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      The transforming growth factor beta system in kidney disease and repair: recent progress and future directions :

      Current Opinion in Nephrology and Hypertension

      Ovid Technologies (Wolters Kluwer Health)

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          Transforming growth factor beta in tissue fibrosis.

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            Natural inhibitor of transforming growth factor-beta protects against scarring in experimental kidney disease.

            The central pathological feature of human kidney disease that leads to kidney failure is the accumulation of extracellular matrix in glomeruli. Overexpression of transforming growth factor-beta (TGF-beta) underlies the accumulation of pathological matrix in experimental glomerulonephritis. Administration of an antibody raised against TGF-beta to glomerulonephritic rats suppresses glomerular matrix production and prevents matrix accumulation in the injured glomeruli. One of the matrix components induced by TGF-beta, the proteoglycan decorin, can bind TGF-beta and neutralize its biological activity, so decorin may be a natural regulator of TGF-beta (refs 3, 4). We tested whether decorin could antagonize the action of TGF-beta in vivo using the experimental glomerulonephritis model. We report here that administration of decorin inhibits the increased production of extracellular matrix and attenuates manifestations of disease, confirming our hypothesis. On the basis of our results, decorin may eventually prove to be clinically useful in diseases associated with overproduction of TGF-beta.
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              Suppression of experimental glomerulonephritis by antiserum against transforming growth factor beta 1.

              Glomerulonephritis is an inflammation of the kidney characterized by the accumulation of extracellular matrix within the damaged glomeruli, impaired filtration and proteinuria. In its progressive form, the disease destroys kidney function leading to uraemia and death, unless dialysis therapy or kidney transplantation is available. The pathogenesis of glomerulonephritis is incompletely understood, but the eliciting factor is thought often to be an immunological injury to mesangial and/or other resident cells in the glomeruli. We have used an animal model of acute mesangial proliferative glomerulonephritis to show that this disease is associated with increased production and activity of transforming growth factor beta 1 (TGF-beta 1), an inducer of extracellular matrix production. Here we report that administration of anti-TGF-beta 1 at the time of induction of the glomerular disease suppresses the increased production of extracellular matrix and dramatically attenuates histological manifestations of the disease. These results provide direct evidence for a causal role of TGF-beta 1 in the pathogenesis of the experimental disease and suggest a new approach to the therapy of glomerulonephritis.
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                Author and article information

                Journal
                Current Opinion in Nephrology and Hypertension
                Current Opinion in Nephrology and Hypertension
                Ovid Technologies (Wolters Kluwer Health)
                1062-4821
                1999
                January 1999
                : 8
                : 1
                : 21-30
                Article
                10.1097/00041552-199901000-00005
                © 1999

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