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

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

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)2757-2766
Number of pages10
JournalJournal of Clinical Investigation
Volume116
Issue number10
DOIs
Publication statusPublished - Oct 2 2006

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'CXCR2 ligands and G-CSF mediate PKCα-induced intraepidermal inflammation'. Together they form a unique fingerprint.

  • Cite this

    Cataisson, C., Pearson, A. J., Tsien, M. Z., Mascia, F., Gao, J. L., Pastore, S., & Yuspa, S. H. (2006). CXCR2 ligands and G-CSF mediate PKCα-induced intraepidermal inflammation. Journal of Clinical Investigation, 116(10), 2757-2766. https://doi.org/10.1172/JCI27514