Cited by 495NF-κB Signaling PathwaysRedox biology and oxidative stressImmune Response and Inflammation

Hydrogen Peroxide Activates NF-κB through Tyrosine Phosphorylation of IκBα and Serine Phosphorylation of p65

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Takada, Yasunari, Mukhopadhyay, Asok, Kundu, Gopal C., Mahabeleshwar, Ganapati H., Singh, Sujay, Aggarwal, Bharat B.·2003·Journal of Biological Chemistry

Abstract

Although it is well established that reactive oxygen intermediates mediate the NF-kappaB activation induced by most agents, how H2O2 activates this transcription factor is not well understood. We found that treatment of human myeloid KBM-5 cells with H2O2 activated NF-kappaB in a dose- and time-dependent manner much as tumor necrosis factor (TNF) did but unlike TNF, H2O2 had no effect on IkappaBalpha degradation. Unexpectedly, however, like TNF-induced activation, H2O2-induced NF-kappaB activation was blocked by the calpain inhibitor N-Ac-Leu-Leu-norleucinal, suggesting that a proteosomal pathway was involved. Although H2O2 activated IkappaBalpha kinase, it did not induce the serine phosphorylation of IkappaBalpha. Like TNF, H2O2 induced the serine phosphorylation of the p65 subunit of NF-kappaB, leading to its nuclear translocation. We found that H2O2 induced the tyrosine phosphorylation of IkappaBalpha, which is needed for NF-kappaB activation. We present several lines of evidence to suggest that the Syk protein-tyrosine kinase is involved in H2O2-induced NF-kappaB activation. First, H2O2 activated Syk in KBM-5 cells; second, H2O2 failed to activate NF-kappaB in cells that do not express Syk protein; third, overexpression of Syk increased H2O2-induced NF-kappaB activation; and fourth, reduction of Syk transcription using small interfering RNA inhibited H2O2-induced NF-kappaB activation. We also showed that Syk induced the tyrosine phosphorylation of IkappaBalpha, which caused the dissociation, phosphorylation, and nuclear translocation of p65. Thus, overall, our results demonstrate that H2O2 induces NF-kappaB activation, not through serine phosphorylation or degradation of IkappaBalpha, but through Syk-mediated tyrosine phosphorylation of IkappaBalpha

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  1. Li, N., and Karin, M. (1998) Proc. Natl. Acad. Sci. U. S. A. 95, 13012-13017
  2. Staal, F. J., Roederer, M., Herzenberg, L. A., and Herzenberg, L. A. (1990) Proc. Natl. Acad. Sci. U. S. A. 87, 9943-9947
  3. Hardwick, J. S., and Sefton, B. M. (1995) Proc. Natl. Acad. Sci. U. S. A. 92, 4527-4531

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Authors
Takada, Y., Mukhopadhyay, A., Kundu, G. C., Mahabeleshwar, G. H., Singh, S., & Aggarwal, B. B.
Affiliations
  • The University of Texas MD Anderson Cancer Center (US)
  • National Centre for Cell Science (IN)
Corresponding author
Aggarwal, Bharat B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-06
Volume
278
Issue
26
Pages
24233-24241
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1974559428
Cited by
495
References
52
Citations by year
2026: 18 · 2025: 11 · 2024: 26 · 2023: 18 · 2022: 27 · 2021: 31 · 2020: 27 · 2019: 20 · 2018: 18 · 2017: 21 · 2016: 25 · 2015: 15 · 2014: 10 · 2013: 22 · 2012: 17
FWCI
11.03
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense
  • National Institute of Immunology
  • National Institutes of Health (1r43gm068358-01)
  • U.S. Army
  • National Cancer Institute (P01 CA-91844, P01CA091844)
  • National Institute of General Medical Sciences (R43 GM68358-01)
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 › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
hydrogen peroxide, NF-κB activation, calpain, proteasomal degradation, IκBα kinase, nuclear translocation, reactive oxygen species
MeSH terms
Syk Kinase, Dose-Response Relationship, Drug, Enzyme Precursors, Humans, Hydrogen Peroxide, Kinetics, Phosphorylation, Protein-Tyrosine Kinases, Serine, Tumor Cells, Cultured, Tumor Necrosis Factor-alpha, Tyrosine, NF-kappa B, I-kappa B Proteins, Active Transport, Cell Nucleus, Intracellular Signaling Peptides and Proteins, Transcription Factor RelA

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