The protein kinase c inhibitor aeb071 (sotrastaurin) modulates migration and superoxide anion production by human neutrophils in vitro

F. Capsoni, A. M. Ongari, E. Reali, F. Bosè, G. F. Altomare

Research output: Contribution to journalArticlepeer-review

Abstract

We examined the effect of the protein kinase C-selective inhibitor AEB071 (sotrastaurin) on neutrophil functions in vitro. Pre-incubation with AEB071 at concentrations similar to those reached during in vivo therapy significantly reduced cell capacity to migrate toward three different chemo-attractants and to produce superoxide anions (O2) in response to phorbol myristate acetate (PMA) or to ./V-formylmethionyl-leucyl-phenylalanine (fMLP). AEB071 also significantly inhibited the O2" overproduction induced by fMLP in neutrophils primed with tumor necrosis factor alpha (TNF-α) or granulocyte/ macrophage-colony stimulating factor (GM-CSF). This inhibition was not linked to fMLP-receptor down-regulation since the drug had no effect on either fMLP-receptors or fMLP-induced CDlIb membrane expression. When the activity of AEB071 was compared to that of the conventional protein kinase C (PKC) inhibitor GÖ6850 (which, like sotrastaurin, inhibits classical and novel PKC isoforms), GÖ6976 (an inhibitor of a and β PKC isoforms) and rottlerin (a prevailing δ PKC isoform inhibitor), AEB071 at an equimolar concentration of 3 μM (close to the maximum drug concentration reached in patients treated with AEB071) caused significantly more inhibition on both chemotactic response and superoxide production. These in vitro findings suggest that neutrophils may offer a cellular target for AEB071 activity in vivo.

Original languageEnglish
Pages (from-to)617-626
Number of pages10
JournalInternational Journal of Immunopathology and Pharmacology
Volume25
Issue number3
Publication statusPublished - Jul 2012

Keywords

  • Chemotaxis
  • Inflammation
  • Oxygen radicals
  • Phagocytes

ASJC Scopus subject areas

  • Pharmacology
  • Immunology
  • Immunology and Allergy

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