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Title: Long-term effects of vitamin C supplementation on glomerular changes in streptozotocin-induced diabetic rats
Authors: Mariem Yusuksawad
Sirima Thongruay
Supang Maneesri le Grand
Narongsak Chaiyabutr
Other author: Chulalongkorn University. Faculty of Medicine
Chulalongkorn University. Faculty of Medicine
Chulalongkorn University. Faculty of Medicine
Chulalongkorn University. Faculty of Veterinary Science
Subjects: Vitamin C
Issue Date: 2007
Publisher: Chulalongkorn University
Citation: Asian biomedicine : research, reviews and news. 1,3(October 2007) : 279-287
Abstract: Objective: To investigate long-term effects of AA supplementation on glomerular changes in streptozotocin (STZ)-induced diabetic rats. Methods: Diabetes was induced in Sprague-Dawley rats (180-220 g) by injection of STZ (55 mg/kg bw, iv). The rats were divided into controls (CON), AA-supplemented controls (CON-AA), diabetic (STZ) and AAsupplemented diabetic rats (STZ-AA). AA (1 g/L) was continuously supplemented to the rats for 4, 8, 16 and 24 weeks. The glomerular filtration rate (GFR), effective renal plasma flow (ERPF), renal vascular resistance (RVR) malondialdehyde (MDA) and transforming growth factor-β1 (TGF-β1) levels were measured in the renal cortex. Glomerular morphology was examined histologically. Renal hypertrophic index was calculated using kidney-tobody weight ratio (KW/BW). Results: Decreases in GFR and ERPF were ameliorated at week 16 and deteriorated at week 24 after AA supplementation in STZ-AA rats. High blood glucose concentration was attenuated only at week 16. MAD and TGF-β1 levels in renal cortex decreased significantly in STZ-AA rats at week 16 but not at week 24. The number of abnormal glomeruli and KW/BW decreased significantly at week 16 in STZ-AA rats. Conclusion: Long-term supplementation of AA may ameliorate the glomerular changes induced by diabetes.
ISSN: 1905-7415
Type: Article
Appears in Collections:Med - Journal Articles

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