This article starts with a thought that the ideas of ‘Eol’(soul) and ‘Gugeo’(national language) presuppose each other. Given that ancient history was the place of struggle in which the desires of a modern nation-state were projected, national language was an important tool of the struggle for nationalist historians such as Shin Chaeho and Jeong Inbo, who attempted to reveal the reality of ancient history. At the same time, the history of national language could only be established based on national history. In order to take a critical look at this entangling of ‘national history’ and ‘national language’, this article analyzed Jeong Inbo's “Joseon's Eol of 5,000 Years”. Chapter 2 examines the specific aspects of the linguistic methodology Jeong Inbo used in “Joseon's Eol of 5,000 Years” and its status in his research on Korean history. Chapter 3 reviews Jeong Inbo's approach to describing ancient history, which introduced a linguistic methodology, in the academic context of the time and show that it was an important tendency of ‘Joseonhak’(Korean Studies) that sought to eventually find "Something true to Korea." Chapter 4 examines the correlation between the ideas of ‘Eol’ and ‘Gugeo’, which originated from ‘Guksu’ and ‘Gukon’.

A recent study reported that Pleurotus ostreatus has the potential to be used as a β-glucan-based cream for supportive complementary therapy of atopic dermatitis. KH054 is a new herbal prescription consisting of P. ostreatus and Panax ginseng. The effects of atopic dermatitis-induced materials on the expression of cytokine genes in human monocytes (THP-1, EoL- 1) have been examined. Some reports demonstrated that P. ginseng augments the activity of natural killer cells, which plays an important role in innate immunity against infection and tumor development. Monocyte chemotactic protein 1 (MCP-1), interleukin (IL)-6, and IL-8 have important roles in mediating the infiltration of various cells into the skin of atopic dermatitis and psoriasis. The present study investigated whether KH054 on induced IL-6, IL-8, and MCP-1 secretion by house dust mite (Dermatophagoides pteronissinus) in THP-1 (human acute monocytic leukemia) and EoL-1(Human eosinophilic leukemia) cell. D. pteronissinus functions in the pathogenesis of allergic diseases, including atopic dermatitis and asthma. The inhibitory effect of KH054 on the induction of IL-6, IL-8, and MCP-1 secretion by D. pteronissinus extract in THP-1 and EoL-1 cells was examined. KH054 potently suppressed the elevated production of IL-6 and IL-8 induced by D. pteronissinus treatment in THP-1 and EoL-1 cells. Based on the present results, KH054 may be useful for developing functional foods to treat atopic dermatitis.

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