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Skin commensal Staphylococcus promotes systemic reconfiguration of Vγ6+ γδT cells

GSE294609 Mus musculus Expression profiling by high throughput sequencing 7 samples Submitted 2026/04/01 Platform GPL21103
Summary
Skin-resident Staphylococcus aureus, a common human commensal, can shape systemic immune responses without provoking inflammation in mice. This study demonstrates that topical skin colonization with live S. aureus robustly expands IL-17-producing Vγ6⁺ γδT17 cells both locally in the dermis and across distant tissues, including mucosal, lymphoid, and metabolic organs. This systemic reconfiguration is IL-1R-dependent yet independent of IL-23, TLR2, or the microbiota. Transcriptomic profiling reveals a transitional state in dermal Vγ6⁺ γδT cells, marked by changes in tissue-residency and migration-associated genes. Local proliferation, lymphatic trafficking and long-term recirculation sustain this response, even without systemic bacterial dissemination. These findings uncover a previously unrecognized allostatic process by which localized microbial signals recalibrate systemic immunological setpoints. The study expands our understanding of γδT17 cell dynamics and highlights their potential in tuning organismal fitness.
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Direct links to NCBI, no account and no request form: the whole study as GSE294609_RAW.tar, processed values as the series matrix, the supplementary file directory, and per-sample supplementary files for any of the 7 samples. Raw sequencing reads are also available from ENA.

Also filed as BioProject PRJNA1250602 and SRA study SRP578531. Searching any of these in the dataset finder brings you back here.

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