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CXCL5 into the upper airways of children with influenza A virus infection

Annett Duemmler1, Aurea Rosalía Montes-Vizuet, Julio Santiago Cruz

  • 1University of Bremen, Germany.

Revista Medica Del Instituto Mexicano Del Seguro Social
|January 4, 2011
PubMed

Insights

Elevated levels of chemokine CXCL5 (also known as ENA-78) were observed in children with influenza, indicating its role in neutrophil recruitment during respiratory infections.

Area of Science:

  • Immunology
  • Virology
  • Respiratory Medicine

Background:

  • Neutrophil infiltration is a key aspect of influenza pathogenesis.
  • The precise regulators of neutrophil influx during influenza remain unclear.
  • Chemokine CXCL5/ENA-78 is a known neutrophil chemoattractant implicated in inflammatory conditions.

Purpose of the Study:

  • To investigate the release of CXCL5 in children experiencing natural influenza infection.
  • To understand the role of CXCL5 in the context of influenza-induced respiratory symptoms.

Main Methods:

  • CXCL5 concentration was measured using an immunoenzyme assay.
  • Samples were collected from nasal aspirates of children diagnosed with influenza A.
  • Comparisons were made between symptomatic and asymptomatic periods in the same children.

Main Results:

  • CXCL5 levels were significantly higher in symptomatic children compared to their asymptomatic state (1850 pg/mL vs. 30 pg/mL).
  • Purified CXCL5 from patient samples demonstrated neutrophil chemotactic activity in vitro.
  • These findings provide the first in vivo evidence for CXCL5's role in influenza.

Conclusions:

  • CXCL5 plays a significant role in neutrophil influx during proven upper respiratory influenza infections.
  • CXCL5 may represent a potential therapeutic target for influenza-related respiratory diseases.
Abstract

Keywords:
influenza, humaninfluenza A virus, H1N1subtypeneutrophilschemokines

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