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Anticomplementary Activity of Stilbenes from Medicinal Plants
Oh, Sei-Ryang,Ryu, Shi-Yong,Park, Si-Hyung,Jung, Keun-Young,Lee, Im-Seon,An, Kyung-Seop,Lee, Jung-Joon,Lee, Hyeong-Kyu The Pharmaceutical Society of Korea 1998 Archives of Pharmacal Research Vol.21 No.6
The anticomplementary activity of stilbenes from medicinal plants in Korea was investigated in vitro. 3,5-Dihydroxy-4'-methoxystilbene (3) was most potent with $IC_{50}$ value of $1.5{\times}10^{-4}M$ followed by rhapontigenin (4), oxyresverastrol (2), 2,3,4',5-tetrahydroxystilbene-2-O-beta-glucoside (9), rhaponticin (8), resverastrol (1), and piceid (7). The activity was found to be increased by a methylation on a hydroxy group of C-4' of 1, but decreased by further methylation on hydroxy groups of C-3 and C-5 and glucosylation on any hydroxy group of 1. Addition of hydroxy group on C-2' of 1 or C-3' of 3 was little affected on the anticomplementary activity but the activity was increased by O-glucosylation on C-2 of 1.
In Vitro Anticomplementary Activity of Hederagenin Saponins Isolated from Roots of Dipsacus asper
Oh, Sei-Ryang,Jung, Keun-Young,Son, Kun-Ho,Park, Si-Hyung,Lee, Im-Seon,Ahn, Yung-Seop,Lee, Hyeong-Kyu The Pharmaceutical Society of Korea 1999 Archives of Pharmacal Research Vol.22 No.3
Anticomplementary activity of hederagenin and related saponins isolated from Dipsacus asper was investigated in vitro. HN saponin F (3) was most potent with $IC_{50}$ value of$ 3.7{\times}10^{-5} M$ followed by 3-O-${\beta}-D-glucopyranosyl-(1{\rightarrow} 3)-{\alpha}-L-rhamnopyranosyl-(1{\rightarrow}2)-{\beta}-L-arabinopyranosyl$ hederagenin $28-O-{\beta}-D-glucopyranosyl-(1{\rightarrow}6)-beta$-D-glucopyrano side (8), $3-O-{\beta}-L-arabinopyranosyl$ hederagenin $28-O-{\beta}-D-glucopyranosyl-(1{\rightarrow}6)-{\beta}-D-glucopyranoside$ (5), dipsacus saponin A (4), and hederagenin (1) on the classical pathway (CP) of complement system, while the saponins 3-5 did not show the inhibition of hemolysis and rather increase the hemolysis on the alternative pathway (AP). However, all of C-3 monodesmosides [prosapogenin CP (2), dipsacus saponin B (6), and dipsacus saponin C (7)] evoked hemolysis directly on the erythrocytes.
In Vitro Anticomplementary Activity of Phenylpropanoids from Agastache rugosa
Oh, Sei-Ryang,Jung, Keun Young,Lee, Hyeong-Kyu The Korean Society of Pharmacognosy 1996 생약학회지 Vol.27 No.1
In searching for anticomplementary compounds, three phenylpropanoids were isolated from the roots of Agastache rugosa and identified as rosmarinic acid (RA), rosmarinic acid methyl ester (RAM) and caffeic acid methyl ester (CAM) by NMR analyses. RA and RAM exhibited strong inhibitory activity on both the classical pathway (CP) and the alternative pathway (AP) of the complement system, in vitro, but CAM did far less than RA and RAM. $RAM-M1{\sim}-M5$, the methylated derivatives from the RAM, showed that the inhibitory activity was decreased in inverse proportion to the number of methylated groups and $RAM-M 2{\sim}-M4$, the isomers of two methylated hydroxyl groups, exhibited different inhibition activity.
Oh, Sehyun,Oh, Hyun Woo,Lee, Ha‐,Reum,Yoon, Sun Young,Oh, Sei‐,Ryang,Ko, Young‐,Eun,Yoo, Nina,Jeong, Jinseon,Kim, Jae Wha John Wiley Sons, Ltd 2016 Journal of the science of food and agriculture Vol.96 No.8
<P>BACKGROUND: Euphorbia kansui, a traditional medical herb, has been shown to have anti-tumour and anti-viral activities. Previously, we have reported that E. kansui increases interferon-gamma (IFN-gamma) production in natural killer (NK) cells. However, it is not clear how E. kansui regulates IFN-gamma secretion by NK cells. RESULTS: In this study, E. kansui was separated into six individual compounds from the same chloroform fraction so that the activity of each compound could be compared. E. kansui compounds induced IFN-gamma secretion through the phosphorylation of protein kinase D and I kappa B kinase pathways. Furthermore, E. kansui compounds activated the translocation of p65, a sub-unit of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kappa B), to the nucleus and induced NF-kappa B at the transcriptional level. CONCLUSION: These findings suggest that E. kansui enhances IFN-gamma secretion through the NF-kappa B pathway in NK cells. (c) 2015 Society of Chemical Industry</P>
Streptomyces sp . no . 46 이 생산하는 살충성 물질의 구조 동정
오세량(Sei Ryang Oh),이형규(Hyeong Kyu Lee),구본탁(Bon Tak Koo),최수근(Soo Keun Choi),박상구(Sang Gu Park),신병식(Byung Sik Shin),박승환(Seung Hwan Park),김정일(Jeong Il Kim) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.2
In searching for new insecticidal compounds from soil microorganisms, strains of streptomyces species showed insecticidal activities on Musca domestica and Bombyx mori were selected. Compounds Ⅰ-Ⅳ, which were isolated from the metabolites of no. 46 strain, were identified as piericidin C₁, C₂, C₃ and D₁, respectively by UV and NMR data analyses.
방선균 분리주 No . 2077 이 생산하는 살충성 물질 SR 2077 의 구조 동정
오세량(Sei Ryang Oh),이형규(Hyeong Kyu Lee),최수근(Soo Keun Choi),김정일(Jeong Il Kim) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.4
During the screening of insecticidal compounds from soil microorganisms, SR 2077 was isolated from the metabolites of Actinomycetes isolate No. 2077 and identified as albocyctine by UV and NMR data analyses.
오세량(Sei Ryang Oh),정근영(Keun Young Jung),이형규(Hyeong Kyu Lee) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.2
To screen inhibitors on complement system from natural resources, micro-screening method was established by using hemolytic complement assay. Complement fixation reaction was carried out in the microplate system. For standard hemolysis (50% hemolysis) of the classical pathway (CP), hemolysin and complement serum were diluted to 1/75∼1/100 and 1/80∼1/120, respectively, when sheep erythrocytes were 5.0×10^8 cells/㎖. In case of the alternative pathway (AP), complement serum was diluted to 1/5 and EGTA and Mg^(2+) were added 4 mM, 4∼8 mM, respectively, when rabbit erythrocytes were 4.0×10^8 cells/㎖. Dimethyl sulfoxide was used for the assay of non-aquous soluble compounds or extracts and its final concentration was not more than 1%. Three phenylpropanoids showed anticomplementary activities in proportion to the concentration for both pathways and rosmarinic acid exihibited the highest inhibitory activities: 5.4±3.6%(0.063 mM)∼95.8±0.2%(0.5 mM) and 35.1±0.9%(0.063 mM)∼95.6±1.1%(1 mM) on the CP and the AP, respectively.