Neutrophil-Derived IL-1β Impairs the Efficacy of NF-κB Inhibitors against Lung Cancer.

McLoed AG, Sherrill TP, Cheng DS, Han W, Saxon JA, Gleaves LA, Wu P, Polosukhin VV, Karin M, Yull FE, Stathopoulos GT, Georgoulias V, Zaynagetdinov R, Blackwell TS
Cell Rep. 2016 16 (1): 120-132

PMID: 27320908 · PMCID: PMC4927403 · DOI:10.1016/j.celrep.2016.05.085

Although epithelial NF-κB signaling is important for lung carcinogenesis, NF-κB inhibitors are ineffective for cancer treatment. To explain this paradox, we studied mice with genetic deletion of IKKβ in myeloid cells and found enhanced tumorigenesis in Kras(G12D) and urethane models of lung cancer. Myeloid-specific inhibition of NF-κB augmented pro-IL-1β processing by cathepsin G in neutrophils, leading to increased IL-1β and enhanced epithelial cell proliferation. Combined treatment with bortezomib, a proteasome inhibitor that blocks NF-κB activation, and IL-1 receptor antagonist reduced tumor formation and growth in vivo. In lung cancer patients, plasma IL-1β levels correlated with poor prognosis, and IL-1β increased following bortezomib treatment. Together, our studies elucidate an important role for neutrophils and IL-1β in lung carcinogenesis and resistance to NF-κB inhibitors.

Copyright © 2016 The Author(s). Published by Elsevier Inc. All rights reserved.

MeSH Terms (16)

Animals Bortezomib Carcinogenesis Carcinoma, Non-Small-Cell Lung Cell Proliferation Epithelial Cells Humans I-kappa B Kinase Interleukin-1beta Lung Neoplasms Mice Myeloid Cells Neutrophils NF-kappa B Signal Transduction Survival Analysis

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