Objective: To observe the effects of Xiezhuojiedu Decoction on expression of T cell subsets and IL-10 in ulcerative colitis rats,and explore its mechanism.Methods: 2,4,6 trinitrobenzene sulfonic acid(TNBS)/ethanol solution was administrated by enema to make ulcerative colitis rats models.Five groups were set up in the experiments: normal control group,modeling control group,salazosulfamide group,Xiezhuojiedu Decoction low-dose group and Xiezhuojiedu Decoction high-dose group;Determined cytokines T cell subs...