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Published on: August 2, 2017
Proteome differences of placenta between pre-eclampsia and normal pregnancy.
B Gharesi-Fard1, J Zolghadri, E Kamali-Sarvestani
1Department of Immunology, Shiraz University of Medical Sciences, Shiraz, Iran.
Placenta
|December 4, 2009
Summary
Proteomic analysis reveals distinct protein expression in pre-eclamptic placentas compared to normal ones. Key proteins involved in antioxidant activity and stress response were found to be altered, suggesting their role in pre-eclampsia pathogenesis.
Area of Science:
- Obstetrics and Gynecology
- Proteomics
- Molecular Biology
Background:
- The placenta plays a critical role in pregnancy, but its proteomic changes in pregnancy-related diseases like pre-eclampsia (PE) are poorly understood.
- Pre-eclampsia is a serious condition affecting pregnant individuals, necessitating research into its underlying molecular mechanisms.
Purpose of the Study:
- To investigate and identify proteome differences between placentas from normal pregnancies and those affected by severe pre-eclampsia.
- To elucidate the potential role of altered protein expression in the pathogenesis of pre-eclampsia.
Main Methods:
- Proteins were extracted from five normal and five severe pre-eclamptic full-term placentas.
- Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) was employed for protein separation and analysis.
- Matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI TOF/TOF) was used to identify differentially expressed protein spots.
Main Results:
- Statistical analysis revealed 17 protein spots with significantly different expression levels between normal and pre-eclamptic placentas (p<0.05).
- Mass spectrometry identified 11 of these spots, with four proteins (chloride intracellular channel 3, apolipoprotein A-I, transthyretin, protein disulphide isomerase) showing increased expression in PE.
- Seven proteins, including peroxiredoxin 2, peroxiredoxin 3, Hsc 70, Cu/Zn-superoxide dismutase (SOD-1), actin gamma 1 propeptide, enoyl-coenzyme A hydratase, and HSP gp96, exhibited decreased expression in PE placentas.
Conclusions:
- Down-regulation of antioxidant proteins (peroxiredoxin 2 and 3) and altered expression of stress-response proteins (Hsc 70, Hsp gp96, protein disulphide isomerase) may contribute to the pathogenesis of pre-eclampsia.
- These proteomic findings provide insights into the molecular mechanisms underlying pre-eclampsia and suggest potential targets for future research.
