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Magnitude and kinetics of T cell and antibody responses during H1N1pdm09 infection in inbred Babraham pigs and outbred pigs

Edmans, Matthew, McNee, Adam, Porter, Emily, Vatzia, Eleni, Paudyal, Basu, Martini, Veronica, Gubbins, Simon, Francis, Ore, Harley, Ross, Thomas, Amy, Burt, Rachel, Morgan, Sophie, Fuller, Anna, Sewell, Andrew ORCID:, Charleston, Bryan, Bailey, Mick and Tchilian, Elma 2021. Magnitude and kinetics of T cell and antibody responses during H1N1pdm09 infection in inbred Babraham pigs and outbred pigs. Frontiers in Immunology 11 , 604913. 10.3389/fimmu.2020.604913

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We have used the pig, a large natural host animal for influenza with many physiological similarities to humans, to characterize αβ, γδ T cell and antibody (Ab) immune responses to the 2009 pandemic H1N1 virus infection. We evaluated the kinetic of virus infection and associated response in inbred Babraham pigs with identical MHC (Swine Leucocyte Antigen) and compared them to commercial outbred animals. High level of nasal virus shedding continued up to days 4 to 5 post infection followed by a steep decline and clearance of virus by day 9. Adaptive T cell and Ab responses were detectable from days 5 to 6 post infection reaching a peak at 9 to 14 days. γδ T cells produced cytokines ex vivo at day 2 post infection, while virus reactive IFNγ producing γδ T cells were detected from day 7 post infection. Analysis of NP tetramer specific and virus specific CD8 and CD4 T cells in blood, lung, lung draining lymph nodes, and broncho-alveolar lavage (BAL) showed clear differences in cytokine production between these tissues. BAL contained the most highly activated CD8, CD4, and γδ T cells producing large amounts of cytokines, which likely contribute to elimination of virus. The weak response in blood did not reflect the powerful local lung immune responses. The immune response in the Babraham pig following H1N1pdm09 influenza infection was comparable to that of outbred animals. The ability to utilize these two swine models together will provide unparalleled power to analyze immune responses to influenza.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Additional Information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).
Publisher: Frontiers Media
ISSN: 1664-3224
Date of First Compliant Deposit: 3 March 2021
Date of Acceptance: 15 December 2020
Last Modified: 06 May 2023 09:24

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