2026-06-14T03:46:49Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/168682024-11-28T19:01:47Zcom_20.500.12105_15322com_20.500.12105_2051com_20.500.12105_2052col_20.500.12105_16963col_20.500.12105_19617

00925njm 22002777a 4500 dc Montero-Calle, Ana Maria author Garranzo-Asensio, Maria author Rejas-González, Raquel author Feliu, Jaime author Mendiola, Marta author Peláez-García, Alberto author Barderas Manchado, Rodrigo author 2023-10-24 The proteome characterization of complex, deteriorated, or cross-linked protein mixtures as paired clinical FFPE or exosome samples isolated from low plasma volumes (250 µL) might be a challenge. In this work, we aimed at investigating the benefits of FAIMS technology coupled to the Orbitrap Exploris 480 mass spectrometer for the TMT quantitative proteomics analyses of these complex samples in comparison to the analysis of protein extracts from cells, frozen tissue, and exosomes isolated from large volume plasma samples (3 mL). TMT experiments were performed using a two-hour gradient LC-MS/MS with or without FAIMS and two compensation voltages (CV = -45 and CV = -60). In the TMT experiments of cells, frozen tissue, or exosomes isolated from large plasma volumes (3 mL) with FAIMS, a limited increase in the number of identified and quantified proteins accompanied by a decrease in the number of peptides identified and quantified was observed. However, we demonstrated here a noticeable improvement (>100%) in the number of peptide and protein identifications and quantifications for the plasma exosomes isolated from low plasma volumes (250 µL) and FFPE tissue samples in TMT experiments with FAIMS in comparison to the LC-MS/MS analysis without FAIMS. Our results highlight the potential of mass spectrometry analyses with FAIMS to increase the depth into the proteome of complex samples derived from deteriorated, cross-linked samples and/or those where the material was scarce, such as FFPE and plasma-derived exosomes from low plasma volumes (250 µL), which might aid in the characterization of their proteome and proteoforms and in the identification of dysregulated proteins that could be used as biomarkers. Proteomes. 2023 Oct 24;11(4):35. 10.3390/proteomes11040035 2227-7382 Proteomes 37987315 http://hdl.handle.net/20.500.12105/16868 FAIMS FFPE tissue Orbitrap Exploris 480 Exosomes Mass spectrometry Protein coverage Protein identification and quantification Proteomics Benefits of FAIMS to Improve the Proteome Coverage of Deteriorated and/or Cross-Linked TMT 10-Plex FFPE Tissue and Plasma-Derived Exosomes Samples