CD8αβ+ γδ T cells: A novel T cell subset with a potential role in inflammatory bowel disease

Research output: Contribution to journalArticle

Abstract

γδ T cells have been attributed a wide variety of functions, which in some cases may appear as contradictory. To better understand the enigmatic biology of γδ T cells it is crucial to define the constituting subpopulations. γδ T cells have previously been categorized into two subpopulations: CD8aa+ and CD8- cells. In this study we have defined and characterized a novel subset of human γδ T-cells expressing CD8ab. These CD8αβ+ γδ T cells differed from the previously described γδ T cell subsets in several aspects, including the degree of enrichment within the gut mucosa, the activation status in blood, the type of TCRd variant used in blood, and small but significant differences in their response to IL-2 stimulation. Furthermore, the novel subset expressed cytotoxic mediators and CD69, and produced IFN-γ and TNF-α. In patients with active inflammatory bowel disease the mucosal frequencies of CD8αβ+ γδ T cells were significantly lower as compared with healthy controls, correlated negatively with the degree of disease activity, and increased to normal levels as a result of anti-TNF-a therapy. In conclusion, our results demonstrate that CD8αβ+ γδ T cells constitute a novel lymphocyte subset, which is strongly enriched within the gut and may play an important role in gut homeostasis and mucosal healing in inflammatory bowel disease.

Details

Authors
Organisations
External organisations
  • Skåne University Hospital
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Immunology in the medical area
  • Cell and Molecular Biology
  • Gastroenterology and Hepatology
Original languageEnglish
Pages (from-to)4584-4592
Number of pages9
JournalJournal of Immunology
Volume197
Issue number12
Publication statusPublished - 2016 Dec 15
Publication categoryResearch
Peer-reviewedYes

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