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Sökning: WFRF:(Sverremark E)

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  • Fergusson, J. R., et al. (författare)
  • CD161(int)CD8+T cells : a novel population of highly functional, memory CD8+T cells enriched within the gut
  • 2016
  • Ingår i: Mucosal Immunology. - : Elsevier BV. - 1933-0219 .- 1935-3456. ; 9:2, s. 401-413
  • Tidskriftsartikel (refereegranskat)abstract
    • The C-type lectin-like receptor CD161 is expressed by lymphocytes found in human gut and liver, as well as blood, especially natural killer (NK) cells, T helper 17 (Th17) cells, and a population of unconventional Tcells known as mucosalassociated invariant T (MAIT) cells. The association of high CD161 expression with innate T-cell populations including MAITcells is established. Here we show that CD161 is also expressed, at intermediate levels, on a prominent subset of polyclonal CD8+ T cells, including antiviral populations that display a memory phenotype. These memory CD161(int)CD8+ Tcells are enriched within the colon and express both CD103 and CD69, markers associated with tissue residence. Furthermore, this population was characterized by enhanced polyfunctionality, increased levels of cytotoxic mediators, and high expression of the transcription factors T-bet and eomesodermin (EOMES). Such populations were induced by novel vaccine strategies based on adenoviral vectors, currently in trial against hepatitis C virus. Thus, intermediate CD161 expression marks potent polyclonal, polyfunctional tissue-homing CD8+ T-cell populations in humans. As induction of such responses represents a major aim of T-cell prophylactic and therapeutic vaccines in viral disease and cancer, analysis of these populations could be of value in the future.
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  • Fergusson, Joannah R., et al. (författare)
  • CD161 Defines a Transcriptional and Functional Phenotype across Distinct Human T Cell Lineages
  • 2014
  • Ingår i: Cell Reports. - : Elsevier BV. - 2211-1247. ; 9:3, s. 1075-1088
  • Tidskriftsartikel (refereegranskat)abstract
    • The C-type lectin CD161 is expressed by a large proportion of human T lymphocytes of all lineages, including a population known as mucosal-associated invariant T (MAIT) cells. To understand whether different T cell subsets expressing CD161 have similar properties, we examined these populations in parallel using mass cytometry and mRNA microarray approaches. The analysis identified a conserved CD161++/MAIT cell transcriptional signature enriched in CD161+CD8+ T cells, which can be extended to CD161+ CD4+ and CD161+TCR gamma delta+ T cells. Furthermore, this led to the identification of a shared innate-like, TCR-independent response to interleukin (IL)-12 plus IL-18 by different CD161-expressing T cell populations. This response was independent of regulation by CD161, which acted as a costimulatory molecule in the context of T cell receptor stimulation. Expression of CD161 hence identifies a transcriptional and functional phenotype, shared across human T lymphocytes and independent of both T cell receptor (TCR) expression and cell lineage.
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  • Resultat 1-10 av 46

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