NDLI: Identification of Novel γδ T-Cell Subsets following Bacterial Infection in the Absence of Vγ1+ T Cells: Homeostatic Control of γδ T-Cell Responses to Pathogen Infection by Vγ1+ T Cells

Content Provider	PubMed Central
Author	Newton, Darren J. Andrew, Elizabeth M. Dalton, Jane E. Mears, Rainy Carding, Simon R.
Copyright Year	2006
Abstract	Although γδ T cells are a common feature of many pathogen-induced immune responses, the factors that influence, promote, or regulate the response of individual γδ T-cell subsets to infection is unknown. Here we show that in the absence of Vγ1+ T cells, novel subsets of γδ T cells, expressing T-cell receptor (TCR)-Vγ chains that normally define TCRγδ+ dendritic epidermal T cells (DETCs) (Vγ5+), intestinal intraepithelial lymphocytes (iIELs) (Vγ7+), and lymphocytes associated with the vaginal epithelia (Vγ6+), are recruited to the spleen in response to bacterial infection in TCR-Vγ1−/− mice. By comparison of phenotype and structure of TCR-Vγ chains and/or -Vδ chains expressed by these novel subsets with those of their epithelium-associated counterparts, the Vγ6+ T cells elicited in infected Vγ1−/− mice were shown to be identical to those found in the reproductive tract, from where they are presumably recruited in the absence of Vγ1+ T cells. By contrast, Vγ5+ and Vγ7+ T cells found in infected Vγ1−/− mice were distinct from Vγ5+ DETCs and Vγ7+ iIELs. Functional analyses of the novel γδ T-cell subsets identified for infected Vγ1−/− mice showed that whereas the Vγ5+ and Vγ7+ subsets may compensate for the absence of Vγ1+ T cells by producing similar cytokines, they do not possess cytocidal activity and they cannot replace the macrophage homeostasis function of Vγ1+ T cells. Collectively, these findings identify novel subsets of γδ T cells, the recruitment and activity of which is under the control of Vγ1+ T cells.
Related Links	http://dx.doi.org/10.1128/iai.74.2.1097-1105.2006
Ending Page	1105
Page Count	9
Starting Page	1097
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	2
Volume Number	74
Language	English
Publisher	American Society for Microbiology
Publisher Date	2006-02-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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