Abstract
Proteomics were performed using highly (99.99%) purified cytotrophoblasts from six normal and six pre-eclamptic placentas. Eleven proteins were found which decreased in pre-eclampsia (actin, glutathione S-transferase, peroxiredoxin 6, aldose reductase, heat shock protein 60 (Hsp60), two molecular forms of heat shock protein 70 (Hsp70) β-tubulin, subunit proteasome, ezrin, protein disulfide isomerase, and phosphoglycerate mutase 1). Only one protein, α-2-HS-glycoprotein (fetuin), was found to increase its expression. Western blots of actin, Hsp70, ezrin, and glutatione S-transferase confirmed decrease in protein expression. Many of the proteins that decreased are consistent with a state of oxidative stress in the pre-eclamptic placenta and a decreased cytotrophoblast defense against and response to oxidative stress.
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