[PDF][PDF] Single-cell chromatin accessibility landscape identifies tissue repair program in human regulatory T cells

M Delacher, M Simon, L Sanderink, A Hotz-Wagenblatt… - Immunity, 2021 - cell.com
M Delacher, M Simon, L Sanderink, A Hotz-Wagenblatt, M Wuttke, K Schambeck…
Immunity, 2021cell.com
Murine regulatory T (Treg) cells in tissues promote tissue homeostasis and regeneration. We
sought to identify features that characterize human Treg cells with these functions in healthy
tissues. Single-cell chromatin accessibility profiles of murine and human tissue Treg cells
defined a conserved, microbiota-independent tissue-repair Treg signature with a prevailing
footprint of the transcription factor BATF. This signature, combined with gene expression
profiling and TCR fate mapping, identified a population of tissue-like Treg cells in human …
Summary
Murine regulatory T (Treg) cells in tissues promote tissue homeostasis and regeneration. We sought to identify features that characterize human Treg cells with these functions in healthy tissues. Single-cell chromatin accessibility profiles of murine and human tissue Treg cells defined a conserved, microbiota-independent tissue-repair Treg signature with a prevailing footprint of the transcription factor BATF. This signature, combined with gene expression profiling and TCR fate mapping, identified a population of tissue-like Treg cells in human peripheral blood that expressed BATF, chemokine receptor CCR8 and HLA-DR. Human BATF+CCR8+ Treg cells from normal skin and adipose tissue shared features with nonlymphoid T follicular helper-like (Tfh-like) cells, and induction of a Tfh-like differentiation program in naive human Treg cells partially recapitulated tissue Treg regenerative characteristics, including wound healing potential. Human BATF+CCR8+ Treg cells from healthy tissue share features with tumor-resident Treg cells, highlighting the importance of understanding the context-specific functions of these cells.
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