title: Quantitative proteomic (iTRAQ) analysis of 1st trimester maternal plasma samples in pregnancies at risk for preeclampsia.
abstract: A current major obstacle is that no reliable screening markers exist to detect pregnancies at risk for preeclampsia. Quantitative proteomic analysis employing isobaric labelling (iTRAQ) has been suggested to be suitable for the detection of potential plasma biomarkers, a feature we recently verified in analysis of pregnancies with Down syndrome foetuses. We have now examined whether this approach could yield biomarkers to screen pregnancies at risk for preeclampsia. In our study, we used maternal plasma samples obtained at 12 weeks of gestation, six from women who subsequently developed preeclampsia and six with uncomplicated deliveries. In our analysis, we observed elevations in 10 proteins out of 64 proteins in the preeclampsia study group when compared to the healthy control group. These proteins included clusterin, fibrinogen, fibronectin, and angiotensinogen, increased levels of which are known to be associated with preeclampsia. An elevation in the immune-modulatory molecule, galectin 3 binding protein, was also noted. Our pilot study, therefore, indicates that quantitative proteomic iTRAQ analysis could be a useful tool for the detection of new preeclampsia screening markers.
authors.affiliation: Department of Biomedicine, University Women's Hospital, 4031 Basel, Switzerland.
authors.forename: Varaprasad
authors.initials: V
authors.lastname: Kolla
authors.forename: Paul
authors.initials: P
authors.lastname: Jenö
authors.forename: Suzette
authors.initials: S
authors.lastname: Moes
authors.forename: Olav
authors.initials: O
authors.lastname: Lapaire
authors.forename: Irene
authors.initials: I
authors.lastname: Hoesli
authors.forename: Sinuhe
authors.initials: S
authors.lastname: Hahn
mesh_terms: D030562:Databases, Protein; D005260:Female; D006801:Humans; D010446:Peptide Fragments / Q000097:blood; D011225:Pre-Eclampsia / Q000097:blood* / Q000378:metabolism; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000097:blood*; D011296:Prenatal Diagnosis / Q000379:methods*; D020543:Proteome / Q000378:metabolism; D040901:Proteomics / Q000379:methods; D012189:Retrospective Studies; D053719:Tandem Mass Spectrometry
chemical_list: D010446:Peptide Fragments; D020543:Proteome