Fig. 3. Suppressive activity of LDS Tregs.
(A and B) The three subsets of Tregs (rTregs, CD45RA−Foxp3inter Tregs, and aTregs) were purified and cocultured at various ratios (1:1, 2:1, and 5:1) with CD4+ effector T cells that had been labeled with CellTrace Violet. Cultures were stimulated with anti-CD3 and irradiated antigen-presenting cells, and dilution of the dye, a marker of proliferation, was assessed 4 days later. (A) Results from a representative experiment (n = 3). (B) Percent suppression of effector T cell proliferation at the different ratios (median and range are indicated). LDS (n = 3) and nonallergic (NA) control (n = 3) Tregs effectively suppress effector T cell proliferation.