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Immune response to seasonal influenza A virus infection: a proteomic approach

Luis M Teran1, Sabrina Rüggeberg, Julio Santiago

  • 1Department of Immunogenetics and Allergy, National Institute of Respiratory Diseases, México, D.F., Mexico. lmteran@iner.gob.mx

Archives of Medical Research
|September 11, 2012
PubMed

Insights

Influenza virus infection alters nasal secretions in children. This study identified specific proteins upregulated during flu, offering new insights into how influenza causes respiratory illness.

Area of Science:

  • Proteomics
  • Virology
  • Immunology

Background:

  • Influenza viruses cause significant respiratory illness and economic burden.
  • The precise mechanisms of influenza pathogenesis remain incompletely understood.

Purpose of the Study:

  • To investigate the proteomic differences in nasal secretions of children infected with seasonal influenza A virus compared to healthy controls.
  • To identify specific proteins associated with influenza infection in pediatric patients.

Main Methods:

  • Nasal aspirates from 12 children with influenza A symptoms were analyzed using two-dimensional electrophoresis (2-DE).
  • Control samples were collected from the same children when asymptomatic.
  • Differentially expressed protein spots were identified using mass spectrometry.

Main Results:

  • Eight protein spots showed differential expression between infected and healthy states.
  • Ten proteins were upregulated in children with influenza A, including PLUNC, cystatins (S and SA), S100A9, lipocalin 1 fragments, and immunoglobulin fragments.
  • Specific protein fragments from lactotransferrin and immunoglobulins (kappa and lambda) were also identified.

Conclusions:

  • The proteomic composition of nasal secretions differs significantly between children with influenza A virus infection and healthy children.
  • These findings enhance our understanding of the pathogenesis of seasonal influenza A virus respiratory infections.
Abstract

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