Divergent molecular networks program functionally distinct CD8+ skin-resident memory T cells.

TitleDivergent molecular networks program functionally distinct CD8+ skin-resident memory T cells.
Publication TypeJournal Article
Year of Publication2023
AuthorsPark, SL, Christo, SN, Wells, AC, Gandolfo, LC, Zaid, A, Alexandre, YO, Burn, TN, Schröder, J, Collins, N, Han, S-J, Guillaume, SM, Evrard, M, Castellucci, C, Davies, B, Osman, M, Obers, A, McDonald, KM, Wang, H, Mueller, SN, Kannourakis, G, Berzins, SP, Mielke, LA, Carbone, FR, Kallies, A, Speed, TP, Belkaid, Y, Mackay, LK
JournalScience
Volume382
Issue6674
Pagination1073-1079
Date Published2023 Dec
ISSN1095-9203
KeywordsCD8-Positive T-Lymphocytes, Humans, Immunologic Memory, Inducible T-Cell Co-Stimulator Ligand, Interleukin-7, Memory T Cells, Proto-Oncogene Proteins c-maf, Skin, Th17 Cells
Abstract

Skin-resident CD8+ T cells include distinct interferon-γ-producing [tissue-resident memory T type 1 (TRM1)] and interleukin-17 (IL-17)-producing (TRM17) subsets that differentially contribute to immune responses. However, whether these populations use common mechanisms to establish tissue residence is unknown. In this work, we show that TRM1 and TRM17 cells navigate divergent trajectories to acquire tissue residency in the skin. TRM1 cells depend on a T-bet-Hobit-IL-15 axis, whereas TRM17 cells develop independently of these factors. Instead, c-Maf commands a tissue-resident program in TRM17 cells parallel to that induced by Hobit in TRM1 cells, with an ICOS-c-Maf-IL-7 axis pivotal to TRM17 cell commitment. Accordingly, by targeting this pathway, skin TRM17 cells can be ablated without compromising their TRM1 counterparts. Thus, skin-resident T cells rely on distinct molecular circuitries, which can be exploited to strategically modulate local immunity.

DOI10.1126/science.adi8885
Alternate JournalScience
PubMed ID38033053