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Abstract Title:

Late dietary intervention limits benefits of soy protein or flax oil in experimental polycystic kidney disease.

Abstract Source:

Nephron Exp Nephrol. 2007;106(4):e122-8. Epub 2007 Jun 29. PMID: 17622740

Abstract Author(s):

Deepa Sankaran, Neda Bankovic-Calic, Leah Cahill, Claudia Yu-Chen Peng, Malcolm R Ogborn, Harold M Aukema

Abstract:

BACKGROUND/AIMS: Dietary soy protein and flax oil retard kidney disease progression when initiated in the early stages of disease in several experimental models, including the Han:SPRD-cy rat. However, individuals with kidney disease often do not become aware of their condition until injury to the kidney is extensive. The objective of this study was to determine whether initiating these interventions in established disease would alter further progression of renal injury. METHODS: Two-month-old adult male Han:SPRD-cy rats were given either a flax oil diet (7% flax oil), a soy protein diet (20% soy protein) or a control diet (7% corn oil, 20% casein) for 4 months. Renal disease progression was assessed by examining morphological, immunohistochemical and biochemical parameters. RESULTS: Compared to controls, there was 21-24% less staining of proliferating cells, 21-24% less oxidative damage and 13-15% less renal inflammation in kidneys from rats given dietary soy protein and flax oil. Renal cystic growth and fibrosis and serum creatinine levels were not altered by these dietary treatments. CONCLUSIONS: Late intervention with dietary soy protein and flax oil reduces some disease-associated pathologies in established renal disease in Han:SPRD-cy rats. The potential benefits of the antioxidant and anti-inflammatory effects on ultimate renal disease outcome in the long term remains to be determined.

Study Type : Animal Study

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Sayer Ji
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