Proteomic profile of serum of pregnant women carring a fetus with Down syndrome using nano uplc Q-tof ms/ms technology

• Published in: The journal of maternal-fetal & neonatal medicine Vol. 31; no. 11; p. 1483
• Main Authors: López Uriarte, Graciela Arelí, Burciaga Flores, Carlos Horacio, Torres de la Cruz, Víctor Manuel, Medina Aguado, María Magdalena, Gómez Puente, Viviana Maricela, Romero Gutiérrez, Liliana Nayeli, Martínez de Villarreal, Laura Elia
• Format: Journal Article
• Language: English
• Published: England 03.06.2018
• Subjects: aneuploidy; Prenatal diagnosis; proteomics; trisomy 21
• ISSN: 1476-4954
• DOI: 10.1080/14767058.2017.1319923

Prenatal diagnosis of Down syndrome (DS) is based on the calculated risk of maternal age, biochemical and ultrasonographic markers and recently by cfDNA. Differences in proteomic profiles may give an opportunity to find new biomarkers. Characterize proteome of serum of mothers carrying DS fetus. Blood serum samples of three groups of women were obtained, (a) 10 non-pregnant, (b) 10 pregnant with healthy fetus by ultrasound evaluation, (c) nine pregnant with DS fetus. Sample preparation was as follows: Albumin/IgG depletion, desalting, and trypsin digestion; the process was performed in nanoUPLC MS/MS. Data analysis was made with Mass Lynx 4.1 and ProteinLynx Global Server 3.0, peptide and protein recognition by MASCOT algorithm and UNIPROT-Swissprot database. Each group showed different protein profiles. Some proteins were shared between groups. Only sera from pregnant women showed proteins related to immune and clot pathways. Mothers with DS fetus had 42 specific proteins. We found a different serum protein profile in mothers carrying DS fetuses that do not reflect expression of genes in the extra chromosome. Further studies will be necessary to establish the role of these proteins in aneuploid fetus and analyze their possible use as potential biomarkers.