BackgroundInflammatory cell infiltration and residual areas of fibrosis in kidneys after renal transplantation can lead to functional abnormalities with long-term implications.ObjectivesThe aim of this study was to determine urinary monocyte chemoattractant protein-1 (uMCP-1) levels, relative cortical interstitial area (RCIA), and cortical tubulointerstitial macrophage infiltration in renal transplant patients with delayed graft function (DGF) and their possible correlation with graft outcome.DesignPatients were followed after biopsies for one year, and their renal function and structure were evaluated, as well as parameters of inflammatory process.SettingClinical Hospital of the School of Medicine of Ribeirão Preto.PatientsTwenty-two cadaveric kidney transplant recipients with DGF were followed for one year.MeasurementsRenal function, RCIA, macrophages infiltration and uMCP-1 levels were evaluated.MethodsRenal function was evaluated by plasma creatinine levels. RCIA was determined by morphometry. Immunohistochemical staining of macrophages was performed using an anti-CD68 monoclonal antibody. uMCP-1 levels were determined using a human MCP-1/CCL2 immunoassay kit.ResultsThere was a significant increase in uMCP-1 levels in transplant patients compared with controls (p < 0.001). RCIA was 7.1% (6.4 to 9.2; median and 25th to 75th percentiles) in controls and 37.1% (28.1 to 43.7) in patients with kidney transplants (p < 0.001). The patients who presented with a higher RCIA in the first biopsy showed higher levels of plasma creatinine one year after transplantation (r = 0.44; p < 0.05). The number of tubulointerstitial macrophages per 0.10 mm2 grid field was higher in the renal cortex of transplant patients compared with the controls (19.4 (9.0 to 47.1) vs. 2.5 (1.8 to 3.4), p < 0.001). There was also a positive correlation between the RCIA and the number of tubulointerstitial macrophages in the renal cortex of these patients (r = 0.49; p < 0.001).LimitationsThe number of patients studied was relatively small and may not be reflecting outcomes over a larger spectrum of kidney cadaveric transplants.ConclusionsOur results demonstrate increased levels of uMCP-1 in transplant patients with DGF, in addition to increased tubulointerstitial macrophage infiltration and RCIA, which could predict the outcome of renal function in these patients.
No presente trabalho estudou-se a fisiologia urinária de pacientes com Doença de Chagas nas suas diversas formas. Grupo A (controle) com 21 indivíduos normais; Gupo B: 16 pacientes com sorologia positiva; Grupo C: com 16 pacientes com cardiopatia chagásica e Grupo D: 21 pacientes com esofagopatia e/ou megacolon chagásicos. Os resultados mostraram que não houve diferenças significantes (p > 0,05) entre os 4 grupos estudados para os parâmetros: capacidade cistométrica, pressão de micção e fluxo urinário. Entretanto, houve diferenças significantes (p < 0,05) para os parâmetros: pressão abdominal, pressão do detrusor, pressão uretral e tempo de micção na análise comparativa entre o grupo D e o controle A. Esses achados sugerem que a Doença de Chagas, em sua forma digestiva, também pode comprometer o trato urinário baixo, alterando sua fisiologia.
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