Cited by 1,614NF-κB Signaling PathwaysCancer, Hypoxia, and MetabolismSignaling Pathways in Disease

The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.

NF-κB links innate immunity to the hypoxic response through transcriptional regulation of HIF-1α

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Abstract

The hypoxic response is an ancient stress response triggered by low ambient oxygen (O2) (ref. 1) and controlled by hypoxia-inducible transcription factor-1 (HIF-1), whose alpha subunit is rapidly degraded under normoxia but stabilized when O2-dependent prolyl hydroxylases (PHDs) that target its O2-dependent degradation domain are inhibited. Thus, the amount of HIF-1alpha, which controls genes involved in energy metabolism and angiogenesis, is regulated post-translationally. Another ancient stress response is the innate immune response, regulated by several transcription factors, among which NF-kappaB plays a central role. NF-kappaB activation is controlled by IkappaB kinases (IKK), mainly IKK-beta, needed for phosphorylation-induced degradation of IkappaB inhibitors in response to infection and inflammation. IKK-beta is modestly activated in hypoxic cell cultures when PHDs that attenuate its activation are inhibited. However, defining the relationship between NF-kappaB and HIF-1alpha has proven elusive. Using in vitro systems, it was reported that HIF-1alpha activates NF-kappaB, that NF-kappaB controls HIF-1alpha transcription and that HIF-1alpha activation may be concurrent with inhibition of NF-kappaB. Here we show, with the use of mice lacking IKK-beta in different cell types, that NF-kappaB is a critical transcriptional activator of HIF-1alpha and that basal NF-kappaB activity is required for HIF-1alpha protein accumulation under hypoxia in cultured cells and in the liver and brain of hypoxic animals. IKK-beta deficiency results in defective induction of HIF-1alpha target genes including vascular endothelial growth factor. IKK-beta is also essential for HIF-1alpha accumulation in macrophages experiencing a bacterial infection. Hence, IKK-beta is an important physiological contributor to the hypoxic response, linking it to innate immunity and inflammation.

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Metadata

Authors
Rius, J., Guma, M., Schachtrup, C., Akassoglou, K., Zinkernagel, A. S., Nizet, V., Johnson, R. S., Haddad, G. G., & Karin, M.
Affiliations
University of California San Diego (US)
Corresponding author
Karin, Michael
Venue
Nature
Published
2008-04-23
Volume
453
Issue
7196
Pages
807-811
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2162121911
Cited by
1,614
References
34
Citations by year
2026: 89 · 2025: 85 · 2024: 79 · 2023: 78 · 2022: 81 · 2021: 107 · 2020: 79 · 2019: 77 · 2018: 82 · 2017: 70 · 2016: 97 · 2015: 95 · 2014: 105 · 2013: 91 · 2012: 89
FWCI
35.14
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA118165)
  • National Institute of Allergy and Infectious Diseases (R01AI043477)
  • National Center for Research Resources (P41RR004050)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
NF-κB, HIF-1α, hypoxia response, innate immunity, IKKβ, transcriptional regulation, prolyl hydroxylase, oxygen-dependent degradation, inflammation, liver, brain, hypoxia-inducible factor, IκB kinase, oxygen sensing
MeSH terms
Animals, Hypoxia, Brain, Gene Expression Regulation, Immunity, Innate, Inflammation, Liver, Macrophages, Transcription, Genetic, Cell Hypoxia, NF-kappa B, Mice, I-kappa B Kinase, Hypoxia-Inducible Factor 1, alpha Subunit

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