. Stroke-prone spontaneously hypertensive rats (SHRSP) fed a high salt diet rapidly develop proteinuria, a marker of renal damage. We have recently shown that supplementing the diet of these rats with pure omega-3 fatty acids can inhibit the development of proteinuria. The aim of the present study was to examine the underlying renal pathology and to see whether a similar benefit could be obtained with fish oil or canola oil. 2. Diets containing sodium (2% by weight) and 5% fish oil, canola oil, olive oil or safflower oil (the latter two serving as controls) were fed to groups of eight young SHRSP and the development of hypertension and proteinuria was monitored. After 9 weeks, rats were killed and their kidneys were taken for histological examination and fatty acid analysis. Urinary protein was characterized electrophoretically. 3. Patterns of protein excretion were consistent with the appearance of pathological changes in both glomeruli and tubules. Fish oil inhibited the elevation of blood pressure, prevented the development of proteinuria and minimized histological lesions. However, in rats fed canola oil, hypertension and renal damage were equally severe as in rats fed olive or safflower oil. 4. The prevention of hypertensive renal damage by dietary fish oil may be attributable to the increased incorporation of long-chain omega-3 fatty acids in the kidney.
Keywords: Kidney; Animals; Rats, Inbred SHR; Rats; Cerebrovascular Disorders; Kidney Diseases; Proteinuria; Hypertension; Sodium Chloride; Dietary Fats, Unsaturated; Fatty Acids; Fatty Acids, Monounsaturated; Fish Oils; Plant Oils; Electrophoresis, Polyacrylamide Gel; Diet; Male; Olive Oil; Rapeseed Oil
RMID: 0030004124
DOI: 10.1111/j.1440-1681.1996.tb02770.x
Appears in Collections:Physiology publications

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