Seung Heon Shin
Catholic University of Daegu, South Korea
Title: Effect of microencapsulated essential oil from Chamaecyparis obtusa on monocyte-derived dendritic cell activation and CD4+ T cell polarization
Biography
Biography: Seung Heon Shin
Abstract
The essential oil of Chamaecyparis obtusa (C. obtusa) which is used in soap, toothpaste and aromatic agents has been known to have anti-inflammatory properties. In this study, we investigated the effects of microencapsulated C. obtusa essential oil on airborne fungus-induced Dendritic Cell (DC) activation and Th immune responses. We stimulated monocyte-derived DCs with Alternaria alternate and Lipopolysaccharide (LPS). To determine the anti-inflammatory effects, we pre-treated DCs with various concentrations of microencapsulated C. obtusa essential oil and collected the supernatants to measure Interleukin-6 (IL-6) and Tumor Necrosis Factor-alpha (TNF-α) and we determined the expression of cell surface molecules. The effects of the essential oil on CD4+ T cells polarization was determine by culturing stimulated DCs and autologous CD4+ T cells. Alternaria enhanced the production of IL-6 and TNF-α from DCs, and pretreating DCs with 0.001, 0.01, and 0.05% of the essential oil significantly inhibited their production. Increased CD80 and CD86 expression by Alternaria was significantly inhibited with 0.05% of the essential oil. Alternaria-induced IL-5, IL-10, and interferon-gamma from CD4+ T cells were significantly inhibited with C. obtusa essential oil in a dose dependent manner. C. obtusa influenced both Alternaria- and LPS-induced Th1 and Th2 polarization of CD4+ T cells. These results suggest a novel pharmacological use for C. obtusa essential oil to treat inflammatory airway diseases.