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Prediction of renal allograft rejection by urinary protein analysis using ProteinChip Arrays (surface-enhanced laser desorption/ionization time-of-flight mass spectrometry).

Abstract：

OBJECTIVES:To develop a noninvasive method for the detection of renal transplant rejection using ProteinChip Arrays (surface-enhanced laser desorption/ionization time-of-flight mass spectrometry). METHODS:A total of 23 urine samples were collected from 13 patients showing biopsy-proven renal allograft rejection and from 10 patients without histologic signs of rejection. All 23 patients had clinical symptoms and signs of acute allograft rejection and underwent renal biopsy. Samples were centrifuged, and supernatants were directly spotted onto the ProteinChip arrays with different chromatographic surfaces. The obtained spectra in a range from 2 to 200 kDa were subjected to bioinformatic analysis using the method of Fuzzy c-means, followed by the establishment of rule bases and evaluation using the relevance index according to Kiendl. RESULTS:Several protein peaks were identified allowing differentiation between rejection and no rejection. Using two different ProteinChip surfaces, we found two biomarkers at 25.71 kDa and 28.13 kDa that gave a diagnostic sensitivity of 90% and 93% and a specificity of 80% (SAX2) and 85% (CM10), respectively. CONCLUSIONS:Surface-enhanced laser desorption/ionization time-of-flight mass spectrometry appears to be a promising new diagnostic tool for distinguishing renal transplant patients with no rejection from those with acute rejection.

journal_name

Urology

journal_title

Urology

authors

Reichelt O,Müller J,von Eggeling F,Driesch D,Wunderlich H,Schubert J,Gröne HJ,Stein G,Ott U,Junker K

doi

10.1016/j.urology.2005.09.038

subject

Has Abstract

pub_date

2006-03-01 00:00:00

pages

472-5

issue

3

eissn

0090-4295

issn

1527-9995

pii

S0090-4295(05)01393-2

journal_volume

67

pub_type

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