Detergent-Insoluble Proteome Analysis Revealed Aberrantly Aggregated Proteins in Human Preeclampsia Placentas
datasetposted on 2017-10-01, 00:00 authored by Wanling Zhang, Xing Chen, Ziqi Yan, Yang Chen, Yizhi Cui, Bingjun Chen, Chujun Huang, Weiwen Zhang, Xingfeng Yin, Qing-Yu He, Fang He, Tong Wang
Preeclampsia (PE) is a placenta disease, featured by hypertension, proteinuria, and other multiorgan dysfunctions, and its etiology is unclear. We and others have shown that intensive endoplasmic reticulum (ER) stress and unfolded protein response (UPR) occur in the PE placenta. In this study, we isolated detergent-insoluble proteins (DIPs) from human placenta tissues, which were enriched with protein aggregates, to characterize the placenta UPR in PE. With data-independent acquisition (DIA) mass spectrometry, we identified 2066 DIPs across all normal (n = 10) and PE (n = 10) placenta samples, among which 110 and 108 DIPs were significantly up- and down-regulated in PE, respectively. Per clustering analysis, differential DIPs could generally distinguish PE from normal placentas. We verified the MS quantitation of endoglin and vimentin by immunoblotting. In addition, we observed that PE placenta tissues have remarkably more endoglin in the cytoplasm. Furthermore, we found that DIPs were evenly distributed across different chromosomes and could be enriched in diversified gene ontology terms, while differential DIPs avoided to distribute on X-chromosome. Significantly up-regulated DIPs in PE were focused on the top functions of lipid metabolism, while 23 of these DIPs could form the top network regulating cellular movement, development, growth, and proliferation. Our results implicate that human PE placentas have disease-relevant differential DIPs, which reflect aberrantly aggregated proteins of placental tissues. The mass spectrometry proteomics data have been deposited to ProteomeXchange consortium with the data set identifier PXD006654, and iProX database (accession number: IPX0000948000).
Read the peer-reviewed publication
up-regulated DIPsmultiorgan dysfunctionsplacenta UPRdata-independent acquisitiondetergent-insoluble proteinsIPXmass spectrometryprotein responseDetergent-Insoluble Proteome Analysis Revealed Aberrantly Aggregated Proteinsaccession numberPE placentasPE placentaERmass spectrometry proteomics dataHuman Preeclampsia Placentas Preeclampsiaplacenta diseaselipid metabolismendoplasmic reticulum2066 DIPsprotein aggregates108 DIPsplacental tissuesiProX databasePE placenta tissuesDIAgene ontology termsplacenta tissuesPXDMS quantitationProteomeXchange consortiumaggregated proteins