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Identification of human host proteins contributing to H5N1 influenza virus propagation by membrane proteomics

Cheng Liu1, Anding Zhang, Jing Guo

  • 1State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China.

Journal of Proteome Research
|September 19, 2012
PubMed

Insights

This study identified key host membrane proteins crucial for highly pathogenic avian influenza (HPAI) H5N1 virus infection. Understanding these proteins offers new therapeutic targets for HPAI H5N1 virus.

Area of Science:

  • Virology
  • Proteomics
  • Cell Biology

Background:

  • Highly pathogenic avian influenza (HPAI) H5N1 virus poses a global threat, causing severe disease in humans and animals.
  • As an enveloped virus, H5N1 relies on host cellular membrane proteins for critical life cycle stages like entry, assembly, and budding.

Purpose of the Study:

  • To identify and characterize host cellular membrane proteins involved in H5N1 virus infection.
  • To investigate the role of these identified proteins in viral propagation.

Main Methods:

  • Comparative membrane proteomics using 2-DE coupled with MALDI-TOF/TOF MS to profile membrane proteins in A549 cells during H5N1 infection at different time points (6, 12, 24 h).
  • siRNA technology was employed to validate the function of identified proteins in viral propagation.

Main Results:

  • Forty-two proteins showed altered expression levels in A549 cells post-H5N1 infection, with 57% being membrane or membrane-associated proteins.
  • Complement component C1q binding protein, annexin 2, prohibitin, peroxiredoxin 1, and heat shock protein 90-beta were confirmed to contribute to H5N1 viral propagation.

Conclusions:

  • The study provides novel insights into the function of host membrane proteins during H5N1 viral infection.
  • Identified proteins represent potential targets for developing new therapeutic strategies against H5N1 infection.

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