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Targeted disruption of the zetaPKC gene results in the impairment of the NF-kappaB pathway.

Here we have addressed the role that zetaPKC plays in NF-kappaB activation using mice in which this kinase was inactivated by homologous recombination. These mice, although grossly normal, showed phenotypic alterations in secondary lymphoid organs reminiscent of those of the TNF receptor-1 and of the lymphotoxin-beta receptor gene-deficient mice. The lack of zetaPKC in embryonic fibroblasts (EFs) severely impairs kappaB-dependent transcriptional activity as well as cytokine-induced phosphorylation of p65. Also, a cytokine-inducible interaction of zetaPKC with p65 was detected which requires the previous degradation of IkappaB. Although in zetaPKC-/- EFs this kinase is not necessary for IKK activation, in lung, which abundantly expresses zetaPKC, IKK activation is inhibited.

Pubmed ID: 11684013

Authors

  • Leitges M
  • Sanz L
  • Martin P
  • Duran A
  • Braun U
  • GarcĂ­a JF
  • Camacho F
  • Diaz-Meco MT
  • Rennert PD
  • Moscat J

Journal

Molecular cell

Publication Data

October 30, 2001

Associated Grants

None

Mesh Terms

  • Acetylcysteine
  • Animals
  • Apoptosis
  • Cycloheximide
  • Cysteine Proteinase Inhibitors
  • DNA-Binding Proteins
  • Enzyme Activation
  • Female
  • Fibroblasts
  • Gene Targeting
  • Genes, Reporter
  • I-kappa B Kinase
  • I-kappa B Proteins
  • Interleukin-1
  • Lung
  • Lymphocyte Subsets
  • Male
  • Mice
  • Mice, Knockout
  • NF-kappa B
  • Peyer's Patches
  • Phenotype
  • Phosphorylation
  • Protein Kinase C
  • Protein Synthesis Inhibitors
  • Protein-Serine-Threonine Kinases
  • Recombinant Proteins
  • Spleen
  • Transcription Factor RelA
  • Transcription Factors
  • Transcription, Genetic
  • Tumor Necrosis Factor-alpha