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pubmed-article:8780166pubmed:abstractTextDiabetic nephropathy is associated with thickening of the glomerular basement membrane and, in particular, with mesangial matrix expansion. Previous studies have indicated that administration of chemically modified, low-anticoagulant heparins prevents some of the morphologic and physiologic alterations occurring in experimental diabetic nephropathy. The effect of prolonged heparin treatment on the glomerular expression and deposition of alpha 1 (IV) collagen, which is a major component of the mesangial matrix, has not been reported previously. Four groups of rats were studied for 12 months: two control groups and two groups of streptozotocin-diabetic rats. One group in each branch received modified heparin continuously from the induction of diabetes. After 12 months synthesis and deposition of alpha 1 (IV) collagglomerula and adjacent tubuli were determined by nonradioactive in situ hybridization and immunohistochemistry. Mesangial cells were localized by Thy 1.1 staining. Long-term diabetes caused a significant increase in alpha 1 (IV) collagen deposition in the mesangial matrix and a more than 2-fold enhancement of glomerular cell alpha 1 (IV) collagen transcript levels, mainly in mesangial cells. The alpha 1 (IV) collagen mRNA levels of proximal tubular cells and visceral epithelial cells were similarly increased. Chronic treatment of diabetic rats with modified heparin completely prevented the increased alpha 1 (IV) collagen deposition and expression. The increased glomerular deposition of alpha 1 (IV) collagen observed in long-term streptozotocin diabetic rats appears to depend on an increased alpha 1 (IV) collagen synthesis. Because chronic application of low-anticoagulant heparin completely prevents the increased alpha 1 (IV) collagen synthesis by mesangial cells, this result suggests a new therapeutic option for the prevention of diabetic nephropathy in humans.lld:pubmed
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pubmed-article:8780166pubmed:articleTitleIncreased glomerular alpha 1 (IV) collagen expression and deposition in long-term diabetic rats is prevented by chronic glycosaminoglycan treatment.lld:pubmed
pubmed-article:8780166pubmed:affiliationDepartment of Nephrology, University of Padua, Italy.lld:pubmed
pubmed-article:8780166pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8780166pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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