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© Institut Pasteur
Macrophages et lymphocytes de souris. Image colorisée.
Publication : Journal of immunology (Baltimore, Md. : 1950)

Rates of recombination and chain pair biases greatly influence the primary gammadelta TCR repertoire in the thymus of adult mice

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of immunology (Baltimore, Md. : 1950) - 01 Sep 2004

Pereira P, Boucontet L

Link to Pubmed [PMID] – 15322188

J. Immunol. 2004 Sep;173(5):3261-70

Analyses of the rearrangement status of the TCRgamma and TCRdelta chain loci in progenies of individual gammadelta thymocytes showed a hierarchy of the different Vgamma and Vdelta gene segments to participate in a recombination reaction. Moreover, individual TCRgamma chains only pair efficiently with a variable number of TCRdelta chains. Interestingly, these two parameters are inversely correlated such that the TCRgamma and TCRdelta chains that rearrange more often show a higher level of restriction in their pairing capabilities. Our data suggest that these mechanisms, together with a natural variation affecting the expected frequencies at which rearrangement of different Vgamma gene segments give raise to functional TCRgamma chains, have coevolved to maximize the diversity of the gammadelta TCR repertoire minimizing the risk that a gammadelta T cell will express more than one TCR specificity at the cell surface, despite the fact that multiple TCRgamma rearrangements take place in the same progenitor cell.

http://www.ncbi.nlm.nih.gov/pubmed/15322188