Changes in Th cell (Th1/Th2) subtypes during ECP treatment.

Dot plots of secreted IFN-γ (Th1); IL-4, IL -10 (Th2) captured by cytokine-catching molecule and detected by FACScan. (A) Th1/Th2 subpopulations of PBMC from patients with cGVHD at first cycle of ECP. (B) Th subpopulations after 6 months of ECP treatment. (C) Th subpopulations after last cycle of ECP treatment.