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- W4313333829 abstract "Abstract The differentiation of CD4+ T cells into a Th1 vs Th2 phenotype profoundly influences the outcome of autoimmune and infectious diseases. B7 costimulation has been shown to affect the production of both Th1 and Th2 cytokines, depending on the system studied. There is, consequently, great interest in manipulating the B7 costimulatory signal for therapeutic purposes. To optimally manipulate this key immunoregulatory pathway, the contribution of B7 costimulation to cytokine production requires further clarification. We have compared the B7 requirement for cytokine production by naive vs previously activated T cells using DO11.10 TCR transgenic CD4+ T cells and splenic APCs from mice lacking B7 expression. Our data indicate that induction of IL-4 production and Th2 differentiation by naive T cells is highly dependent on B7 molecules, whereas IL-4 production by previously activated T cells is B7 independent. The predominant contribution of B7-mediated signals to Th1 cytokine production by both naive and primed T cells is upon IL-2 production (and expansion) rather than IFN-γ (effector cytokine) production. Thus, our studies demonstrate that the antigenic experience of a T cell at the time of B7 blockade may determine whether blockade predominantly affects T cell expansion, differentiation, or effector cytokine production. These differential effects of B7 costimulation on IL-2 vs IFN-γ production and on IL-4 production by naive vs primed T cells have important implications for understanding how B7:CD28/CTLA4 blockade can be effectively used to manipulate cytokine production in vivo." @default.
- W4313333829 created "2023-01-06" @default.
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- W4313333829 creator A5044052948 @default.
- W4313333829 date "1998-09-15" @default.
- W4313333829 modified "2023-10-16" @default.
- W4313333829 title "Studies Using Antigen-Presenting Cells Lacking Expression of Both B7-1 (CD80) and B7-2 (CD86) Show Distinct Requirements for B7 Molecules During Priming Versus Restimulation of Th2 But Not Th1 Cytokine Production" @default.
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- W4313333829 doi "https://doi.org/10.4049/jimmunol.161.6.2762" @default.
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