Go to JCI Insight
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Alerts
  • Advertising/recruitment
  • Subscribe
  • Contact
  • Current Issue
  • Past Issues
  • By specialty
    • COVID-19
    • Cardiology
    • Gastroenterology
    • Immunology
    • Metabolism
    • Nephrology
    • Neuroscience
    • Oncology
    • Pulmonology
    • Vascular biology
    • All ...
  • Videos
    • Conversations with Giants in Medicine
    • Author's Takes
  • Reviews
    • View all reviews ...
    • 100th Anniversary of Insulin's Discovery (Jan 2021)
    • Hypoxia-inducible factors in disease pathophysiology and therapeutics (Oct 2020)
    • Latency in Infectious Disease (Jul 2020)
    • Immunotherapy in Hematological Cancers (Apr 2020)
    • Big Data's Future in Medicine (Feb 2020)
    • Mechanisms Underlying the Metabolic Syndrome (Oct 2019)
    • Reparative Immunology (Jul 2019)
    • View all review series ...
  • Viewpoint
  • Collections
    • Recently published
    • In-Press Preview
    • Commentaries
    • Concise Communication
    • Editorials
    • Viewpoint
    • Top read articles
  • Clinical Medicine
  • JCI This Month
    • Current issue
    • Past issues

  • Current issue
  • Past issues
  • Specialties
  • Reviews
  • Review series
  • Conversations with Giants in Medicine
  • Author's Takes
  • In-Press Preview
  • Commentaries
  • Concise Communication
  • Editorials
  • Viewpoint
  • Top read articles
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Alerts
  • Advertising/recruitment
  • Subscribe
  • Contact
CXCR2 ligands and G-CSF mediate PKCα-induced intraepidermal inflammation
Christophe Cataisson, … , Saveria Pastore, Stuart H. Yuspa
Christophe Cataisson, … , Saveria Pastore, Stuart H. Yuspa
Published October 2, 2006
Citation Information: J Clin Invest. 2006;116(10):2757-2766. https://doi.org/10.1172/JCI27514.
View: Text | PDF
Research Article Dermatology

CXCR2 ligands and G-CSF mediate PKCα-induced intraepidermal inflammation

  • Text
  • PDF
Abstract

Transgenic mice overexpressing PKCα in the epidermis (K5-PKCα mice) exhibit an inducible severe intraepidermal neutrophilic inflammation and systemic neutrophilia when PKCα is activated by topical 12-O-tetradecanoylphorbol-13-acetate (TPA). This inducible model of cutaneous inflammation was used to define mediators of skin inflammation that may have clinical relevance. Activation of cutaneous PKCα increased the production of the chemotactic factors cytokine-induced neutrophil chemoattractant (KC) and macrophage inflammatory protein 2 (MIP-2) in murine plasma. TPA treatment of cultured K5-PKCα keratinocytes also released KC and MIP-2 into culture supernatants through an NF-κB–dependent pathway. MIP-2 and KC mediated the infiltration of neutrophils into the epidermis, since this was prevented by ablating CXCR2 in K5-PKCα mice or administering neutralizing antibodies against KC or MIP-2. The neutrophilia resulted from PKCα-mediated upregulation of cutaneous G-CSF released into the plasma independent of CXCR2. These responses could be inhibited by topical treatment with a PKCα-selective inhibitor. Inhibiting PKCα also reduced the basal and TNF-α– or TPA-induced expression of CXCL8 in cultured psoriatic keratinocytes, suggesting that PKCα activity may contribute to psoriatic inflammation. Thus, skin can be the source of circulating factors that have both local and systemic consequences, and these factors, their receptors, and possibly PKCα could be therapeutic targets for inhibition of cutaneous inflammation.

Authors

Christophe Cataisson, Andrea J. Pearson, Margaret Z. Tsien, Francesca Mascia, Ji-Liang Gao, Saveria Pastore, Stuart H. Yuspa

×

Figure 6

Prevention of KC and G-CSF expression by the classical PKC inhibitor Gö 6976.

Options: View larger image (or click on image) Download as PowerPoint
Prevention of KC and G-CSF expression by the classical PKC inhibitor Gö ...
Gö 6976 was applied once topically just prior to TPA treatment. KC and G-CSF expression was quantified in skin extract (A and B, respectively), and levels circulating G-CSF (C) were determined in serum. The control group received the same volume of the solvent. Bars represent the mean ± SEM for 4 animals, and results are representative of 2 independent experiments. *P < 0.05 versus no TPA treatment.
Follow JCI:
Copyright © 2021 American Society for Clinical Investigation
ISSN: 0021-9738 (print), 1558-8238 (online)

Sign up for email alerts