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- W2892223298 abstract "Abstract Autoantibody-mediated diseases are currently treated with intravenous immunoglobulin, which is thought to act in part via blockade of Fc gamma receptors, thereby inhibiting autoantibody effector functions and subsequent pathology. We aimed to develop recombinant molecules with enhanced Fc receptor avidity and thus increased potency over intravenous immunoglobulin. Here we describe the molecular engineering of human Fc hexamers and explore their therapeutic and safety profiles. We show Fc hexamers were more potent than IVIG in phagocytosis blockade and disease models. However, in human whole-blood safety assays incubation with IgG1 isotype Fc hexamers resulted in cytokine release, platelet and complement activation, whereas the IgG4 version did not. We used a statistically designed mutagenesis approach to identify the key Fc residues involved in these processes. Cytokine release was found to be dependent on neutrophil FcγRIIIb interactions with L234 and A327 in the Fc. Therefore, Fc hexamers provide unique insights into Fc receptor biology." @default.
- W2892223298 created "2018-09-27" @default.
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- W2892223298 date "2018-09-14" @default.
- W2892223298 modified "2023-10-01" @default.
- W2892223298 title "Engineered hexavalent Fc proteins with enhanced Fc-gamma receptor avidity provide insights into immune-complex interactions" @default.
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- W2892223298 doi "https://doi.org/10.1038/s42003-018-0149-9" @default.
- W2892223298 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6138732" @default.
- W2892223298 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30272022" @default.
- W2892223298 hasPublicationYear "2018" @default.