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Polyozellus multiplex가 생산하는 지질괴산화 저해물질
황지숙,송경식,김양섭,석순자,이태호,유익동,Hwang, Ji-Sook,Song, Kyung-Sik,Kim, Yang-Sup,Seok, Soon-Ja,Lee, Tae-Ho,Yoo, Ick-Dong 한국미생물 · 생명공학회 1996 한국미생물·생명공학회지 Vol.24 No.5
In the course of screening lipid peroxidation inhibitor from basidiomycetes, a mushroom, which was collected at O-Dae mountain in Kangweon- Do, was found to have active compound. The mushroom was identified as Polyzellus multiplex, which belongs to Aphylloporalles Thelephoraceae, on the basis of macroscopic and microscopic characteristics of the fruiting body. The methanol extract of fruiting body was extracted with benzene and ethylacetate, sequentially. By using various kinds of chromatographies, PM1, and PM2 and PM3, were purified from the ethylacetate extract and the benzene extract, respectively. Color reaction and analyses of IR, UV, and NMR spectra indicated that PM1 was a derivative of thelephoric acid, and PM2 and PM3 were linoleic acid and oleic acid, respectively. IC$_{50}$ of PM1 for inhibition of lipid peroxidation was 1.96 ppm and LD$_{50}$ was 500 mg/kg.
이경희(Kyung Hee Lee),이현진(Hyun Jin Lee),박훈일(Hun Il Park),홍은옥(Eun Ok Hong),송경식(Kyung Sik Song) 대한약학회 1997 약학회지 Vol.41 No.2
One hundred and seventy crude drugs were screened for prolyl endopeptidase (PEP) inhibitors. Among them, 80% methanolic extract of 18 medicinal plants such as Polygonum cuspidata, Sanguisorba officinalis, Eugenia caryophyllata, Rubus coreanus, Cinnamomum cassia (Cassiae Cortex and Cinammomi Ramulus), Rheum palmatum, Ulmus pumila, Sorbus commixta, Areca catechu, Uncaria sinensis, Terminalia chebula, Caesalpinia sappan, Nelumbo nucifera, Machilus thunbergii, Paeonia moutan, Elscholtzia patrini and Cynomorium coccineum inhibited more than 70% of PEP activity at a concentration of 40 ppm. The active principles of P. moutan, M. thunbergii, T chebula, A. catechu, S. commixta, R. palmatum, R. coreanus, E. caryophyllata and P. cuspidata were transferred into organic solvents, which showed more than 75% inhibition at 5 ppm.
김경아 ( Kyung A Kim ),이경렬 ( Kyung Yeol Lee ),송경식 ( Kyung Sik Song ),노시갑 ( Si Kab Nho ) 한국잠사학회 2006 한국잠사곤충학회지 Vol.48 No.2
본 연구는 식물병원성곰팡이에 대한 곤충 혈액 및 유충 체의 항곰팡이 활성을 조사하였다. 집누에, 장수풍뎅이, 흰점박이 꽃무지 모두 곰팡이 저해활성을 나타냈으며, 집 누에의 계통간 비교에서는 1087계통의 활성이 가장 높았다. 또한, 혈액 보다는 유충체를 이용한 경우가 더 강한 항곰팡이 활성을 나타냈다. 곤충의 항곰팡이 활성은 곰팡이균주에 따라 다르며, 본 연구에 사용된 3종은 A pannax, C. gloeosporioides 및 P. oryzae 균에 항곰팡이 활성을 가진다. The hemolmyph and whole body of insect, Bombyx mori, Allomyrina dichotoma and Neotocia brevitarsi, conspicuously inhibited the mycelial growth of several plant pathogenic fungi. The hemolymph of 1087 strain among the 16 strains of B. mori has inhibition activities against the 3 species of fungi, Alternaria panax, Collctotrichum gloeosporioides, and Pyricularia oryzae. The whole body of B. mori was more effective than the hemolymph as a inhibitor on fungi growth. The antifungal activity of B. mori was variable to the fungi species. In addition, A. dichotoma and N. brevitarsi showed antifungal activities against the same fungi as did B. mori. These data showed that the insect has potent antifungal activity. Whereas, the level of activities were differ according to the fungal species. This finding underlines that the possibility of the insect can be use of the agent as a inhibitor against the plant pathogenic fungi.
