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- W2912471732 abstract "Abstract The importance of neutrophils in the pathogenesis of autoimmune rheumatic diseases, such as systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA), is increasingly recognised. Generation of reactive oxygen species (ROS) and release of neutrophil extracellular traps (NETs) by activated neutrophils are both thought to contribute to pathology; although the underlying mechanisms, particularly the effects of IgG autoantibodies upon neutrophil function, are not fully understood. Therefore, we determined whether purified IgG from patients with SLE or RA have differential effects upon neutrophil activation and function. We found that SLE- and RA-IgG both bound human neutrophils but differentially regulated neutrophil function. RA- and SLE-IgG both increased PMA-induced β 1 integrin-mediated adhesion to fibronectin, whilst only SLE-IgG enhanced α M β 2 integrin-mediated adhesion to fibrinogen. Interestingly, only SLE-IgG modulated neutrophil adhesion to endothelial cells. Both SLE- and RA-IgG increased ROS generation and DNA externalisation by unstimulated neutrophils. Only SLE-IgG however, drove DNA externalisation following neutrophil activation. Co-culture of neutrophils with resting endothelium prevented IgG-mediated increase of extracellular DNA, but this inhibition was overcome for SLE-IgG when the endothelium was stimulated with TNF-α. This differential pattern of neutrophil activation has implications for understanding SLE and RA pathogenesis and may highlight avenues for development of novel therapeutic strategies." @default.
- W2912471732 created "2019-02-21" @default.
- W2912471732 creator A5009546060 @default.
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- W2912471732 date "2019-02-04" @default.
- W2912471732 modified "2023-10-16" @default.
- W2912471732 title "Autoimmune rheumatic disease IgG has differential effects upon neutrophil integrin activation that is modulated by the endothelium" @default.
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- W2912471732 doi "https://doi.org/10.1038/s41598-018-37852-5" @default.
- W2912471732 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6361939" @default.
- W2912471732 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30718722" @default.
- W2912471732 hasPublicationYear "2019" @default.
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