PMID: 9525702Apr 3, 1998Paper

Link between angiotensin II and TGF-beta in the kidney

Mineral and Electrolyte Metabolism
G Wolf

Abstract

Glomerulosclerosis and tubulointerstitial fibrosis are common morphological correlates of many end-stage kidneys. There is ample evidence that transforming growth factor-beta (TGF-beta) plays a major role in these alterations by directly stimulating synthesis of many extracellular matrix components and reducing collagenase production, finally leading to renal scarring. Although many factors may induce TGF-beta expression in the kidney, one very interesting aspect is the link between angiotensin II (ANG II) and TGF-beta. Originating from observations in vascular smooth muscle cells, there are now several additional studies showing that ANG II stimulates TGF-beta expression in the kidney. Although cell culture studies have convincingly demonstrated that the vasoactive peptide directly stimulates transcription as well as bioactivation of TGF-beta, the in vivo evidence is more indirect. Nevertheless, there are several pathophysiological situations including unilateral ureteral obstruction, chronic cyclosporin A nephrotoxicity, various models of hypertension, and probably diabetic nephropathy in which ANG II-mediated TGF-beta induction has been demonstrated to play an important role in the progression of the disease. The fascinating...Continue Reading

Citations

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