The proportion of intrahepatic CD4~+ CD25~+ Tr cells from three groups was determined by FCM. And their suppression on the proliferation of CD4~+ CD25~- T effector cells was an- alyzed by cell proliferation assay in vitro.

• 体外细胞增殖试验研究CD4~+CD25~+Tr细胞对CD4~+CD25~-T细胞的免疫抑制作用。