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© Institut Pasteur
Macrophages et lymphocytes de souris. Image colorisée.
Publication : European journal of immunology

Strain-specific TCR repertoire selection of IL-4-producing Thy-1 dull gamma delta thymocytes

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of immunology - 01 Jan 2001

Azuara V, Grigoriadou K, Lembezat MP, Nagler-Anderson C, Pereira P

Link to Pubmed [PMID] – 11265636

Eur. J. Immunol. 2001 Jan;31(1):205-14

Thy-1 dull gamma delta thymocytes constitute an unusual subset of mature TCR gamma delta cells which share with NK T cells the expression of cell surface markers usually associated with activated or memory cells and the simultaneous production of high levels of IL-4 and IFN-gamma upon activation. In DBA / 2 mice, Thy-1 dull gamma delta thymocytes express a restricted repertoire of TCR that are composed of the V1 gene product mainly associated with V6.4 chains exhibiting very limited junctional sequence diversity. In this study we have characterized this gamma delta T cell population in different strains of mice and show that Thy-1 dull gamma delta thymocytes are present in every strain tested, albeit at different frequencies. Moreover IL-4 production by gamma delta thymocytes is mainly confined to the Thy-1 dull population in every strain tested. Finally, the repertoire of TCR expressed by Thy-1 dull gamma delta thymocytes varies in different strain of mice, although a biased expression of Vgamma1 and Vdelta6 chains was observed in all strains studied. However, the extent of junctional diversity of the V1 and V6 chains expressed by Thy-1 dull gamma delta thymocytes varied from oligoclonal in DBA/2 mice to polyclonal in FVB/N mice. Thy-1 dull gamma delta thymocytes from mouse strains such as C3H/HeJ and BALB/c contain cells with diverse Vdelta6(D)Jdelta junctions together with cells with relatively homogeneous Vdelta6(D)Jdelta junctions, similar to those found in DBA/2. Thus, the Thy-1 dull gamma delta population appears to contain two subsets of cells which differ in the diversity of their TCR.

http://www.ncbi.nlm.nih.gov/pubmed/11265636