論文

査読有り
2015年

eIF2α-Independent Inhibition of TNF-α-Triggered NF-κB Activation by Salubrinal.

Biological & pharmaceutical bulletin
  • Shotaro Nakajima
  • ,
  • Yuan Chi
  • ,
  • Kun Gao
  • ,
  • Koji Kono
  • ,
  • Jian Yao

38
9
開始ページ
1368
終了ページ
74
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1248/bpb.b15-00312

Salubrinal is a selective inhibitor of cellular complexes that dephosphorylate eukaryotic translation initiation factor 2α (eIF2α). In previous reports, salubrinal was shown to have the potential to inhibit the activation of nuclear factor-κB (NF-κB) by several stimuli. However, the effects of salubrinal on NF-κB signaling are largely unknown. In this study, we investigated whether and how salubrinal affects NF-κB activation induced by tumor necrosis factor (TNF)-α and interleukin (IL)-1β. We found that salubrinal selectively blocked TNF-α- but not IL-1β-induced activation of NF-κB. This inhibitory effect occurred upstream of transforming growth factor (TGF)-β-activated kinase 1 (TAK1). Further experiments revealed that salubrinal blocked TNF-α-triggered NF-κB activation independent of its action on eIF2α because knockdown of eIF2α by small interfering RNA (siRNA) did not reverse the inhibitory effect of salubrinal on NF-κB. Moreover, guanabenz, a selective inhibitor of the regulatory subunit of protein phosphatase (PP) 1, also preferentially inhibited TNF-α-triggered activation of NF-κB. These findings raise the possibility that salubrinal may selectively block TNF-α-triggered activation of the NF-κB pathway through inhibition of the PP1 complex.

リンク情報
DOI
https://doi.org/10.1248/bpb.b15-00312
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/26328492
ID情報
  • DOI : 10.1248/bpb.b15-00312
  • PubMed ID : 26328492

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