Journal
IMMUNOLOGICAL REVIEWS
Volume 316, Issue 1, Pages 104-119Publisher
WILEY
DOI: 10.1111/imr.13213
Keywords
adaptive barrier immunity; allergy; cutaneous T-cell lymphoma; inflammatory skin diseases; skin cancer; tissue-resident memory T cells
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The human skin contains a diverse population of memory T cells, which can quickly respond to pathogens and cancer antigens. Tissue-resident memory T cells (T-RM) have been linked to various allergic, autoimmune, and inflammatory skin diseases. The clonal expansion of T-RM cells is also known to contribute to cutaneous T-cell lymphoma. This review article discusses the phenotypes, transcriptional programs, and effector functions of skin T-RM cells, summarizes recent studies on T-RM formation, longevity, plasticity, and retrograde migration, and contextualizes the findings in relation to skin homeostasis and altered functions in skin disease.
The human skin is populated by a diverse pool of memory T cells, which can act rapidly in response to pathogens and cancer antigens. Tissue-resident memory T cells (T-RM) have been implicated in range of allergic, autoimmune and inflammatory skin diseases. Clonal expansion of cells with T-RM properties is also known to contribute to cutaneous T-cell lymphoma. Here, we review the heterogeneous phenotypes, transcriptional programs, and effector functions of skin T-RM. We summarize recent studies on T-RM formation, longevity, plasticity, and retrograde migration and contextualize the findings to skin T-RM and their role in maintaining skin homeostasis and altered functions in skin disease.
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