Inhibition of the TWEAK/Fn14 pathway attenuates renal disease in nephrotoxic serum nephritis.

Abstract

Previously it was shown that the TNF superfamily member TWEAK (TNFSF12) acts through its receptor, Fn14, to promote proinflammatory responses in kidney cells, including the production of MCP-1, RANTES, IP-10 and KC. In addition, the TWEAK/Fn14 pathway promotes mesangial cell proliferation, vascular cell activation, and renal cell death. To study the relevance of the TWEAK/Fn14 pathway in the pathogenesis of antibody-induced nephritis using the mouse model of nephrotoxic serum nephritis (NTN), we induced NTN by passive transfer of rabbit anti-glomerular antibodies into Fn14 knockout (KO) and wild type (WT) mice. Severe proteinuria as well as renal histopathology were induced in WT but not in Fn14 KO mice. Similarly, a pharmacologic approach of anti-TWEAK mAb administration into WT mice in the NTN model significantly ameliorated proteinuria and improved kidney histology. Anti-TWEAK treatment did not affect the generation of mouse anti-rabbit antibodies; however, within the kidney there was a significant decrease in glomerular immunoglobulin deposition, as well as macrophage infiltrates and tubulointerstitial fibrosis. The mechanism of action is most likely due to reductions in downstream targets of TWEAK/Fn14 signaling, including reduced renal expression of MCP-1, VCAM-1, IP-10, RANTES as well as Fn14 itself, and other molecular pathways associated with fibrosis in anti-TWEAK treated mice. Thus, TWEAK/Fn14 interactions are instrumental in the pathogenesis of nephritis in the NTN model, apparently mediating a cascade of pathologic events locally in the kidney rather than by impacting the systemic immune response. Disrupting TWEAK/Fn14 interactions may be an innovative kidney-protective approach for the treatment of lupus nephritis and other antibody-induced renal diseases.

• Authors: Yumin Xia, Sean R Campbell, Anna Broder, Leal Herlitz, Maria Abadi, Ping Wu, Jennifer S Michaelson, Linda C Burkly, Chaim Putterman
• Journal: Clinical immunology (Orlando, Fla.) (Clin Immunol) Vol. 145 Issue 2 Pg. 108-21 (Nov 2012) ISSN: 1521-7035 [Electronic] United States
• PMID: 22982296 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2012 Elsevier Inc. All rights reserved.

Chemical References

• Antibodies
• Biomarkers
• Cytokine TWEAK
• Immune Sera
• Receptors, Tumor Necrosis Factor
• TWEAK Receptor
• Tnfrsf12a protein, mouse
• Tnfsf12 protein, mouse
• Tumor Necrosis Factor Inhibitors
• Tumor Necrosis Factors

Topics

• Animals
• Antibodies (immunology, pharmacology, therapeutic use)
• Biomarkers (metabolism)
• Cytokine TWEAK
• Disease Models, Animal
• Fibrosis
• Gene Expression
• Glomerular Basement Membrane (immunology)
• Glomerulonephritis (immunology, pathology, therapy)
• Immune Sera
• Kidney (drug effects, immunology, pathology)
• Lupus Nephritis (immunology, pathology, therapy)
• Mesangial Cells (drug effects, immunology, pathology)
• Mice
• Mice, Knockout
• Rabbits
• Receptors, Tumor Necrosis Factor (deficiency, genetics, immunology)
• Signal Transduction
• TWEAK Receptor
• Tumor Necrosis Factor Inhibitors
• Tumor Necrosis Factors (genetics, immunology)