Evaluation of T cell responses in healing and nonhealing leishmaniasis reveals differences in T helper cell polarization ex vivo and in vitro |
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Authors: | B.-S. CHOI,& P. KROPF |
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Affiliation: | Department of Immunology, Faculty of Medicine, Imperial College London, UK |
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Abstract: | Experimental leishmaniasis is widely used to study the effector functions of T helper cell subsets in vivo . Healing and nonhealing Leishmania major infections have been correlated with T helper 1 and T helper 2 responses, respectively. In the present study, we determined T cell effector functions ex vivo , without any further restimulation and compared them to those obtained following antigen-specific restimulation in vitro . Our results show that T helper cell responses are significantly less polarized when determined ex vivo as compared to those measured after restimulation in vitro . Moreover, the differences in CD4+ T cell proliferation observed between healer and nonhealer strains of mice differed ex vivo and in vitro . Our results suggest that determination of both ex vivo as well as in vitro T cell responses is crucial to characterize immune responses during experimental leishmaniasis. |
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Keywords: | cell proliferation T cells Th1/Th2 cells |
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