alexa Proteome differences of placenta between pre-eclampsia and normal pregnancy.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Proteomics & Bioinformatics

Author(s): GharesiFard B, Zolghadri J, KamaliSarvestani E

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Abstract Placenta is a tissue unique to pregnancy and despite its major role in pregnancy, little is known about the proteome changes within placenta during pregnancy-related diseases such as pre-eclampsia (PE). Therefore, the aim of this study is the analysis of proteome differences between pre-eclamptic and normal full-term placentas. To achieve this goal, five normal and five severe pre-eclamptic placentas were included in this study. Total placental proteins were extracted and subjected to two-dimensional polyacrylamide gel electrophoresis (2D-PAGE). After staining, the gels were scanned and the protein spots were analysed using Image Master 2D Platinum Software. Non-parametric Mann-Whitney test was used for analysis of the mean intensity differences of the spots between normal and pre-eclamptic placentas. Statistical analysis indicated that 17 spots were differently expressed in pre-eclamptic compared with normal placentas (p<0.05). Using Matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI TOF/TOF) mass analysis, 11 out of 17 spots were identified. Among them, four proteins (chloride intracellular channel 3, apolipoprotein A-I, transthyretin (TTR) and protein disulphide isomerase) were up-regulated while seven (peroxiredoxin 2, peroxiredoxin 3, Hsc 70, Cu/Zn-superoxide dismutase (SOD-1), actin gamma 1 propeptide, chain A of enoyl-coenzyme A hydratase and HSP gp96) showed decreased expression in PE in comparison with normal placentas. In conclusion, down-regulation of proteins with anti-oxidant activities (peroxiredoxin 2 and peroxiredoxin 3) and altered expression of stress-response proteins (Hsc 70, Hsp gp96 and protein disulphide isomerase) might play an important role in the pathogenesis of PE. 2009 Elsevier Ltd. All rights reserved. This article was published in Placenta and referenced in Journal of Proteomics & Bioinformatics

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