Peripheral and lung resident memory T cell responses against SARS-CoV-2

Nat Commun. 2021 May 21;12(1):3010. doi: 10.1038/s41467-021-23333-3.

Abstract

Resident memory T cells (TRM) positioned within the respiratory tract are probably required to limit SARS-CoV-2 spread and COVID-19. Importantly, TRM are mostly non-recirculating, which reduces the window of opportunity to examine these cells in the blood as they move to the lung parenchyma. Here, we identify circulating virus-specific T cell responses during acute infection with functional, migratory and apoptotic patterns modulated by viral proteins and associated with clinical outcome. Disease severity is associated predominantly with IFNγ and IL-4 responses, increased responses against S peptides and apoptosis, whereas non-hospitalized patients have increased IL-12p70 levels, degranulation in response to N peptides and SARS-CoV-2-specific CCR7+ T cells secreting IL-10. In convalescent patients, lung-TRM are frequently detected even 10 months after initial infection, in which contemporaneous blood does not reflect tissue-resident profiles. Our study highlights a balanced anti-inflammatory antiviral response associated with a better outcome and persisting TRM cells as important for future protection against SARS-CoV-2 infection.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis / immunology
  • CD4-Positive T-Lymphocytes / immunology
  • CD4-Positive T-Lymphocytes / metabolism
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / metabolism
  • COVID-19 / immunology*
  • COVID-19 / virology
  • Cell Movement / immunology
  • Humans
  • Immunologic Memory / immunology*
  • Interferon-gamma / immunology
  • Interferon-gamma / metabolism
  • Interleukin-4 / immunology
  • Interleukin-4 / metabolism
  • Lung / immunology*
  • Lung / virology
  • SARS-CoV-2 / immunology*
  • SARS-CoV-2 / physiology
  • T-Lymphocytes / immunology*
  • T-Lymphocytes / metabolism

Substances

  • Interleukin-4
  • Interferon-gamma