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Issue 4, 2011
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Proteomics analysis identifies PARK7 as an important player for renal cell resistance and survival under oxidative stress

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Abstract

Renal fibrosis is a process that is characterized by declining excretory renal function. The molecular mechanisms of fibrosis are not fully understood. Oxidative stress pathways were reported to be involved in renal tissue deterioration and fibrosis progression. In order to identify new molecular targets associated with oxidative stress and renal fibrosis, differential proteomics analysis was performed with established renal cell lines (TK173 and HK-2). The cells were treated with oxidative stress triggering factor H2O2 and the proteome alterations were investigated. Two dimensional protein maps were generated and differentially expressed proteins were processed and identified using mass spectrometry analysis combined with data base search. Interestingly the increase of ROS in the renal cell lines upon H2O2 treatment was accompanied by alteration of a large number of proteins, which could be classified in three categories: the first category grouped the proteins that have been described to be involved in fibrogenesis (e.g.ACTA2, VIN, VIM, DES, KRT, COL1A1, COL4A1), the second category, which was more interesting involved proteins of the oxidative stress pathway (PRDX1, PRDX2, PRDX6, SOD, PARK7, HYOU1), which were highly up-regulated under oxidative stress, and the third category represented proteins, which are involved in different other metabolic pathways. Among the oxidative stress proteins the up-regulation of PARK7 was accompanied by a shift in the pI as a result of oxidation. Knockdown of PARK7 using siRNA led to significant reduction in renal cell viability under oxidative stress. Under H2O2 treatment the PARK7 knockdown cells showed up to 80% decrease in cell viability and an increase in apoptosis compared to the controls. These results highlight for the first time the important role of PARK7 in oxidative stress resistance in renal cells.

Graphical abstract: Proteomics analysis identifies PARK7 as an important player for renal cell resistance and survival under oxidative stress

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Publication details

The article was received on 26 Jul 2010, accepted on 18 Jan 2011 and first published on 09 Feb 2011


Article type: Paper
DOI: 10.1039/C0MB00116C
Citation: Mol. BioSyst., 2011,7, 1277-1288
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    Proteomics analysis identifies PARK7 as an important player for renal cell resistance and survival under oxidative stress

    M. Eltoweissy, G. A. Müller, A. Bibi, P. Van Nguye, G. H. Dihazi, C. A. Müller and H. Dihazi, Mol. BioSyst., 2011, 7, 1277
    DOI: 10.1039/C0MB00116C

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