RGD Reference Report - Crosstalk between the canonical NF-κB and Notch signaling pathways inhibits Pparγ expression and promotes pancreatic cancer progression in mice. - Rat Genome Database

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Crosstalk between the canonical NF-κB and Notch signaling pathways inhibits Pparγ expression and promotes pancreatic cancer progression in mice.

Authors: Maniati, Eleni  Bossard, Maud  Cook, Natalie  Candido, Juliana B  Emami-Shahri, Nia  Nedospasov, Sergei A  Balkwill, Frances R  Tuveson, David A  Hagemann, Thorsten 
Citation: Maniati E, etal., J Clin Invest. 2011 Dec;121(12):4685-99. doi: 10.1172/JCI45797. Epub 2011 Nov 7.
RGD ID: 13838742
Pubmed: PMID:22056382   (View Abstract at PubMed)
PMCID: PMC3225987   (View Article at PubMed Central)
DOI: DOI:10.1172/JCI45797   (Journal Full-text)

The majority of human pancreatic cancers have activating mutations in the KRAS proto-oncogene. These mutations result in increased activity of the NF-κB pathway and the subsequent constitutive production of proinflammatory cytokines. Here, we show that inhibitor of κB kinase 2 (Ikk2), a component of the canonical NF-κB signaling pathway, synergizes with basal Notch signaling to upregulate transcription of primary Notch target genes, resulting in suppression of antiinflammatory protein expression and promotion of pancreatic carcinogenesis in mice. We found that in the Kras(G12D)Pdx1-cre mouse model of pancreatic cancer, genetic deletion of Ikk2 in initiated pre-malignant epithelial cells substantially delayed pancreatic oncogenesis and resulted in downregulation of the classical Notch target genes Hes1 and Hey1. Tnf-α stimulated canonical NF-κB signaling and, in collaboration with basal Notch signals, induced optimal expression of Notch targets. Mechanistically, Tnf-α stimulation resulted in phosphorylation of histone H3 at the Hes1 promoter, and this signal was lost with Ikk2 deletion. Hes1 suppresses expression of Pparg, which encodes the antiinflammatory nuclear receptor Pparγ. Thus, crosstalk between Tnf-α/Ikk2 and Notch sustains the intrinsic inflammatory profile of transformed cells. These findings reveal what we believe to be a novel interaction between oncogenic inflammation and a major cell fate pathway and show how these pathways can cooperate to promote cancer progression.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
Pancreatic Intraepithelial Neoplasia disease_progressionISOIkbkb (Mus musculus)13838742; 13838742 RGD 
Pancreatic Intraepithelial Neoplasia disease_progressionIMP 13838742 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Ikbkb  (inhibitor of nuclear factor kappa B kinase subunit beta)

Genes (Mus musculus)
Ikbkb  (inhibitor of kappaB kinase beta)

Genes (Homo sapiens)
IKBKB  (inhibitor of nuclear factor kappa B kinase subunit beta)


Additional Information