Medical Microbiology and Immunology

, Volume 199, Issue 4, pp 291–297

Glycyrrhizin inhibits highly pathogenic H5N1 influenza A virus-induced pro-inflammatory cytokine and chemokine expression in human macrophages

Authors

  • Martin Michaelis
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Janina Geiler
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Patrizia Naczk
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Patchima Sithisarn
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Henry Ogbomo
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Behric Altenbrandt
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Anke Leutz
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
  • Hans Wilhelm Doerr
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
    • Institut für Medizinische VirologieKlinikum der J.W. Goethe-Universität
Original Investigation

DOI: 10.1007/s00430-010-0155-0

Cite this article as:
Michaelis, M., Geiler, J., Naczk, P. et al. Med Microbiol Immunol (2010) 199: 291. doi:10.1007/s00430-010-0155-0

Abstract

Hypercytokinaemia is thought to contribute to highly pathogenic H5N1 influenza A virus disease. Glycyrrhizin is known to exert immunomodulatory and anti-inflammatory effects and therefore a candidate drug for the control of H5N1-induced pro-inflammatory gene expression. Here, the effects of an approved parenteral glycyrrhizin preparation were investigated on H5N1 virus replication, H5N1-induced pro-inflammatory responses, and H5N1-induced apoptosis in human monocyte-derived macrophages. Glycyrrhizin 100 μg/ml, a therapeutically achievable concentration, impaired H5N1-induced production of CXCL10, interleukin 6, and CCL5 and inhibited H5N1-induced apoptosis but did not interfere with H5N1 replication. Global inhibition of immune responses may result in the loss of control of virus replication by cytotoxic immune cells including natural killer cells and cytotoxic CD8+ T-lymphocytes. Notably, glycyrrhizin concentrations that inhibited H5N1-induced pro-inflammatory gene expression did not affect cytolytic activity of natural killer cells. Since H5N1-induced hypercytokinaemia is considered to play an important role within H5N1 pathogenesis, glycyrrhizin may complement the arsenal of potential drugs for the treatment of H5N1 disease.

Keywords

GlycyrrhizinH5N1CytokinesMonocyte-derived macrophages

Copyright information

© Springer-Verlag 2010