Journal
NATURE IMMUNOLOGY
Volume 7, Issue 8, Pages 843-850Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ni1363
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Funding
- NIAMS NIH HHS [P30-AR041942, R01-AR49282] Funding Source: Medline
- Wellcome Trust [071534] Funding Source: Medline
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Intraepithelial lymphocytes constitute a group of T cells that express mainly monospecific or oligoclonal T cell receptors (TCRs). Like adaptive TCR alpha beta(+) T cells, intraepithelial lymphocytes, a subset enriched in TCR gamma delta(+) T cells, are proposed to be positively selected by thymically expressed self agonists, yet no direct evidence for this exists at present. Mouse dendritic epidermal T cells are prototypic intraepithelial lymphocytes, displaying an almost monoclonal TCR gamma delta(+) repertoire. Here we describe an FVB substrain of mice in which this repertoire was uniquely depleted, resulting in cutaneous pathology. This phenotype was due to failure of dendritic epidermal T cell progenitors to mature because of a heritable defect in a dominant gene used by the thymic stroma to 'educate' the natural, skin- associated intraepithelial lymphocyte repertoire to be of physiological use.
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