Cited by 33NF-κB Signaling PathwaysImmunotherapy and Immune ResponsesImmune Response and Inflammation

Serum- and Glucocorticoid-Inducible Kinase 1 Sensitive NF-κB Signaling in Dendritic Cells

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Schmid, Evi, Xuan, Nguyen Thi, Zahir, Naima, Russo, Antonella, Yang, Wenting, Kuhl, Dietmar, Faggio, Caterina, Shumilina, Ekaterina +1 more·2014·Cellular Physiology and Biochemistry

Abstract

BACKGROUND/AIMS: Dendritic cells (DCs), antigen-presenting cells linking innate and adaptive immunity, are required for initiation of specific T cell-driven immune responses. Phosphoinositide-3-kinase (PI3K) suppresses proinflammatory cytokine production in DCs, which limits T helper (Th1) polarization. PI3K is in part effective by downregulation of transcription factor NF-κB. Downstream signaling elements of PI3K include serum- and glucocorticoid-inducible kinase 1 (SGK1) and its phosphorylation target N-myc downstream regulated gene 1 (NDRG1). The present study explored whether SGK1 and NDRG1 play a role in the regulation of NF-κB and DC-maturation. METHODS: DCs were isolated from bone marrow (BMDCs) or spleen of mice lacking functional SGK1 (sgk1(-/-)) and corresponding wild type mice (sgk1(+/+)). Protein abundance was determined by Western blotting. Transcription was inhibited by siRNA. Abundance of maturation markers was quantified by flow cytometry. FITC-dextran uptake was determined to quantify phagocytosis. RESULTS: NDRG1 was similarly expressed in sgk1(+/+) and sgk1(-/-)BMDCs, but SGK1-dependent phosphorylation of NDRG-1 was decreased in sgk1(-/-)BMDCs. Silencing of NDRG1 in sgk1(+/+)BMDCs as compared to control empty vector-treated BMDCs enhanced nuclear abundance of NF-κB subunit p65. Moreover, the abundance of phosphorylated NF-κB inhibitor IκBα, of phosphorylated IκB kinase (IKKα/β) and of nuclear p65 were significantly higher in sgk1(-/-)BMDCs than in sgk1(+/+)BMDCs. Expression of maturation markers, MHC II, and CD86, was significantly larger and phagocytic capacity was significantly lower in sgk1(-/-) than in sgk1(+/+)BMDCs. Expression of CD86 and MHCII was also significantly higher in DCs isolated from the spleen of sgk1(-/-) mice than those from sgk1(+/+)mice. CONCLUSION: SGK1 and NDRG1 participate in the regulation of NF-κB signaling in and maturation of DCs.

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  • SGK1 and its phosphorylated target NDRG1 are involved in regulation and maturation of NF-κB signaling in antigen-presenting dendritic cells.

    “SGK1 and its phosphorylated target NDRG1 are involved in the regulation and maturation of NF-κB signaling in antigen-presenting dendritic cells”

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Authors
Schmid, E., Xuan, N. T., Zahir, N., Russo, A., Yang, W., Kuhl, D., Faggio, C., Shumilina, E., & Lang, F.
Affiliations
  • University of Tübingen (DE)
  • University Medical Center Hamburg-Eppendorf (DE)
  • University of Messina (IT)
Venue
Cellular Physiology and Biochemistry
Publisher
S. Karger AG
Published
2014
Volume
34
Issue
3
Pages
943-954
ISSN
  • 1015-8987 (ISSN-L)
  • 1421-9778
OpenAlex
W2117121496
Cited by
33
References
60
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 7 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 5 · 2015: 3
FWCI
0.96
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Cellular Physiology and Biochemistry (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
SGK1, NDRG1, NF-κB signaling, dendritic cells, dendritic cell maturation, phosphatidylinositol 3-kinase, IκBα phosphorylation, IKKα/β, p65 nuclear translocation, MHC class II, CD86, phagocytosis, Th1 polarization, antigen presentation, bone marrow-derived dendritic cells, spleen
MeSH terms
Serum-Glucocorticoid Regulated Kinases, N-myc Downstream-Regulated Gene 1 Protein, Animals, Base Sequence, Cell Differentiation, Dendritic Cells, Mice, Inbred C57BL, Phagocytosis, Phosphorylation, Up-Regulation, NF-kappa B, Protein Serine-Threonine Kinases, Immediate-Early Proteins, DNA Primers, Mice, Knockout, Cell Cycle Proteins, Intracellular Signaling Peptides and Proteins, Mice, Real-Time Polymerase Chain Reaction

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