| Title | Epidermal Resident Memory T Cell Fitness Requires Antigen Encounter in the Skin. |
| Publication Type | Journal Article |
| Year of Publication | 2025 |
| Authors | Weiss ES, Hirai T, Li H, Liu A, Baker S, Magill I, Gillis J, Zhang YR, Ramcke T, Kurihara K, Masopust D, Anandasabapathy N, Singh H, Zemmour D, Mackay LK, Kaplan DH |
| Corporate Authors | ImmGen Consortium OpenSource T cell Project |
| Journal | bioRxiv |
| Date Published | 2025 Jul 09 |
| ISSN | 2692-8205 |
| Abstract | CD8+ tissue resident memory T cells (TRM) develop from effectors that seed peripheral tissues where they persist providing defense against subsequent challenges. TRM persistence requires autocrine TGFβ transactivated by integrins expressed on keratinocytes. TRM precursors that encounter antigen in the epidermis during development outcompete bystander TRM for TGFβ resulting in enhanced persistence. ScRNA-seq analysis of epidermal TRM revealed that local antigen experience in the skin resulted in an enhanced differentiation signature in comparison with bystanders. Upon recall, TRM displayed greater proliferation dictated by affinity of antigen experienced during epidermal development. Finally, local antigen experienced TRM differentially expressed TGFβRIII, which increases avidity of the TGFβRI/II receptor complex for TGFβ. Selective ablation of Tgfbr3 reduced local antigen experienced TRM capacity to persist, rendering them phenotypically like bystander TRM. Thus, antigen driven TCR signaling in the epidermis during TRM differentiation results in a lower TGFβ requirement for persistence and increased proliferative capacity that together enhance epidermal TRM fitness. |
| DOI | 10.1101/2025.03.31.646438 |
| Alternate Journal | bioRxiv |
| PubMed ID | 40236062 |
| PubMed Central ID | PMC11996394 |
| Grant List | T32 AI060525 / AI / NIAID NIH HHS / United States R01 AR060744 / AR / NIAMS NIH HHS / United States T32 AI089443 / AI / NIAID NIH HHS / United States R01 AR080436 / AR / NIAMS NIH HHS / United States R01 AR083208 / AR / NIAMS NIH HHS / United States |
