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In Vitro Culture for H5N1-Specific Duck T Cells and Detection of Immune Responses Using Intracellular Cytokine Staining Method
Published on: May 30, 2025
321
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
Summary
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.
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.
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