Browsing by Autor "Mirellle Hontebeyrle-Joskowicz"

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    Skewed V<sub>β</sub> TCR repertoire of CD8<sup>+</sup> T cells in murine <i>Trypanosoma cruzi</i> infection
    (Oxford University Press, 1994) Maria Leite‐de‐Moraes; António Coutinho; Mirellle Hontebeyrle-Joskowicz; Paola Minóprio; Harvey Eisen; António Bandeira
    We have followed CD4 and CD8 TCR V beta repertoires during the acute phase of Trypanosoma cruzi infection in a resistant mouse strain (C57BL/6). No major changes were found in the V beta TCR distributions analyzed (covering roughly 40% of the TCR repertoire) in peripheral CD4 T lymphocytes, confirming the polyclonal nature of CD4 T cell responses. In contrast, in most animals, an over-representation of V beta 5 and V beta 14 TCR families was disclosed in the CD8 T cell compartment, superimposed on a predominantly polyclonal response. The preferential expansion of V beta 5+CD8+ T cells was also observed after infection of sensitive (C3H/HeJ, BALB/c) mouse strains. These observations suggest the existence of CD8 T cell-directed superantigenic activities associated with parasites.