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Testosterone treatment of aged male mice improves some but not all aspects of age-associated increases in influenza severity

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  • Testosterone treatment of aged male mice improves some but not all aspects of age-associated increases in influenza severity

    Cell Immunol. 2019 Sep 14:103988. doi: 10.1016/j.cellimm.2019.103988. [Epub ahead of print]
    Testosterone treatment of aged male mice improves some but not all aspects of age-associated increases in influenza severity.

    Vom Steeg LG1, Attreed SE2, Zirkin B3, Klein SL4.
    Author information

    1 W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. 2 Department of Environmental Health and Engineering, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. 3 Department of Biochemistry and Molecular Biology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. 4 W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Biochemistry and Molecular Biology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. Electronic address: sklein2@jhu.edu.

    Abstract

    The severity of influenza increases with age, with worse disease in aged males than females. Testosterone concentrations decline with age in males, which may impact influenza pathogenesis. Aged male mice were treated with testosterone or placebo and outcomes during influenza A virus (IAV) infection were compared with adult male mice. Aged males experienced greater morbidity and mortality than adult males, which was partially improved by testosterone treatment of aged males. Aged males cleared IAV from lungs slower than adult males, regardless of testosterone treatment. As compared with adult males, aged males experienced pulmonary, but not systemic, cytokine dysregulation, and delayed influx and contraction of IAV-specific CD8+ T cells in the lungs. Testosterone treatment in aged males partially restored pulmonary cytokine responses to levels consistent with adult males but did not alter the age-associated changes in IAV-specific CD8+ T cells. Testosterone only modestly improves outcomes of influenza in aged males.
    Copyright 2019 Elsevier Inc. All rights reserved.


    KEYWORDS:

    2009 H1N1; Androgens; CD8+ T cells; Resistance; Tolerance

    PMID: 31540670 DOI: 10.1016/j.cellimm.2019.103988
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