Activation of Intrarenal Complement System in Mouse Model for Chronic Cyclosporine Nephrotoxicity.
10.3349/ymj.2007.48.3.517
- Author:
Young Ok KIM
1
;
Sun Woo LIM
;
Can LI
;
Hee Jung KANG
;
Kyung Ohk AHN
;
Hyun Joo YANG
;
Jung Yeon GHEE
;
Su hyun KIM
;
Jin Young KIM
;
Bum Soon CHOI
;
Jin KIM
;
Chul Woo YANG
Author Information
1. Xenotransplantation Center, Division of Nephrology, Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea. angch@catholic.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Cyclosporine;
complement;
nephrotoxicity;
innate immunity
- MeSH:
Animals;
Antigens, CD45/analysis;
Antigens, CD46/analysis;
Antigens, CD55/analysis;
Complement C3/analysis;
Complement C4b/analysis;
Complement Membrane Attack Complex/analysis;
Complement System Proteins/*analysis;
Cyclosporine/*toxicity;
Disease Models, Animal;
Immunity, Innate/drug effects;
Immunoblotting;
Immunohistochemistry;
Immunosuppressive Agents/toxicity;
Kidney/*drug effects/immunology/pathology;
Kidney Diseases/*chemically induced/immunology;
Mice;
Microscopy, Confocal;
Peptide Fragments/analysis
- From:Yonsei Medical Journal
2007;48(3):517-525
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Local activation of the complement system plays a role in target organ damage. The aim of our study was to investigate the influence of cyclosporine (CsA)- induced renal injury on the complement system in the kidney. MATERIALS AND METHODS: Mice fed a low salt (0.01%) diet were treated with vehicle (VH, olive oil, 1mL/kg/day) or CsA (30mg/kg/day) for one or four weeks. Induction of chronic CsA nephrotoxicity was evaluated with renal function and histomorphology. Activation of the complement system was assessed through analysis of the expression of C3, C4d, and membrane attack complex (MAC), and the regulatory proteins, CD46 and CD55. CsA treatment induced renal dysfunction and typical morphology (tubulointerstitial inflammation and fibrosis) at four weeks. RESULTS: CsA-induced renal injury was associated with increased the expression of C3, C4d, and MAC (C9 and upregulation of complement regulatory proteins (CD 46 and CD55). Immunohistochemistry revealed that the activated complement components were mainly confined to the injured tubulointerstitium. CONCLUSION: CsA-induced renal injury is associated with activation of the intrarenal complement system.
