Quantitative proteome analysis of temporally-resolved phagosomes following uptake via key phagocytic receptors

Brian Dill, Marek Gierliński, Anetta Härtlova, Alba González Arandilla, Manman Guo, Rosemary G. Clarke, Matthias Trost (Lead / Corresponding author)

    Research output: Contribution to journalArticle

    30 Citations (Scopus)

    Abstract

    Macrophages operate at the forefront of innate immunity and their discrimination of foreign versus "self" particles is critical for a number of responses including efficient pathogen killing, antigen presentation and cytokine induction. In order to efficiently destroy the particles and detect potential threats, macrophages express an array of receptors to sense and phagocytose prey particles. In this study, we accurately quantified a proteomic time-course of isolated phagosomes from murine bone marrow-derived macrophages (BMDMs) induced by particles conjugated to seven different ligands representing pathogen-associated molecular patterns, immune opsonins or apoptotic cell markers. We identified a clear functional differentiation over the three timepoints and detected subtle differences between certain ligand-phagosomes, indicating that triggering of receptors through a single ligand type has mild, but distinct, effects on phagosome proteome and function. Moreover, our data shows that uptake of phosphatidylserine-coated beads induces an active repression of NF-κB immune responses upon TLR-activation by recruitment of anti-inflammatory regulators to the phagosome. This data shows for the first time a systematic time-course analysis of BMDM phagosomes and how phagosome fate is regulated by the receptors triggered for phagocytosis.

    Original languageEnglish
    Article number16
    Pages (from-to)1334
    Number of pages1349
    JournalMolecular & Cellular Proteomics
    Volume14
    Issue number5
    Early online date9 Mar 2015
    DOIs
    Publication statusPublished - 1 May 2015

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