Abstract | BACKGROUND/AIMS: METHODS: Studies were conducted using a transgenic model, the diabetic (mRen-2)27 rat, which develops many of the structural and functional characteristics of human diabetic nephropathy when diabetes is induced with streptozotocin (STZ). An experimental design was chosen to mimic, in part, the clinical context with drug therapy ( tranilast 400 mg/kg/ day) initiated in established disease (8 weeks after STZ) and in the presence of persistent hyperglycaemia and hypertension. RESULTS: At 16 weeks, diabetes was associated with progressive albuminuria, tubulointerstitial fibrosis and tubular atrophy. Without affecting blood pressure or blood glucose, tranilast treatment was associated with a 83% reduction in tubulointerstitial fibrosis (p < 0.001), a 58% reduction in tubular atrophy (p < 0.01) and near normalization of albuminuria (p < 0.05) in diabetic Ren-2 rats. In vitro studies in primary cultures of human renal cortical fibroblasts demonstrated a reduction in TGF-beta-induced hydroxyproline incorporation and fibronectin synthesis with tranilast 100 microM. CONCLUSION:
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Authors | Sally Mifsud, Darren J Kelly, Weier Qi, Yuan Zhang, Carol A Pollock, Jennifer L Wilkinson-Berka, Richard E Gilbert |
Journal | Nephron. Physiology
(Nephron Physiol)
Vol. 95
Issue 4
Pg. p83-91
( 2003)
ISSN: 1660-2137 [Electronic] Switzerland |
PMID | 14694265
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright 2003 S. Karger AG, Basel |
Chemical References |
- Anti-Inflammatory Agents, Non-Steroidal
- Collagen Type IV
- Fibronectins
- Ren2 protein, mouse
- Transforming Growth Factor beta
- ortho-Aminobenzoates
- Tritium
- Proline
- Renin
- tranilast
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Topics |
- Albuminuria
(etiology, prevention & control)
- Animals
- Animals, Genetically Modified
- Anti-Inflammatory Agents, Non-Steroidal
(pharmacology, therapeutic use)
- Atrophy
- Blotting, Western
- Cells, Cultured
- Collagen Type IV
(analysis)
- Diabetes Mellitus, Experimental
(complications, genetics)
- Diabetic Nephropathies
(etiology, genetics, prevention & control)
- Female
- Fibroblasts
(cytology, drug effects, metabolism)
- Fibronectins
(metabolism)
- Fibrosis
- Humans
- Immunohistochemistry
- Kidney
(drug effects, metabolism, pathology)
- Mice
- Proline
(metabolism)
- Random Allocation
- Rats
- Rats, Sprague-Dawley
- Renin
(genetics)
- Time Factors
- Transforming Growth Factor beta
(pharmacology)
- Tritium
- ortho-Aminobenzoates
(pharmacology, therapeutic use)
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