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    Changes in human dendritic cell number and function in severe obesity may contribute to increased susceptibility to viral infection

    O'Shea, Donal and Corrigan, Michelle and Dunne, Margaret R. and Jackson, Ruaidhri and Woods, Conor and Gaoatswe, Gadintshware and Moynagh, Paul N. and O'Connell, Jean and Hogan, Andrew (2013) Changes in human dendritic cell number and function in severe obesity may contribute to increased susceptibility to viral infection. International Journal of Obesity, 37 (11). pp. 1510-1513. ISSN 0307-0565

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    Dendritic cells (DCs) are key immune sentinels linking the innate and adaptive immune systems. DCs recognise danger signals and initiate T-cell tolerance, memory and polarisation. They are critical cells in responding to a viral illness. Obese individuals have been shown to have an impaired response to vaccinations against virally mediated conditions and to have an increased susceptibility to multi-organ failure in response to viral illness. We investigated if DCs are altered in an obese cohort (mean body mass index 51.7±7.3 kg m(-2)), ultimately resulting in differential T-cell responses. Circulating DCs were found to be significantly decreased in the obese compared with the lean cohort (0.82% vs 2.53%). Following Toll-like receptor stimulation, compared with lean controls, DCs generated from the obese cohort upregulated significantly less CD83 (40% vs 17% mean fluorescence intensity), a molecule implicated in the elicitation of T-cell responses, particularly viral responses. Obese DCs produced twofold more of the immunosuppressive cytokine interleukin (IL)-10 than lean controls, and in turn stimulated fourfold more IL-4-production from allogenic naive T cells. We conclude that obesity negatively impacts the ability of DCs to mature and elicit appropriate T-cell responses to a general stimulus. This may contribute to the increased susceptibility to viral infection observed in severe obesity.

    Item Type: Article
    Keywords: virus infection; vaccination; dendritic cell; T-cell response;
    Academic Unit: Faculty of Science and Engineering > Biology
    Faculty of Science and Engineering > Research Institutes > Institute of Immunology
    Item ID: 8123
    Identification Number:
    Depositing User: Professor Paul Moynagh
    Date Deposited: 05 Apr 2017 13:58
    Journal or Publication Title: International Journal of Obesity
    Publisher: Nature Publshing Group
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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