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Lipidomics identifies a requirement for peroxisomal function during influenza virus replication.

Lukas Bahati Tanner1, Charmaine Chng2, Xue Li Guan3

  • 1Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456 NUS Graduate School for Integrative Sciences and Engineering (NGS), National University of Singapore, Singapore 117456.

Journal of Lipid Research
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Summary

Influenza virus utilizes host cell ether lipid metabolism for replication. Targeting peroxisomal pathways and ether lipids impairs influenza virus production, revealing a unique viral signature.

Keywords:
biochemistryether lipidsglycerophospholipidslipid metabolismsphingolipidssystems biology

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Area of Science:

  • Virology
  • Cell Biology
  • Biochemistry

Background:

  • Influenza virus replication depends on host cell lipids for its envelope.
  • The specific role of host lipid metabolism in influenza virus infection remains unclear.
  • Understanding host-lipid interactions is crucial for antiviral strategies.

Purpose of the Study:

  • To investigate the dynamics of host membrane lipids during influenza virus infection.
  • To identify specific lipid signatures associated with influenza virions.
  • To determine the impact of modulating lipid metabolism on viral production.

Main Methods:

  • Mass spectrometry-based lipidomics on infected human lung epithelial cells and purified influenza virions.
  • Pharmacological and genetic manipulation of peroxisomal and ether lipid metabolism.
  • Integration of lipidomics data with genomics and proteomics datasets.

Main Results:

  • Influenza virions exhibit enrichment of peroxisome-derived ether-linked phosphatidylcholines, a unique signature.
  • Interference with peroxisomal and ether lipid metabolism significantly impaired influenza virus production.
  • Altered peroxisomal lipid metabolism is a conserved hallmark of influenza infection in vitro and in vivo.

Conclusions:

  • Influenza virus infection alters host cell peroxisomal lipid metabolism.
  • Ether-linked lipids and peroxisomal pathways are critical for efficient influenza virus replication.
  • Targeting these host lipid pathways presents a potential antiviral strategy.