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Objectives : Atopic dermatitis is a chronic inflammatory skin disease with frequent relapses. This study was to investigate the effects of Gammakdaejo-tang(GMD) in DNCB induced atopic dermatitis mice. Methods : The study was divided into five comparion groups. 2,4-dinitrochlorobenzene(DNCB) solution was applied to Nc/Nga mice to induce atopic dermatitis, followed by normal group, negative control group with distilled water, positive control group with Dexamethasione and GMD 200㎎/㎏ or 400㎎/㎏. The control group was orally administered 200㎕ once daily for 4 weeks. Visual skin condition, Immunoglobulin E, Histamine, Cytokine, Immune cells, Tissue biomarkers were observed. Results : As a result of the dermatitis score evaluation, it was confirmed that the GMD-administered group improved symptoms compared to the negative control group. As a result of measuring IgE, the GMD-administered group significantly decreased compared to the negative control group. As a result of measuring Histamine, GMD group except 200㎎/㎏ of GMD significantly decreased compared to negative control group. As a result of measuring cytokine, GMD 200㎎/㎏ significantly reduced IL-1β, IL-6 and TNF-α compared to the negative control. 400㎎/㎏ significantly reduced IL-1β, IL-4, IL-5, IL-6, IL-10, TNF-α and significantly increased IL-2, IFN-γ. As a result of confirming the immune cells, all experimental groups showed no difference in basophil, GMD group significantly reduced monocyte and eosinophil compared to negative control group, and GMD 400㎎/㎏ group significantly reduced white blood cell and neutrophil. And significantly increased lymphocytes. As a result of measuring the gene expression level, all GMD group significantly increased TGF-β1 compared with the negative control group, and filaggrin, VEGF and EGF were significantly increased in GMD 400㎎/㎏ group. Epidermis, dermis thickness, and eosinophil infiltration were found to be decreased in all GMD groups compared with the negative control group. Conclusions : GMD is effective in atopic dermatitis by reducing imbalance of immune response of T cells (Th1 / Th2) and reducing skin tissue damage and inflammatory response.

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