Abstract
Epigallocatechin-3-O-gallate (EGCG) is the major component of green tea extract, commonly found in dietary supplements, and has been associated with immune-mediated liver injury. The purpose of this study was to investigate the immunogenicity of EGCG in healthy donors expressing HLA-B*35:01, and characterize EGCG responsive T-cell clones. We have shown that EGCG can prime peripheral blood mononuclear cells and T-cells from donors with and without the HLA-B*35:01 allele. T-cell clones were CD4+ve and capable of secreting Th1, Th2, and cytolytic molecules. These data demonstrate that EGCG can activate T-cells in vitro, suggesting a significant role in the pathogenesis of green tea extract induced liver injury.
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