This study examines the extent to which memory CD4+ T cells share immunosurveillance strategies with CD8+ resident memory T cells (TRM). After acute viral infection, memory CD4+ T cells predominantly used residence to survey nonlymphoid tissues, albeit not as stringently as observed for CD8+ T cells. In contrast, memory CD4+ T cells were more likely to be resident within lymphoid organs than CD8+ T cells. Migration properties of memory-phenotype CD4+ T cells in non-SPF parabionts were similar, generalizing these results to diverse infections and conditions. CD4+ and CD8+ TRM shared overlapping transcriptional signatures and location-specific features, such as granzyme B expression in the small intestine, revealing tissue-specific and migration property–specific, in addition to lineage-specific, differentiation programs. Functionally, mucosal CD4+ TRM reactivation locally triggered both chemokine expression and broad immune cell activation. Thus, residence provides a dominant mechanism for regionalizing CD4+ T cell immunity, and location enforces shared transcriptional, phenotypic, and functional properties with CD8+ T cells.
CD4+ resident memory T cells dominate immunosurveillance and orchestrate local recall responses
Lalit K. Beura,Nancy J. Fares-Frederickson,Elizabeth M. Steinert,M. Scott,E. Thompson,Kathryn A. Fraser,J. Schenkel,V. Vezys,D. Masopust
Published 2019 in Journal of Experimental Medicine
ABSTRACT
PUBLICATION RECORD
- Publication year
2019
- Venue
Journal of Experimental Medicine
- Publication date
2019-03-28
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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