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- W3087833446 abstract "Abstract Equine recurrent uveitis (ERU) is a spontaneous, remitting-relapsing autoimmune disease driven by the adaptive immune system. Although T cells are described as the main effector cells in pathogenesis, granulocytes have also emerged as possible disease mediators. To explore the role of these innate immune cells, we investigated the whole cell proteome of granulocytes from equine recurrent uveitis cases and healthy controls. Among the 2362 proteins identified by mass spectrometry, we found 96 proteins with significantly changed abundance between groups (p 1.2), representing 4.1% of total granulocyte proteome. Within these differential identifications, calgranulin B, a protein associated with pathogenesis in other autoimmune diseases, showed highest abundance in equine recurrent uveitis (18 fold). For a better interpretation of the results from our hypothesis-generating approach, we added a threshold for biological significance (ratio ERU/controls >2: 36 proteins) to the proteins with increased abundance in equine recurrent uveitis and analyzed their allocation to the subsets within the Immune System superpathway. The 36 differentially abundant proteins predominantly associated to RAF/MAP kinase cascade, MHC-I-mediated antigen presentation and neutrophil degranulation, suggesting a latently activated phenotype of these innate immune cells in disease. Raw data are available via ProteomeXchange with identifier PXD013648 . Significance Our study provides new insights into the protein repertoire of primary equine granulocytes and identifies protein abundance changes associated to equine recurrent uveitis (ERU), an organ specific, spontaneously occurring autoimmune disease. We show that granulocyte proteins with increased abundance in ERU strongly associate to RAF/MAP kinase signaling, MHC-I antigen presentation and neutrophil degranulation, pointing to a more activated state of these cells in ERU cases. Since cells were obtained in quiescent stage of disease, latent activation of granulocytes underlines the role of these innate immune cells in ERU. These findings are highly relevant for veterinary medicine, further establishing the importance of granulocytes in this T cell-driven autoimmune disease. Moreover, they have translational quality for autoimmune uveitis in man, due to strong similarity in disease occurrence, progression and pathogenesis." @default.
- W3087833446 created "2020-10-01" @default.
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- W3087833446 date "2021-01-01" @default.
- W3087833446 modified "2023-10-18" @default.
- W3087833446 title "Deviant proteome profile of equine granulocytes associates to latent activation status in organ specific autoimmune disease" @default.
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- W3087833446 doi "https://doi.org/10.1016/j.jprot.2020.103989" @default.
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