Prevention of respiratory virus transmission by resident memory CD8+ T cells

• Published in: Nature (London) 2024-02, Vol.626 (7998), p.392-400
• Main Authors: Uddbäck, Ida, Michalets, Sarah E., Saha, Ananya, Mattingly, Cameron, Kost, Kirsten N., Williams, M. Elliott, Lawrence, Laurel A., Hicks, Sakeenah L., Lowen, Anice C., Ahmed, Hasan, Thomsen, Allan R., Russell, Charles J., Scharer, Christopher D., Boss, Jeremy M., Koelle, Katia, Antia, Rustom, Christensen, Jan P., Kohlmeier, Jacob E.
• Format: Article
• Language: English
• Subjects: 13/31; 45/91; 59/5; 631/250/255/2514; 631/250/347; 64/60; Aerosols; Animals; Antibodies; Bioluminescence; CD8 antigen; CD8-Positive T-Lymphocytes - immunology; Disease control; Disease Models, Animal; Epithelial cells; Epithelial Cells - immunology; Epithelial Cells - metabolism; Epithelium; Herd immunity; Humanities and Social Sciences; Humans; Humoral immunity; Immunity, Herd - immunology; Immunologic Memory - immunology; Immunological memory; Infections; Influenza; Interferon-gamma - immunology; Laboratories; Lymphocytes; Lymphocytes T; Memory cells; Memory T Cells - immunology; Mice; multidisciplinary; Parainfluenza; Paramyxoviridae - immunology; Paramyxoviridae - physiology; Paramyxoviridae Infections - immunology; Paramyxoviridae Infections - prevention & control; Paramyxoviridae Infections - transmission; Paramyxoviridae Infections - virology; Respiratory System - cytology; Respiratory System - immunology; Respiratory System - virology; Respiratory tract; Science; Science (multidisciplinary); Transcription, Genetic; Vaccines; Vector-borne diseases; Viral diseases; Viruses; Yellow fever; γ-Interferon
• ISSN: 0028-0836; 1476-4687; 1476-4687
• DOI: 10.1038/s41586-023-06937-1

An ideal vaccine both attenuates virus growth and disease in infected individuals and reduces the spread of infections in the population, thereby generating herd immunity. Although this strategy has proved successful by generating humoral immunity to measles, yellow fever and polio, many respiratory viruses evolve to evade pre-existing antibodies 1 . One approach for improving the breadth of antiviral immunity against escape variants is through the generation of memory T cells in the respiratory tract, which are positioned to respond rapidly to respiratory virus infections 2 – 6 . However, it is unknown whether memory T cells alone can effectively surveil the respiratory tract to the extent that they eliminate or greatly reduce viral transmission following exposure of an individual to infection. Here we use a mouse model of natural parainfluenza virus transmission to quantify the extent to which memory CD8 + T cells resident in the respiratory tract can provide herd immunity by reducing both the susceptibility of acquiring infection and the extent of transmission, even in the absence of virus-specific antibodies. We demonstrate that protection by resident memory CD8 + T cells requires the antiviral cytokine interferon-γ (IFNγ) and leads to altered transcriptional programming of epithelial cells within the respiratory tract. These results suggest that tissue-resident CD8 + T cells in the respiratory tract can have important roles in protecting the host against viral disease and limiting viral spread throughout the population. Experiments in a mouse model of natural parainfluenza virus transmission show that tissue-resident memory T cells in the respiratory tract have important interferon-γ-dependent roles in protection against and limiting the transmission of viral disease.