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Th1 cells are more susceptible to AICD than Th17 cells. Activated and polarized cells of the two lines were re-exposed to HEL at the indicated concentrations, in the presence of DC, and the % specific cell death was determined by the annexin/propidium iodide staining, as detailed in Ref. 8. The apoptotic levels in control cultures, of DC alone, are also recorded in the Figure.
