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도라지 잎 에탄올 추출물의 주요 성분 분석 및 마우스 대식세포와 인체 폐암세포에서 항염효과
이정민,배병준,최지림,정영신,Jung Min Lee,Byeong Jun Bae,Jee-Lim Choi,Young-Shin Chung 한국식품영양학회 2024 韓國食品營養學會誌 Vol.37 No.2
This study investigated major constituents and anti-inflammatory effects of an ethanol extract of Platycodon grandiflorum leaves. Through HPLC analysis, chlorogenic acid and luteolin-7-O-glucoside were identified as predominant constituents in the ethanol extract. Their anti-inflammatory effects were evaluated using murine macrophage (RAW 264.7 cells) and human lung carcinoma cells (NCI-H292 & A549). The ethanol extract significantly (p<0.01) inhibited the production of nitrite, interleukin-6 (IL-6), and prostaglandin E2 (PGE2) induced by lipopolysaccharide (LPS) in RAW 264.7 cells. Furthermore, the ethanol extract suppressed the expression of cyclooxygenase-2 (COX-2) and inducible NO synthase (iNOS) proteins in RAW 264.7 cells stimulated with LPS. In NCI-H292 and A549 cells, treatment with the ethanol extract significantly (p<0.05) decreased levels of pro-inflammatory cytokines IL-6 and IL-8 induced by IL-1β. The phosphorylation of ERK rather than JNK in the mitogen-activated protein kinase signaling pathway was observed to be a more important mediator in the down-regulation of pro-inflammatory cytokines in NCI-H292 cells. These findings suggest that the ethanol extract of Platycodon grandiflorum leaves containing luteolin-7-O-glucoside exhibits promising anti-inflammatory properties.
노기덕(Ki-Deok Ro),김종현(Jeong-Hyun Kim),천중희(Jung-Hee Chun),배병준(Byeong-Jun Bae),구정호(Jeong-Ho Gu),김성재(Sung-Jae Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
The Flow fields of a ship's propulsion mechanism of Weis-Fogh type are studied in this paper using the advanced vortex method. The airfoil and the channel are approximated by a finite number of source and vortex panels, and the free vortices are introduced from the body surfaces. The viscous diffusion of fluid is represented using the core-spreading model to the discrete vortices. The velocity is calculated on the basis of the generalized Biot-Savart law and the pressure field is calculated from integrating the equation given by the instantaneous velocity and vorticity fields. Two-dimensional unsteady viscose flows of this propulsion mechanism are numerically clarified, and the calculated results agree well with the experimental ones.
노기덕(Ki-Deok Ro),김종현(Jeong-Hyun Kim),천중희(Jung-Hee Chun),배병준(Byeong-Jun Bae),구정호(Jeong-Ho Gu),김성재(Sung-Jae Kim) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
The Flow fields of a ship's propulsion mechanism of Weis-Fogh type are studied in this paper using the advanced vortex method. The airfoil and the channel are approximated by a finite number of source and vortex panels, and the free vortices are introduced from the body surfaces. The viscous diffusion of fluid is represented using the core-spreading model to the discrete vortices. The velocity is calculated on the basis of the generalized Biot-Savart law and the pressure field is calculated from integrating the equation given by the instantaneous velocity and vorticity fields. Two-dimensional unsteady viscose flows of this propulsion mechanism are numerically clarified, and the calculated results agree well with the experimental ones.