Title | Skin CD4+ memory T cells exhibit combined cluster-mediated retention and equilibration with the circulation |
Publication Type | Journal Article |
Year of Publication | 2016 |
Authors | Collins N, Jiang X, Zaid A, Macleod BL, Li J, Park COok, Haque A, Bedoui S, Heath WR, Mueller SN, Kupper TS, Gebhardt T, Carbone FR |
Journal | Nature Communications |
Volume | 7 |
Issue | 1 |
Date Published | 05/2016 |
Abstract | Although memory T cells within barrier tissues can persist as permanent residents, at least some exchange with blood. The extent to which this occurs is unclear. Here we show that memory CD4+ T cells in mouse skin are in equilibrium with the circulation at steady state. These cells are dispersed throughout the inter-follicular regions of the dermis and form clusters with antigen presenting cells around hair follicles. After infection or administration of a contact sensitizing agent, there is a sustained increase in skin CD4+ T-cell content, which is confined to the clusters, with a concomitant CCL5-dependent increase in CD4+ T-cell recruitment. Skin CCL5 is derived from CD11b+ cells and CD8+ T cells, with the elimination of the latter decreasing CD4+ T-cell numbers. These results reveal a complex pattern of tissue-retention and equilibration for CD4+ memory T cells in skin, which is altered by infection and inflammation history. |
URL | https://www.nature.com/articles/ncomms11514?origin=ppub |
DOI | 10.1038/ncomms11514 |