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Interferon-γ couples CD8+ T cell avidity and differentiation during infection.
- Source :
- Nature Communications; 10/23/2023, Vol. 14 Issue 1, p1-17, 17p
- Publication Year :
- 2023
-
Abstract
- Effective responses to intracellular pathogens are characterized by T cell clones with a broad affinity range for their cognate peptide and diverse functional phenotypes. How T cell clones are selected throughout the response to retain a breadth of avidities remains unclear. Here, we demonstrate that direct sensing of the cytokine IFN-γ by CD8<superscript>+</superscript> T cells coordinates avidity and differentiation during infection. IFN-γ promotes the expansion of low-avidity T cells, allowing them to overcome the selective advantage of high-avidity T cells, whilst reinforcing high-avidity T cell entry into the memory pool, thus reducing the average avidity of the primary response and increasing that of the memory response. IFN-γ in this context is mainly provided by virtual memory T cells, an antigen-inexperienced subset with memory features. Overall, we propose that IFN-γ and virtual memory T cells fulfil a critical immunoregulatory role by enabling the coordination of T cell avidity and fate. Although IFN-γ is known to regulate T cell function and expansion during virus-specific responses, its impact on T cells with varying avidity for antigen remains unclear. Here, the authors demonstrate that IFN-γ promotes the expansion of low-avidity CD8<superscript>+</superscript> T cells during the effector phase, but favours those with high avidity in the memory pool. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 173149672
- Full Text :
- https://doi.org/10.1038/s41467-023-42455-4