The expression rate of HLA?DR antigen on CB cells was 28%,which was apparently lower than that of the control (45%) with an inhibition rate of 38.2%.

• 用流式细胞仪测定转染的脐血细胞HLA－DR抗原阳性细胞率为28%25（对照组为45%25），其抑制率为38.；2%25。