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Early emergence of T central memory precursors programs clonal dominance during chronic viral infection
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Early emergence of T central memory precursors programs clonal dominance during chronic viral infection
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Journal Article
Early emergence of T central memory precursors programs clonal dominance during chronic viral infection
2020
Overview
Chronic cytomegalovirus (CMV) infection leads to long-term maintenance of extraordinarily large CMV-specific T cell populations. The magnitude of this so-called ‘memory inflation’ is thought to mainly depend on antigenic stimulation during the chronic phase of infection. However, by mapping the long-term development of CD8
+
T cell families derived from single naive precursors, we find that fate decisions made during the acute phase of murine CMV infection can alter the level of memory inflation by more than 1,000-fold. Counterintuitively, a T cell family’s capacity for memory inflation is not determined by its initial expansion. Instead, those rare T cell families that dominate the chronic phase of infection show an early transcriptomic signature akin to that of established T central memory cells. Accordingly, a T cell family’s long-term dominance is best predicted by its early content of T central memory precursors, which later serve as a stem-cell-like source for memory inflation.
T cell memory formation is often described as occurring during the chronic phases of infection. Buchholz and colleagues use the phenomenon of ‘memory inflation’ following cytomegalovirus infection to show that a tiny subset of self-renewing T cells branch off early from the bulk population to generate memory.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
/ Animals
/ Biomedical and Life Sciences
/ Clonal Evolution - immunology
/ Cytomegalovirus - immunology
/ Cytomegalovirus Infections - immunology
/ Cytomegalovirus Infections - virology
/ Host-Pathogen Interactions - immunology
/ Humans
/ Mice
/ Muromegalovirus - immunology
/ T cells
/ T-Lymphocyte Subsets - immunology
/ T-Lymphocyte Subsets - metabolism
/ Testing