유승조(Seung Jo Yoo),송경식(Kyung Sik Song) 한국생약학회 1991 생약학회지 Vol.22 No.1
Heavy metals may cause trouble(s) in human body. For consideration of the safety of crude drugs cultivated in Korea, we selected some medicinal plants and soils from cultivated site and estimated their heavy metal contents by inductively coupled argon plasma spectrometry (ICAP). Among heavy metals tested, the highest level of Cu and Zn were shown in plants cultivated in Kyung Ki; the highest level of Fe in those in Youngnam and the highest level of Mg and Mn in those in Youngdong. The heavy metal contents were as low as to be permeasible at least for the medicinal plants we selected. There were no significant correlations between heavy metal contents of soils and cultivated medicinal plants.
꾸지 뽕나무로부터 분리한 flavonoid 계 화합물의 암세포성장 저해 및 항산화 활성
이인경(In Kyoung Lee),송경식(Kyung Sik Song),김창진(Chang Jin Kim),김환묵(Hwan Muk Kim),오구택(Goo Taeg Oh),유익동(Ick Dong Yoo) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.2
Five cytotoxic and antioxidative flavonoids were isolated from the stem bark of Cudrania tricuspidata by consecutive purification using HP-20, silicagel and prep-HPLC. They were identified as taxifolin, orobol, eriodictyol, dihydrokaempferol and steppogenin by means of spectral studies. The antioxidative activities (IC_(50)) assayed by TBA method of these compound 1∼5 to were 6, 3, 3, $gt;50, and 10 ㎍/㎖, respectively. The effect on the growth inhibition (IC_(50)) of these compounds against P388 cell line were found to be 0.18, 3.3, 15 and 6.2 ㎍/㎖, respectively in the order of compound 2 to 5.
김주연,주현수,반주연,송경식,성연희,Kim, Joo-Youn,Ju, Hyun-Soo,Ban, Ju-Yeon,Song, Kyung-Sik,Seong, Yeon-Hee The Korean Society of Medicinal Crop Science 2008 한국약용작물학회지 Vol.16 No.6
Moutan cortex, the root bark of Paeonia suffruticosa Andrews (Paeoniaceae), has pharmacological effects such as anti-inflammatory, antiallergic, analgesic and antioxidant activities. We investigated a methanol extract of Moutan cortex for neuroprotective effects on neurotoxicity induced by amyloid ${\beta}$ protein ($A{\beta}$) (25-35) in cultured rat cortical neurons. Exposure of cultured cortical neurons to $10\;{\mu}M\;A{\beta}$ (25-35) for 24 h induced neuronal apoptotic death. Moutan cortex inhibited $10\;{\mu}M\;A{\beta}$ (25-35)-induced neuronal cell death at 30 and $50\;{\mu}g/m{\ell}$, which was measured by a 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide (MTT) assay and Hoechst 33342 staining. Moutan cortex inhibited $10\;{\mu}M\;A{\beta}$ (25-35)-induced elevation of intracellular calcium concentration ($[Ca^{2+}]_i$), and generation of reactive oxygen species (ROS) which were measured by fluorescent dyes. Moutan cortex also inhibited glutamate release into medium induced by $10\;{\mu}M\;A{\beta}$ (25-35), which was measured by HPLC. These results suggest that Moutan cortex prevents $A{\beta}$ (25-35)-induced neuronal cell damage by interfering with the increase of $[Ca^{2+}]_i$, and then inhibiting glutamate release and ROS generation. Moutan cortex may have a therapeutic role in preventing the progression of Alzheimer's disease.