Thus, suPAR may modify clinical course of NS as one of exacerbation factors. WONG MAY, YW1, SAAD SONIA1, ZHANG JIE1, BAY 57-1293 JAROLIMEK WOLFGANG2, SCHILTER HEIDI2, CHEN JASON3, GILL ANTHONY3, POLLOCK CAROL1, WONG MUH GEOT1 1Kolling Institute, Department of Medicine, Royal North Shore Hospital and University of Sydney, St Leonards, Sydney, New South Wales 2065, Australia; 2Pharmaxis Ltd, Frenchs Forest, Sydney, New South Wales 2086, Australia; 3Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, Sydney, New

South Wales 2065, Australia Introduction: Novel anti-inflammatory agents targeting the early cellular responses to injury are increasingly recognised to mitigate kidney fibrosis. Semicarbazide-sensitive amine oxidase (SSAO) is an enzyme known for its dual function in mediating inflammation through leukocyte transmigration and reactive oxygen species production. However, the role of SSAO inhibitors in limiting kidney fibrosis is unclear. We Doxorubicin aimed to determine the effectiveness of a SSAO inhibitor (PXS-4728A) as an antifibrotic agent using a 7-day unilateral ureteric obstruction (UUO) model of acute kidney fibrosis in 6–8 week old mice. Methods: The

experimental groups were: (i) Sham operated; (ii) UUO; (iii) UUO + SSAOi (2 mg/kg); (iv) UUO + Telmisartan, an angiotensin receptor blocker (3 mg/kg); and (v) UUO + SSAOi + Telmisartan. Kidney tissue was analysed for histological evidence of tubulointerstitial fibrosis as well as mRNA expression of markers associated with fibrosis and inflammation. Results: Our results show that extracellular matrix markers, namely fibronectin and collagen IV protein expression, were lower in mice subjected to UUO and treated with the SSAOi compared to untreated UUO mice. This was consistent with the observed attenuated mRNA

expression of collagen-IV and fibronectin. SSAOi also effectively inhibited transforming growth factor-beta1 (TGF-β1) and monocyte chemoattractant protein – 1 (MCP-1) expression to a similar extent Reverse transcriptase to that observed with Telmisartan. Individually, SSAOi and Telmistartan both induced a reduction in interstitial leukocyte and macrophage accumulation. However, the combination of SSAOi and Telmisartan was more effective at reducing inflammatory cell infiltration. Conclusion: These results demonstrate that SSAO inhibition can significantly suppress profibrotic and proinflammatory cytokine secretion and limit inflammatory cell accumulation and extracellular matrix expression in an acute model of renal fibrosis. KOMATSU SHINTARO1, AOKI TAKAFUMI1, TOMIDA HIDETAKA1, HISHIDA MANABU1, MORINAGA TAKATOSHI1, TAMAI HIROFUMI1, MATSUO SEIICHI2 1Department of Nephrology, Anjo Kosei Hospital; 2Department of Nephrology, Nagoya University Graduate School of Medicine Collagenofibrotic glomerulopathy is a rare glomerular disease characterized by extensive accumulation of atypical type III collagen fibers within the mesangial matrix and subendothelial space.