[Differentially expressed urine protein of contrast induced acute kidney injury by two-dimensional differential in-gel electrophoresis and mass spectrometry].

Objective: To explore the differentially expressed proteins of contrast-induced nephropathy through a comparison of urinary proteome so as to further elucidate the pathogenesis and discover the disease biomarker.
Methods: The urine samples of 12 patients were collected before and after coronary angiography. Two dimensional electrophoresis was performed after the urine samples were labeled by different dyes. The differences of urine proteome were analyzed by Decyder software and the differentially expressed spots identified by mass spectrometry.
Results: A total of 56 differentially expressed spots were detected. Among them, 39 spots were up-regulated and 17 spots down-regulated. And mannose binding lectin and mannose binding lectin associated serine protease 2, key proteins in complement body activation, were both significantly up-regulated.
Conclusion: Urine proteomic study methods are constructed based on 2D-DIGE and mass spectrometry. The lectin pathway of complement body may be associated with contrast-induced acute kidney injury.