PMID: 18706245Aug 19, 2008Paper

Intrarenal activation of renin angiotensin system in the development of cyclosporine A induced chronic nephrotoxicity

Chinese Medical Journal
Ming-hua ShangZheng Zhang

Abstract

The relationship between cyclosporine-induced chronic nephrotoxicity (CAN) and renin-angiotensin II in humans is still contradictory. This study was conducted to detect the levels of renin and angiotensin II (ANGII) both in renal tissue and plasma from kidney transplantation patients suffering from CAN. Twenty-six patients with allograft biopsy-proven CsA-related chronic nephrotoxicity (CAN group) and chronic rejection (control group) were enrolled in this study. Renal tissues were subjected to immunohistochemical staining with renin and ANGII antibodies. Renin and ANGII plasma levels were measured when the biopsy was performed. The relationship between expression of renin or ANGII and clinicopathological manifestations were also investigated. The cyclosporine plasma level was obtained 2 hours after morning dose (C2). In vitro, human umbilical vein endothelial cells (HUVEC) and rat mesangial cells (MC) were incubated with different concentrations of CsA (0, 250, 500, 1000 microg/L) for 24 hours. Secretion and expression of renin and ANGII was measured by radioimmunoassay or immunohistochemical staining. Renal pathological scores for renin and ANGII expression were significantly higher in specimens of CAN than in controls (P < 0...Continue Reading

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