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- W4313374411 abstract "Abstract Generation of antibody secreting cells (ASCs) requires multiple B cell activation pathways, including B cell receptor (BCR), T cell receptor (TCR), and Toll-like receptors (TLRs). In human naïve B cells, we reported that knockdown of interferon regulatory factor 5 (IRF5) resulted in IgD retention, reduced proliferation and plasma cell differentiation, and reduced IgG secretion. Defects were due to early impairments in B cell activation and clonal expansion. Conversely, murine Irf5 was reported to regulate antibody production through direct control of class switch recombination (CSR) at the γ2a locus. To further elucidate distinct and overlapping roles between human and murine IRF5 in the regulation of plasma cell differentiation and antibody production, we performed in vivo analysis of B and T cell differentiation and function in wild-type (wt) and Irf5 knockout (ko) littermate mice after immunization. B and T cell subsets were analyzed by multi-color flow cytometry. Naïve B cells were in vitro differentiated to ASCs with CpG-B, anti-IgM, anti-CD40 and IL-21. Kinetics of B cell activation, AID expression and IgG production were determined. BCR and TCR signaling were examined by phospho-flow. A combination of T-dependent/independent and TLR-dependent/independent immunizations were used to study ASC differentiation. RAG−/− mice were used to determine cell type-specific effects. Results indicate distinct roles for human and murine IRF5 at the early stages of BCR signaling and redundant roles at the later stages of CSR, plasma cell differentiation and antibody secretion via regulation of AID." @default.
- W4313374411 created "2023-01-06" @default.
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- W4313374411 date "2020-05-01" @default.
- W4313374411 modified "2023-09-27" @default.
- W4313374411 title "<i>In vivo</i> mechanisms by which Irf5 regulates BCR-, TCR- and TLR-induced plasma cell generation and antibody secretion" @default.
- W4313374411 doi "https://doi.org/10.4049/jimmunol.204.supp.71.5" @default.
- W4313374411 hasPublicationYear "2020" @default.
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