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Related Experiment Video

Updated: Oct 12, 2025

In Vitro Culture for H5N1-Specific Duck T Cells and Detection of Immune Responses Using Intracellular Cytokine Staining Method
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In Vitro Culture for H5N1-Specific Duck T Cells and Detection of Immune Responses Using Intracellular Cytokine Staining Method

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Tissue Specific Transcriptome Changes Upon Influenza A Virus Replication in the Duck.

Lee K Campbell1,2, Ximena Fleming-Canepa1, Robert G Webster3

  • 1Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada.

Frontiers in Immunology
|November 22, 2021
PubMed
Summary
This summary is machine-generated.

Ducks control influenza A virus (IAV) through global and tissue-specific gene expression. This study reveals how ducks manage viral replication and limit inflammation in key tissues.

Keywords:
RNA-seqduck (Anas platrhynchos)highly pathogenic avian influenzaproinflammatory cytokinesreservoir host

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Area of Science:

  • Avian immunology
  • Virology
  • Genomics

Background:

  • Ducks are natural reservoirs for influenza A virus (IAV).
  • Understanding duck immune responses to IAV is crucial for disease control.
  • Mechanisms of viral control, both global and tissue-specific, remain unclear.

Purpose of the Study:

  • To compare gene expression in Pekin ducks infected with different IAV strains (H5N1 and H5N2).
  • To identify global and tissue-specific immune responses to IAV infection in ducks.
  • To elucidate mechanisms of viral control and inflammation modulation in ducks.

Main Methods:

  • RNA-sequencing analysis of duck tissues (lungs, intestines) post-infection.
  • Infection with a highly pathogenic H5N1 strain (VN1203) and a low pathogenic H5N2 strain (BC500).
  • Alignment of reads to the domestic duck genome (Anas platyrhynchos).

Main Results:

  • Highly pathogenic VN1203 replicated in lungs, while low pathogenic BC500 replicated in intestines.
  • VN1203 induced robust gene expression changes throughout infection; BC500 showed peak changes on day 2.
  • Both global and tissue-specific gene expression patterns were observed, with upregulation of pattern recognition receptors and interferon-stimulated genes in replication-focused tissues.
  • Specific downregulation of inflammatory cytokines and leukocyte recruitment pathways occurred in infected lung and intestinal tissues, respectively.

Conclusions:

  • Ducks employ both global and tissue-specific gene regulation to control IAV replication.
  • Localized downregulation of inflammatory responses in key tissues helps prevent damage during IAV infection.
  • These findings provide insights into the innate immune strategies of ducks against influenza A virus.