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- W2009161521 abstract "The combined treatment with interferon beta (IFNbeta) and glatiramer acetate (GA) is of current interest in multiple sclerosis (MS). The therapeutic effect of GA in MS is believed to be mediated by GA-specific Th2 cells. IFNbeta has a significant anti-proliferative effect on GA-induced lymphoproliferation in vitro. Therefore, we examined the possibility that IFNbeta may interfere with the generation and phenotype of GA T-cell responses in MS patients receiving combined therapy. Sixty-six GA-specific T-cell lines (TCL) were generated ex vivo from five MS patients enrolled in an open-label dinical trial of combined IFNbeta/GA treatment. Controls included 83 pretreatment and 131 on-treatment GA-TCL from 11 MS patients treated with GA only, and five GA-TCL generated from four patients receiving IFNbeta-1a monotherapy. IFNgamma and IL-5 (markers of Th1 and Th2 responses, respectively) were assayed by ELISA in GA-TCL supematants. Th1/Th2 bias was defined by the IFNgamma/IL-5 level ratio ( >2 = Th1 bias, <0.5 = Th2 bias, and 0.5-2 = Th0 bias). The frequency with which GA-reactive TCL were generated was 37.0% for the patients in the combination trial compared to 33.3% in the patients receiving GA alone. The mean stimulation index of the GA-TCL was 8.41 (range 2-42) for the combination compared to a mean of 6.29 (range 2-37) for the GA-treated group--a nonsignificant difference. Mean GA-TCL IFNgamma production was significantly lower in all treatment groups compared to pretreatment IL-5 levels were enhanced in all treatment groups compared to pretreatment levels, but the change was not statistically significant. The Th1/Th0/Th2 distribution of GA-TCL was 7%/30%/63% for the GA+IFNbeta group, 8%/9%/83% for the GA group, compared to 48%/21%/31% pre-GA treatment. All five GA-TCL from the IFNbeta-1a monotherapy patients were Th2-biased. We conclude that IFNbeta-1a does not affect the generation of GA-reactive T cells in vivo. Although more Th0 G4-TCL occurred with combination therapy than with G4 treatment alone, both groups shared an overall Th2 bias. Therefore, we speculate that combined therapy is unlikely to reduce the efficacy of GA treatment in MS." @default.
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- W2009161521 date "2002-12-01" @default.
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- W2009161521 title "Effect of combined IFNb-1a and glatiramer acetate therapy on GA-specific T-cell responses in multiple sclerosis" @default.
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- W2009161521 doi "https://doi.org/10.1191/1352458502ms862oa" @default.
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