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  • Title: Two-dimensional difference gel electrophoresis urinary proteomic profile in the search of nonimmune chronic allograft dysfunction biomarkers.
    Author: Bañón-Maneus E, Diekmann F, Carrascal M, Quintana LF, Moya-Rull D, Bescós M, Ramírez-Bajo MJ, Rovira J, Gutierrez-Dalmau A, Solé-González A, Abián J, Campistol JM.
    Journal: Transplantation; 2010 Mar 15; 89(5):548-58. PubMed ID: 20134395.
    Abstract:
    INTRODUCTION: Despite advances in therapeutics, graft loss associated with chronic allograft dysfunction (CAD) remains high. Urinary proteomic analysis is a noninvasive method that could be used to detect and evaluate CAD in renal transplant recipients. This study was aimed to establish the normal proteome map of stable transplant patients and to validate the utility of two-dimensional difference gel electrophoresis (2DE-DIGE) in identifying new candidates as urinary biomarkers of CAD. METHODS: Morning spot urine samples that were collected from kidney transplant recipients with biopsy-proven interstitial fibrosis and tubular atrophy (IFTA) stages 0-I-II/III (n=8/group) under immunosuppressive treatment with tacrolimus plus mycophenolate with or without prednisone. 2DE silver staining and mass spectrometry analyses were used to establish the normal proteome map, and 2DE-DIGE and mass spectrometry were used to identify proteins exhibiting differential abundance. RESULTS AND CONCLUSIONS: This study defines the normal proteome of stable renal transplant patients, which is composed of several plasma proteins, as well as of immunologic proteins that are probably specific to transplant recipients. The 2DE-DIGE study showed 19 proteins with differential concentrations, depending on the IFTA histologic score. These 19 proteins could be used as urinary biomarkers of the severity of IFTA in renal transplant recipients.
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