Neutrophil-Derived Hyperresistinemia in Severe Acute Streptococcal Infections

Research output: Contribution to journalArticle

Abstract

The concept of neutrophil activation and degranulation as important contributors to disease pathology in invasive group A streptococcal infections has recently been emphasized. This study focuses on two of the most severe streptococcal manifestations, toxic shock syndrome and necrotizing fasciitis, and the newly described proinflammatory molecule resistin, known to derive from adipocytes and monocytes. We demonstrate for the first time that these conditions are characterized by hyperresistinemia in circulation as well as at the local site of infection. Importantly, analyses of patient tissue biopsies and whole blood revealed that neutrophils represent a novel and dominant source of resistin in bacterial septic shock. This was confirmed by the identification of resistin within neutrophil azurophilic granules. In vitro assays using primary neutrophils showed that resistin release was readily triggered by streptococcal cell wall components and by the streptococcal M1 protein, but not by the potent streptococcal superantigens. This is the first report demonstrating that resistin is released from neutrophils in response to microbial stimuli, which adds resistin to the neutrophil granule proteins that are likely to contribute to the pathologic inflammatory responses associated with severe streptococcal infections. The Journal of Immunology, 2009, 183: 4047-4054.

Details

Authors
  • Linda Johansson
  • Anna Linner
  • Jonas Sunden-Cullberg
  • Axana Haggar
  • Heiko Herwald
  • Karin Lore
  • Carl-Johan Treutiger
  • Anna Norrby-Teglund
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Immunology in the medical area
Original languageEnglish
Pages (from-to)4047-4054
JournalJournal of Immunology
Volume183
Issue number6
Publication statusPublished - 2009
Publication categoryResearch
Peer-reviewedYes