Urinary CD20 mRNA as a surrogate of CD20-positive cells infiltration during allograft dysfunction in renal transplant patients

Urinary CD20 mRNA as a surrogate of CD20-positive cells infiltration during allograft dysfunction in renal transplant patients

Author Ponciano, Viviane C. Autor UNIFESP Google Scholar
Soares, Maria Fernanda Sanches Autor UNIFESP Google Scholar
Naka, Erika L. Autor UNIFESP Google Scholar
Arruda, Erika F. Autor UNIFESP Google Scholar
Cenedeze, Marcos A. Autor UNIFESP Google Scholar
Franco, Marcello F. Autor UNIFESP Google Scholar
Pacheco-Silva, Alvaro Autor UNIFESP Google Scholar
Camara, Niels O. S. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract B lymphocyte infiltration in renal acute allograft rejection has been associated with steroid resistance and poor outcomes. We aimed to measure CD20 mRNA in urine of renal transplant patients with graft dysfunction and correlate with the histological diagnosis and immunohistochemical (IH) staining for CD20. A total of 48 urine samples were analyzed (21 with acute rejection, 10 with chronic allograft nephropathy, 11 with unspecific tubular lesions, 3 with acute pyelonephritis and 3 with polyomavirus nephropathy), Higher urinary CD20 levels associated with a positive IH staining for CD20 (>50 positive cells/HPF) in renal tissue (p = 0.04), with a sensitivity of 83.3% and a specificity of 51.6%. Within the acute rejection group, a positive staining for CD20 was not associated with graft loss, steroid resistance or lack of return to basal creatinine after treatment, but was associated with higher serum creatinine at 3 and 6 months, I and 2 years after the acute episode (p < 0.05). in conclusion, we showed that urinary levels of CD20 detected by RT-PCR had a high sensitivity for CD20+ staining in the corresponding renal tissue, but with a low specificity. Patients with clusters of CD20+ cells > 50/HPF had higher serum creatinine after 2 years of follow up. (C) 2008 Elsevier B.V. All rights reserved.
Keywords B cells
Acute rejection
CD20
Renal transplant
Language English
Date 2009-06-01
Published in International Immunopharmacology. Amsterdam: Elsevier B.V., v. 9, n. 6, p. 663-667, 2009.
ISSN 1567-5769 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 663-667
Origin http://dx.doi.org/10.1016/j.intimp.2008.11.017
Access rights Closed access
Type Article
Web of Science ID WOS:000266568800004
URI http://repositorio.unifesp.br/handle/11600/31565

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