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Effects of Dangkwiyughwangtang and Okbyoungpoongsangamibang on the immune response induced by Methotrexate in mice Kim Gyoung Sun, Kim Deog Gon Department of Pediatrics, college of Oriental Medicine, Kyunghee University Objectives : In order to study the effect of Dangkwiyughwangtang and Okbyoungpoongsangamibang on the immune response induced by methotrexate in mice. Method : Delayed type of hypersensitivity, hemagglutinin titer, hemolysin titer, rosette forming cells, phagocytic activity for immune response, lymphocyte transformation, and productivity of Interleukin-2 were measured. Results : Body weight decreasing was significantly inhibited as compared with control group in both the Dangkwiyughwangtang and Okbyoungpoongsangamibang groups. Delayed type of hypersensitivity was significantly increased as compared with control group in both groups. Hemagglutinin titer was significantly increased as compared with control group in both groups. Hemolysin titer was significantly increased as compared with control group in the Okbyoungpoongsangamibang group. Rosette forming cells were significantly increased as compared with control group in both groups. Phagocytic activity for immune response was slightly decreased in the Dangkwiyughwangtang group and slightly increased in the Okbyoungpoongsangamibang group insignificantly as compared with the control group. Lymphocyte transformation was significantly increased as compared with the control group in both the Dangkwiyughwangtang and Okbyoungpoongsangamibang groups. Productivity of Interleukin-2 was significantly increased as compared with the control group in both the Dangkwiyughwangtang and Okbyoungpoongsangamibang groups. Conclusion : Both the Dangkwiyughwangtang and Okbyoungpoongsangamibang groups enhance immunity in mice.