Cited by 203NF-κB Signaling PathwaysRedox biology and oxidative stressCell death mechanisms and regulation

Reactive oxygen species are downstream products of TRAF-mediated signal transduction

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Chandel, Navdeep S., Schumacker, Paul T., Arch, Robert H.·2001·Journal of Biological Chemistry

Abstract

Members of the TNFR (tumor necrosis factor receptor) superfamily are involved in regulating activation and differentiation of cells as well as cell survival and programmed cell death/apoptosis. Multimerization of TNFRs can lead to recruitment of TRAFs (TNFR-associated factors) by the receptors resulting in activation of kinases and transcription factors, such as c-Jun N-terminal kinase and nuclear factor kappaB (NF-kappaB). Signal transduction triggered by TNF-alpha also induces an increase in intracellular reactive oxygen species (ROS). ROS have been suggested to play a role in NF-kappaB activation, which is thought to promote cell survival. However, oxidation of proteins and lipids by ROS can also result in apoptosis. The processes generating intracellular ROS and the mechanism(s) regulating the cellular redox status have not been fully elucidated. We investigated whether TRAFs play a role in controlling intracellular ROS levels. Our results indicate that recruitment of TRAFs to the plasma membrane of human embryonic kidney (HEK) 293 cells is crucial for activation of signaling pathways, which regulate ROS production in mitochondria. TRAF-mediated changes in ROS levels enhanced NF-kappaB activation but were not dependent on NF-kappaB-inducing kinase. Consistent with its anti-apoptotic function, Bcl-x(L) interfered with TRAF-mediated ROS generation but not NF-kappaB activation. Taken together, our results suggest a novel role of TRAFs in signal transduction pathways triggered by TNFR-related proteins, which balance cell survival and apoptosis by regulating the electron transport in mitochondria.

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  1. Rothe, M., Xiong, J., Shu, H. B., Williamson, K., Goddard, A., and Goeddel, D. V. (1996) Proc. Natl. Acad. Sci. U. S. A. 93, 8241-8246
  2. Song, H. Y., Rothe, M., and Goeddel, D. V. (1996) Proc. Natl. Acad. Sci. U. S. A. 93, 6721-6725

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Authors
Chandel, N. S., Schumacker, P. T., & Arch, R. H.
Affiliations
  • University of Chicago (US)
  • Washington University in St. Louis (US)
Corresponding author
Arch, Robert H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-11
Volume
276
Issue
46
Pages
42728-42736
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2039620761
Cited by
203
References
54
Citations by year
2026: 1 · 2025: 6 · 2024: 5 · 2023: 8 · 2022: 4 · 2021: 7 · 2020: 11 · 2019: 7 · 2018: 10 · 2017: 13 · 2016: 9 · 2015: 2 · 2014: 11 · 2013: 2 · 2012: 7
FWCI
4.27
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
reactive oxygen species, TRAF, TNF receptor superfamily, signal transduction, NF-κB activation, apoptosis, cell survival, mitochondrial electron transport chain, Bcl-xL, redox regulation, TNF signaling
MeSH terms
Bacterial Proteins, Cell Line, Cell Membrane, Cell Survival, Cytoplasm, Electron Transport, Enzyme Activation, Humans, Luciferases, Models, Biological, Oxidation-Reduction, Oxygen, Protein Binding, Subcellular Fractions, Transfection, Blotting, Western, Signal Transduction, NF-kappa B, Apoptosis, Reactive Oxygen Species, Protein Structure, Tertiary, Ki-1 Antigen, CD28 Antigens, Proto-Oncogene Proteins c-bcl-2, Mitogen-Activated Protein Kinases, JNK Mitogen-Activated Protein Kinases, bcl-X Protein

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