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- W1530344826 abstract "The human IgA FcR (FcalphaRI; CD89) mediates a variety of immune system functions including degranulation, endocytosis, phagocytosis, cytokine synthesis, and cytokine release. We have identified a common, nonsynonymous, single nucleotide polymorphism (SNP) in the coding region of CD89 (844A-->G) (rs16986050), which changes codon 248 from AGC (Ser(248)) to GGC (Gly(248)) in the cytoplasmic domain of the receptor. The two different alleles demonstrate significantly different FcalphaRI-mediated intracellular calcium mobilization and degranulation in rat basophilic leukemia cells and cytokine production (IL-6 and TNF-alpha) in murine macrophage P388D1 cells. In the absence of FcR gamma-chain association in P388D1 cells, the Ser(248)-FcalphaRI allele does not mediate cytokine production, but the Gly(248)-FcalphaRI allele retains the capacity to mediate a robust production of proinflammatory cytokine. This allele-dependent difference is also seen with FcalphaRI-mediated IL-6 cytokine release by human neutrophils ex vivo. These findings and the enrichment of the proinflammatory Gly(248)-FcalphaRI allele in systemic lupus erythematosus populations in two ethnic groups compared with their respective non-systemic lupus erythematosus controls suggest that FcalphaRI (CD89) alpha-chain alleles may affect receptor-mediated signaling and play an important role in the modulation of immune responses in inflammatory diseases." @default.
- W1530344826 created "2016-06-24" @default.
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- W1530344826 date "2007-03-15" @default.
- W1530344826 modified "2023-10-01" @default.
- W1530344826 title "FcαRI (CD89) Alleles Determine the Proinflammatory Potential of Serum IgA" @default.
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- W1530344826 doi "https://doi.org/10.4049/jimmunol.178.6.3973" @default.
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