Figure 5.

Confocal microscopy reveals cytosolic forkhead box protein 3 (FOXP3) in eosinophils. Eosinophils and CD4⁺ T cells from healthy individuals, stained for FOXP3, and CCR3 (eosinophils) or T cell receptor (TCR)‐α/β (CD4⁺ T cells), were cytopsun onto glass slides and FOXP3 expression detected by laser scanning confocal microscopy. Shown are representative images of (a) FOXP3⁺ eosinophils and (b) FOXP3⁺CD4⁺ T cells. Isotype control‐stained eosinophils (c) and CD4⁺ T cells (d) are shown for comparative purposes.