Developmental Origin Governs CD8+ T Cell Fate Decisions during Infection

Publication date: Available online 14 June 2018 Source:Cell Author(s): Norah L. Smith, Ravi K. Patel, Arnold Reynaldi, Jennifer K. Grenier, Jocelyn Wang, Neva B. Watson, Kito Nzingha, Kristel J. Yee Mon, Seth A. Peng, Andrew Grimson, Miles P. Davenport, Brian D. Rudd Heterogeneity is a hallmark feature of the adaptive immune system in vertebrates. Following infection, naive T cells differentiate into various subsets of effector and memory T cells, which help to eliminate pathogens and maintain long-term immunity. The current model suggests there is a single lineage of naive T cells that give rise to different populations of effector and memory T cells depending on the type and amounts of stimulation they encounter during infection. Here, we have discovered that multiple sub-populations of cells exist in the naive CD8+ T cell pool that are distinguished by their developmental origin, unique transcriptional profiles, distinct chromatin landscapes, and different kinetics and phenotypes after microbial challenge. These data demonstrate that the naive CD8+ T cell pool is not as homogeneous as previously thought and offers a new framework for explaining the remarkable heterogeneity in the effector and memory T cell subsets that arise after infection. Graphical abstract Teaser The discovery of multiple sub-populations of naive T cells, distinguished by their developmental origin and molecular profiles prior to microbial challenge, explains the heterogeneity obs...
Source: Cell - Category: Cytology Source Type: research
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