Abstract

FACIO, María Laura et al. Follow-up of urine protein profile in renal transplant. Acta bioquím. clín. latinoam. [online]. 2010, vol.44, n.4, pp.653-660. ISSN 0325-2957.

Post-transplant chronic nephropathy is characterized by interstitial fibrosis and tubular atrophy. These alterations are non-specific, but the glomerular and vascular lesions help to differentiate the etiological causes. The aim of this study was to determine the qualitative follow-up study of urine proteins in patients, six years after receiving a renal transplant, and compare their relationship to laboratory parameters and renal biopsy. The evolution of 17 patients with renal transplant was studied for one year, through serum creatinine, proteinuria, and polyacrylamide gel electrophoresis in the presence of sodium dodecylsulfate (SDS-PAGE) in one and two dimensions with silver staining. The patients with chronic nephropathy by renal biopsy presented a tubular profile of urinary proteins, and those who presented glomerulopathy showed a predominant glomerular profile. Changes in the tubular profiles during the follow-up study were associated to urinary tract, pulmonary, and intestinal infections, as well as borderline rejection, even without evident changes in either proteinuria or serum creatinine. The bidimensional electrophoresis clearly marked the orosomucoid proteins and zinc alpha-2 glycoprotein, generally associated to arterial hyalinosis due to ciclosporin toxicity. Even with traces of proteinuria, SDS-PAGE with silver staining made it possible to identify the renal lesion location. It also enabled the detection of the stable profiles of urinary proteins and changes in the evolution, without modification of serum creatinine. SDS-PAGE in one and two dimensions is used as a complement in the evaluation of renal transplant patients' clinical condition.

Keywords : Renal transplant; Chronic nephropathy; Polyacrylamide gel electrophoresis; Cyclosporine; Arterial hyalinosis.

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