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Am J Physiol Renal Physiol 297: F769-F780, 2009. First published June 17, 2009; doi:10.1152/ajprenal.90530.2008
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Role of FTY720 on M1 and M2 macrophages, lymphocytes, and chemokines in Formula nephrectomized rats

Matthias Schaier,1 Stefanie Vorwalder,1 Claudia Sommerer,1 Ralf Dikow,1 Friederike Hug,1 Marie-Luise Gross,2 Rüdiger Waldherr,2 and Martin Zeier1

Departments of 1Nephrology and 2Pathology, University of Heidelberg, Heidelberg, Germany

Submitted 7 September 2008 ; accepted in final form 17 June 2009

Renal injury is accompanied by the presence of infiltrating inflammatory cells in the glomerulus and tubulointerstitium. FTY720 modifies lymphocyte migration into injured tissues by lymphocyte sequestration to secondary lymphoid organs. The purpose of this study was to examine the potential of FTY720 to influence the inflammatory response in a nonimmunological model of renal failure. Sham-operated and Formula nephrectomized (SNX) Sprague-Dawley rats received two different doses of FTY720 or vehicle orally for 14 wk. Treatment with FTY720 reduced glomerular and tubulointerstitial damage in SNX rats but failed to stabilize creatinine clearance. The increase in gene expression of chemokine receptors CCR1, CCR2, and CCR5 in kidneys of vehicle-treated SNX rats was significantly attenuated by high-dose FTY720. Treatment with high-dose FTY720 tended to normalize RANTES and MCP-1 renal gene expression. FTY720 affected not only glomerular and tubulointerstitial lymphocytes, but M1 and M2 phenotype macrophages were also reduced. FTY720 significantly reduced key mediators of renal inflammation and fibrosis. FTY720 also decreased immunoregulation of M2 macrophages, which are beneficial for tissue remodeling and repair.

inflammatory cell filtration


Address for reprint requests and other correspondence: M. Schaier, Dept. of Nephrology, Univ. of Heidelberg, Im Neuenheimer Feld 162, 69120 Heidelberg, Germany (e-mail: matthias_schaier{at}med.uni-heidelberg.de)






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