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- W2093433243 abstract "Replacement of calcineurin inhibitor (CI) with anti-metabolic agents in transplant patients with CI-induced nephrotoxicity is performed clinically and improves renal function, but increases the risk of rejection. We investigated whether the change from cyclosporine (CsA) to a limited dose of mycophenolic acid (MPA) together with a new sphingosine-1-phosphate (S1P) receptor agonist, KRP-203, is sufficient to prevent both transplant vasculopathy and CsA-induced nephrotoxicity.Orthotopic aortic transplantation was conducted in a high-responder rat combination of Dark Agouti (DA; major histocompatibility complex [MHC] haplotype RT-1a) to Lewis (RT-1(l)). After CsA administration (15 mg/kg/day) for 2 weeks, the recipients were divided into the following treatment groups for 6 weeks: MPA (10 mg/kg); KRP-203 (KRP; 1 mg/kg); and MPA + KRP. Serum creatinine (Cr), arteriolar hyalinosis and expression of transforming growth factor (TGF)-beta1 in the recipient kidney were examined as parameters indicating nephrotoxicity. Intimal hyperplasia was assessed by vascular occlusion, and graft-infiltrated cells were semi-quantitatively evaluated histologically and then characterized immunohistochemically.Continuous CsA treatment attenuated intimal hyperplasia and cell infiltration (2.9 +/- 0.3% and 0.4 +/- 0.1; p < 0.01 vs vehicle), but increased Cr and hyalinosis (0.43 +/- 0.03 mg/dl and 57.2 +/- 0.4%; p < 0.01) with upregulated TGF-beta1. Replacement of CsA by MPA or KRP treatment alone improved nephrotoxicity, but worsened intimal hyperplasia and cell infiltration. Conversion to MPA + KRP treatment prevented nephrotoxicity (Cr, 0.32 +/- 0.02 mg/dl; hyalinosis, 5.6 +/- 1.3%; p < 0.01 vs CsA) and markedly suppressed intimal hyperplasia and cell infiltration (3.6 +/- 1.2% and 1.0 +/- 0.3; p = not significant vs CsA), with reduced T-cell infiltrates in the graft.Changing from CsA to a combined therapy of MMF with S1P agonist is a promising strategy in clinical transplantation to overcome CI-induced nephrotoxicity and chronic rejection." @default.
- W2093433243 created "2016-06-24" @default.
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- W2093433243 date "2006-07-01" @default.
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- W2093433243 title "Change From Cyclosporine to Combination Therapy of Mycophenolic Acid With the New Sphingosine-1-phosphate Receptor Agonist, KRP-203, Prevents Host Nephrotoxicity and Transplant Vasculopathy in Rats" @default.
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- W2093433243 doi "https://doi.org/10.1016/j.healun.2006.03.014" @default.
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