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Articles by Juliusz Pryjma
Total Records ( 1 ) for Juliusz Pryjma
  Jerzy Frczek , Tae Whan Kim , Hui Xiao , Jianhong Yao , Qian Wen , Yali Li , Jean-Laurent Casanova , Juliusz Pryjma and Xiaoxia Li
  Two parallel interleukin-1 (IL-1)-mediated signaling pathways have been uncovered for IL-1R-TLR-mediated NFκB activation: TAK1-dependent and MEKK3-dependent pathways, respectively. The TAK1-dependent pathway leads to IKKα/β phosphorylation and IKKβ activation, resulting in classic NFκB activation through IκBα phosphorylation and degradation. The TAK1-independent MEKK3-dependent pathway involves IKKγ phosphorylation and IKKα activation, resulting in NFκB activation through dissociation of phosphorylated IκBα from NFκB without IκBα degradation. IL-1 receptor-associated kinase 4 (IRAK4) belongs to the IRAK family of proteins and plays a critical role in IL-1R/TLR-mediated signaling. IRAK4 kinase-inactive mutant failed to mediate the IL-1R-TLR-induced TAK1-dependent NFκB activation pathway, but mediated IL-1-induced TAK1-independent NFκB activation and retained the ability to activate substantial gene expression, indicating a structural role of IRAK4 in mediating this alternative NFκB activation pathway. Deletion analysis of IRAK4 indicates the essential structural role of the IRAK4 death domain in receptor proximal signaling for mediating IL-1R-TLR-induced NFκB activation.
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