The kinase activity of interleukin-1 receptor-associated kinase 2 is essential for lipopolysaccharide-mediated cytokine and chemokine mRNA stability and translation Academic Article uri icon


MeSH Major

  • Cytokines
  • Interleukin-1 Receptor-Associated Kinases
  • Lipopolysaccharides
  • RNA Stability


  • Interleukin-1 receptor-associated kinase 2 (IRAK2) has been shown to be essential for lipopolysaccharide (LPS)-mediated posttranscriptional control of cytokine and chemokine production. In this study, we investigated the role of IRAK2 kinase activity in LPS-mediated posttranscriptional control by reconstituting IRAK2-deficient macrophages with either wild-type or kinase-inactive IRAK2. Compared with wild-type IRAK2 (IRAK2-WT) macrophages, kinase-inactive IRAK2 (IRAK2-KD) macrophages show reduced cytokine and chemokine mRNA stability and translation in response to LPS. Further, LPS-treated IRAK2-KD macrophages also show reduced activation of MKK3/6, MNK1, and eIF4E and attenuated toll-like receptor 4-induced tristetraprolin modification and stabilization. Taken together, these results suggest that the kinase activity of IRAK2 is required for the optimal activation of mitogen-activated protein kinase signaling, which regulates cytokine and chemokine production at posttranscriptional levels.

publication date

  • May 2011



  • Academic Article



  • eng

PubMed Central ID

  • PMC3083721

Digital Object Identifier (DOI)

  • 10.1089/jir.2010.0094

PubMed ID

  • 21291324

Additional Document Info

start page

  • 415

end page

  • 22


  • 31


  • 5