Cited by 40Immune Response and InflammationNF-κB Signaling PathwaysInflammation biomarkers and pathways

Inhibition of serum- and glucocorticoid-inducible kinase 1 enhances TLR-mediated inflammation and promotes endotoxin-driven organ failure

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Zhou, Huaxin, Gao, Shegan, Duan, Xiaoxian, Liang, Shuang, Scott, David A., Lamont, Richard J., Wang, Huizhi·2015·The FASEB Journal

Abstract

Serum- and glucocorticoid-regulated kinase (SGK)1 is associated with several important pathologic conditions and plays a modulatory role in adaptive immune responses. However, the involvement and functional role of SGK1 in innate immune responses remain entirely unknown. In this study, we establish that SGK1 is a novel and potent negative regulator of TLR-induced inflammation. Pharmacologic inhibition of SGK1 or suppression by small interfering RNA enhances proinflammatory cytokine (TNF, IL-12, and IL-6) production in TLR-engaged monocytes, a result confirmed in Cre-loxP-mediated SGK1-deficient cells. SGK1 inhibition or gene deficiency results in increased phosphorylation of IKK, IκBα, and NF-κB p65 in LPS-stimulated cells. Enhanced NF-κB p65 DNA binding also occurs upon SGK1 inhibition. The subsequent enhancement of proinflammatory cytokines is dependent on the phosphorylation of TGF-β-activated kinase 1 (TAK1), as confirmed by TAK1 gene silencing. In vivo relevance was established in a murine endotoxin model, in which we found that SGK1 inhibition aggravates the severity of multiple organ damage and enhances the inflammatory response by heightening both proinflammatory cytokine levels and neutrophil infiltration. These findings have identified an anti-inflammatory function of SGK1, elucidated the underlying intracellular mechanisms, and establish, for the first time, that SGK1 holds potential as a novel target for intervention in the control of inflammatory diseases.

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Crossref · 10.1096/fj.15-270462

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  • SGK1 acts as an effective negative regulator in TLR-induced inflammation; pharmacological inhibition or siRNA of SGK1 enhances production of pro-inflammatory cytokines TNF, IL-12, and IL-6 in monocytes bound to TLR.

    “In contrast, SGK1 acts as an effective negative regulator in TLR-induced inflammation. Pharmacological inhibition or suppression using small interfering RNA (siRNA) of SGK1 enhances the production of pro-inflammatory cytokines (such as TNF, IL-12, and IL-6) in monocytes bound to TLR”

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  1. [17]Lu X., Li M., Zhou L., Jiang H., Wang H., Chen J. (2014) Serum- and glucocorticoid-inducible kinase SGK1 as a deleterious mediator of IgA nephropathy. [E-pub ahead of print] Nephrology (Carlton) 19, 307–317 [DOI] [PubMed] [Google Scholar]

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Authors
Zhou, H., Gao, S., Duan, X., Liang, S., Scott, D. A., Lamont, R. J., & Wang, H.
Affiliations
University of Louisville (US)
Venue
The FASEB Journal
Publisher
Wiley
Published
2015-09
Volume
29
Issue
9
Pages
3737-3749
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W1894200683
Cited by
40
References
55
Citations by year
2026: 1 · 2025: 1 · 2024: 6 · 2023: 5 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 4 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 1
FWCI
1.48
Type
journal article
Language
en
Open access
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Dental and Craniofacial Research (R01DE017680, DE017680, R01DE017921, R21DE023633, DE 011111, R37DE011111, DE 017921, DE023633, R01DE011111)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Immunology and Microbiology › Immunology › Inflammation biomarkers and pathways
Keywords
SGK1, Toll-like receptor signaling, innate immunity, inflammation, NF-κB signaling, TAK1, inflammatory cytokines, endotoxin, multiple organ failure, monocytes, neutrophil infiltration, anti-inflammatory targets
MeSH terms
MAP Kinase Kinase Kinase 7, Serum-Glucocorticoid Regulated Kinases, Animals, Female, Humans, Inflammation, Lipopolysaccharides, Male, Mice, Transgenic, Multiple Organ Failure, Cytokines, Protein Serine-Threonine Kinases, Immediate-Early Proteins, MAP Kinase Kinase Kinases, RNA, Small Interfering, Toll-Like Receptors, Mice, I-kappa B Kinase, Transcription Factor RelA

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