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이정호,박낭규,양은영,이현옥,한동민,백승화,Lee Jeong-Ho,Park Nang-Kyu,Yang Eun-Yeong,Lee Hyun-Ok,Han Dong-Min,Baek Seung-Hwa 대한예방한의학회 2000 대한예방한의학회지 Vol.4 No.1
This study was carried out to evaluate cytotoxic effects of Houttuynia cordata Thunberg extracts on murine leukemia tumor cell lines. Disruptions in cell organelles were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazol iumbromide (MMT) assay. The comparison of $IC_{50}$ values of Houttuynia cordata Thunberg extracts on $L1210,\;P388D_1$ and Vero cell lines showed that the methanol extract of Houttuynia cordata Thunberg indicated the most antitumor activity in the MTT assay. In order to develop a antimicrobial agent, dried Houttuynia cordata Thunberg was extracted with several solvents, and then antimicrobial activity was investigated. The minimal inhibitory concentration (MIC) of the extracted substance against microorganisms were also examined. Antimicrobial activity of amocla and ketoconazole as references was compared to those of other solvent extracts such as $H_2O$, n-hexane, chloroform, ethyl acetate ethanol and methanol. The antimicrobial activity of all extracts from the sample had growth inhibition activity against gram-negative bacteria, yam-positive bacteria and fungi $(MIC,\;>\;200\;{\mu} g/ml)$. These results suggest that the methanol soluble extract of Houttuynia cordata Thunberg may be a valuable choice for the studies on the treaeent of murine leukemia tumor cell lines and antimicrobial agents.
양현옥,오현주,박낭규,최은영,이현옥,양은영,천현자,정순량,이강민,백승화,Yang Hyun-Ok,Oh Hyun-Ju,Park Nang-Kyu,Choi Eun-Young,Lee Hyun-Ok,Yang Eun-Yeong,Chun Hyun-Ja,Chung Soon-Ryang,Lee Kang-Min,Baek Seung-Hwa 대한예방한의학회 2000 대한예방한의학회지 Vol.4 No.2
This study was carried out to evaluate cytotoxic effects of Poncirus trifoliata Raf. extract on lymphocytic leukemia tumor (L1210) cell lines. Disruptions in cell organelles were determined by 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide (MTT) assay The comparison of Ic50 Values of Poncirus trifoliata Raf. extract in L1210 cell lines showed that their susceptibility to these fractons decreased in the following order: adriamycin > Fr.4> Fr. 6> Fr. 5> Fr. 3> Fr. 1> Fr. 2 by the MTT assay. In order to develop an antumicrobial agent, Poncirus trifoliata Raf. was extracted wit ethanol, and then it was fractionated with several mobile phase. The antitumor activities of fractions of the ethanol soluble extract was investigated. The minimal inhibitory concentrations (MIC) of fractions of the ethanol soluble extract of Poncirus trifoliata Raf. against microorganisms were also examined. Antimicrobial activities of ampicillin and ketoconazole as references were compared to those of fractions of the ethanol soluble extract of Poncirus trifoliata Raf. The antimicrobial activities of all fractions from the extract had growth inhibition activities against gram-positive bacteria, gram-negative bacteria and fungi $(MIC\;>\;200{\mu}g/ml)$. These results suggest that fraction 4 of the ethanol soluble extract of Poncirus trifoliata Raf. possessed the most antitumorous agent.
이현옥(Hyun Ok Lee),박낭규(Nang Kyu Park),정승일(Seung Il Jeong),김윤철(Youn Chul Kim),백승화(Seung Hwa Baek) 대한약학회 2001 약학회지 Vol.45 No.6
Two flavanones, (2S)-2'-methoxykurarinones (1) and kurarinones (2), were isolated from the ethyl acetate extract of the roots Sophora flavescens of Ait. Their structrures were elucidated using NMR, UY and IR spectral analysis. These compounds exhibited a moderate antimicrobial activities against Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas putida and a weak anti-fungal activity against Candida albicans.
고삼의 Streptococcus mutans에 대한 항세균 효과
이현옥,이경희,박낭규,정승일,백승화,한동민 한국식품영양학회 2000 韓國食品營養學會誌 Vol.13 No.6
고삼에서 치아우식원인세균인 S. mutans에 대한 항세균효과와 GTase의 활성을 저해하는 물질을 탐색, 개발하여 식품 또는 치아우식예방제로 응용하기 위하여 연구를 수행하였다. 고삼 에틸 아세테이트추출물의 3차 분획의 소분획에서 S. mutans에 대한 최소억제농도가 3.13 ㎍/ml으로 나타나, 높은 항세균효과를 관찰할 수 있었다. GTase 활성은 고삼의 에틸 아세테이트 추출물에 의하여 glucan의 형성을 저해하였으며, 100 ㎍/ml의 농도에서 77%의 저해율이 나타났고, 통계학적으로 유의한 효과가 나타났다 (p<0.05). 이상의 결과로 고삼은 치아우식예방제로 개발 가능성이 있다고 기대된다. The purpose of this study is to investigate antibacterial activities of Sophora flavescens Ait. extracts for the prevention of dental caries caused by Streptococcus mutans. The fraction 5-4-3 of the ethyl acetate soluble extract of Sophora flavescens Ait. Showed strong growth inhibition activity against Streptococcus mutans (MIC, 3.13 ㎍/ml). The glucosyltransferase activity inhibited the formation of glucan by the fraction 5-4-3 and showed 77% of the antiproliferative effect at 100 ㎍/ml. This showed a significant activity (p<0.05). These results suggest that the fraction 5-4-3 of the ethyl acetate soluble extract of Sophora flavescens Ait. may be a valuable material as the prevention of dental caries.