Spleen tyrosine kinase contributes to acute renal allograft rejection in the rat
| Autor: | Frank Y. Ma, Sharmila Ramessur Chandran, William R. Mulley, John Kanellis, Kate Blease, Naomi Woodman, Greg H. Tesch, Yingjie Han, David J. Nikolic-Paterson |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Graft Rejection
Pathology medicine.medical_specialty Time Factors medicine.medical_treatment T-Lymphocytes Syk chemical and pharmacologic phenomena Biology Kidney Peritubular capillaries Pathology and Forensic Medicine Rats Sprague-Dawley medicine Animals Syk Kinase Rats Wistar Molecular Biology Protein Kinase Inhibitors Acute tubular necrosis Chemotaxis Macrophages Intracellular Signaling Peptides and Proteins Cell Biology Immunotherapy Original Articles Protein-Tyrosine Kinases medicine.disease Allografts Kidney Transplantation Transplantation Disease Models Animal medicine.anatomical_structure Immunology Acute Disease Infiltration (medical) Immunostaining Signal Transduction |
| Popis: | Kidney allografts induce strong T-cell and antibody responses which mediate acute rejection. Spleen tyrosine kinase (Syk) is expressed by most leucocytes, except mature T cells, and is involved in intracellular signalling following activation of the Fcγ-receptor, B-cell receptor and some integrins. A role for Syk signalling has been established in antibody-dependent native kidney disease, but little is known of Syk in acute renal allograft rejection. Sprague-Dawley rats underwent bilateral nephrectomy and received an orthotopic Wistar renal allograft. Recipient rats were treated with a Syk inhibitor (CC0482417, 30 mg/kg/bid), or vehicle, from 1 h before surgery until being killed 5 days later. Vehicle-treated recipients developed severe allograft failure with marked histologic damage in association with dense leucocyte infiltration (T cells, macrophages, neutrophils and NK cells) and deposition of IgM, IgG and C3. Immunostaining identified Syk expression by many infiltrating leucocytes. CC0482417 treatment significantly improved allograft function and reduced histologic damage, although allograft injury was still clearly evident. CC0482417 failed to prevent T-cell infiltration and activation within the allograft. However, CC0482417 significantly attenuated acute tubular necrosis, infiltration of macrophages and neutrophils and thrombosis of peritubular capillaries. In conclusion, this study identifies a role for Syk in acute renal allograft rejection. Syk inhibition may be a useful addition to T-cell-based immunotherapy in renal transplantation. |
| Databáze: | OpenAIRE |
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