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  • Title: Targeted Mass Spectrometry-Based Proteomics Method to Quantify Placental Extracellular Vesicles.
    Author: Lai A, Palma C, Salas A, Carrion F, Salomon C.
    Journal: Methods Mol Biol; 2022; 2504():79-89. PubMed ID: 35467280.
    Abstract:
    Extracellular vesicles (EVs) carry a wide range of molecules, such as proteins, RNAs, and DNA. EVs are secreted from a wide range of cells, including placental cells. Interestingly, EVs secreted from placental cells have been identified in maternal circulation as early as 6 weeks of gestation, and their concentration increases with the gestational age. While there is growing interest in elucidating the role of exosomes during normal and complicated pregnancies, progress in the field has been delayed because of the inability to quantify placental EVs from the maternal circulation. Recent reports have demonstrated the presence of placental-type alkaline phosphatase (PLAP) EVs only in the blood of pregnant women, indicating that PLAP is a marker to identify EVs secreted from the placenta. Therefore, here we describe a workflow to quantify placental EVs from maternal circulation using a targeted proteomics approach based on selecting specific peptides identified in the PLAP protein.
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