Response and resistance to NF-κB inhibitors in mouse models of lung adenocarcinoma

Wen Xue, Etienne Meylan, Trudy G. Oliver, David M. Feldser, Monte M. Winslow, Roderick Bronson, Tyler Jacks

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

Lung adenocarcinoma is a leading cause of cancer death worldwide. We recently showed that genetic inhibition of the NF-κB pathway affects both the initiation and the maintenance of lung cancer, identifying this pathway as a promising therapeutic target. In this investigation, we tested the efficacy of small-molecule NF-κB inhibitors in mouse models of lung cancer. In murine lung adenocarcinoma cell lines with high NF-κB activity, the proteasome inhibitor bortezomib efficiently reduced nuclear p65, repressed NF-κB target genes, and rapidly induced apoptosis. Bortezomib also induced lung tumor regression and prolonged survival in tumor-bearing Kras LSL-G12D/wt:p53 flox/flox mice but not in Kras LSL-G12D/wt mice. After repeated treatment, initially sensitive lung tumors became resistant to bortezomib. A second NF-κB inhibitor, Bay-117082, showed similar therapeutic efficacy and acquired resistance in mice. Our results using preclinical mouse models support the NF-κB pathway as a potential therapeutic target for a defined subset of lung adenocarcinoma. SIGNIFICANCE: Using small-molecule compounds that inhibit NF-κB activity, we provide evidence that NF-κB inhibition has therapeutic efficacy in the treatment of lung cancer. Our results also illustrate the value of mouse models in validating new drug targets in vivo and indicate that acquired chemoresistance may later influence bortezomib treatment in lung cancer.

Original languageEnglish
Pages (from-to)236-247
Number of pages12
JournalCancer Discovery
Volume1
Issue number3
DOIs
StatePublished - Aug 2011
Externally publishedYes

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