alexa The kinase TBK1 controls IgA class switching by negatively regulating noncanonical NF-κB signaling.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Jin J, Xiao Y, Chang JH, Yu J, Hu H, , Jin J, Xiao Y, Chang JH, Yu J, Hu H,

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Abstract Immunoglobulin class switching is crucial for the generation of antibody diversity in humoral immunity and, when deregulated, also has severe pathological consequences. How the magnitude of immunoglobulin isotype switching is controlled is still poorly understood. Here we identify the kinase TBK1 as a pivotal negative regulator of class switching to the immunoglobulin A (IgA) isotype. B cell-specific ablation of TBK1 in mice resulted in uncontrolled production of IgA and the development of nephropathy-like disease signs. TBK1 negatively regulated IgA class switching by attenuating noncanonical signaling via the transcription factor NF-κB, an action that involved TBK1-mediated phosphorylation and subsequent degradation of the NF-κB-inducing kinase NIK. Our findings establish TBK1 as a pivotal negative regulator of the noncanonical NF-κB pathway and identify a unique mechanism that controls IgA production.
This article was published in Nat Immunol and referenced in Journal of Cancer Science & Therapy

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