• Journal of Microbiology and Biotechnology
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• 제10권1호
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• pp.27-34
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• 2000

The chloroform and methanol (2;1, v/v) extract from an edible plant, Actinidia arguta Planchon, appeared to possess antitumor activity against human leukemias Jurkat T and U937 cells through inducing apoptosis. The substance in the solvent extract was purified by silica gel column chromatography, preparative TLC, and Sephadex LH-20 column chromatography. Characteristics of the substance analyzed by UV scanning analysis, $^1H$ and $^{13}C$ NMR spectra suggested that the substance belongs to the chlorophyll derivatives-like group. The $IC_{50}$ value of the chlorophyll derivative (Cp-D) determined by MTT assay was $15\mu\textrm{g}/ml$ for Jurkat, $10\mu\textrm{g}/ml$ for U937, and $11.4\mu\textrm{g}/ml$ for HL-60m and was more toxic to these leukemias than to solid tumors or normal fibroblast. In order to elucidate cellular mechanisms underlying the cytotoxicity, the effect of the Cp-D on Jurkat T cells was investigated. When cells were treated with the Cp-D at a concentration of $15\mu\textrm{g}/ml$, [3H]thymidine incorporation declined rapidly and wa undetectable in 1h. However, no significant changes were made in the cell cycle distribution of the cells by 24h. The sub-Gl peak representing apoptotic cells began to be detectable in 36h, at which time apoptotic DNA fragmentation was also detected on agarose gel electrophoresis, demonstrating that the cytotoxic effect of the Cp-D is attributable to the induced apoptosis. Under the same conditions, although the protein level of cyclin-dependent kinases such as cdc4, csk6, cdk2, and cdc2 was not significantly changed until 24h, the kinase activity of all c안 rapidly declined and reached a minimum level within 1-6h and then recovered to the initial level by 12h and sustained until 24h. These results suggest that inactivation of cdks at an inappropriate time during the cell cycle progression in jurkat T cells following a treatment with the Cp-D leads to induction of apoptotic cell death.

• 생약학회지
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• 제36권3호통권142호
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• pp.245-251
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• 2005

Phytochemical examination of the barks of Actinidia arguta led to the isolation of five flavonoids. Structures of compounds were elucidated as catechin (1), (-)-epicatechin (2), quercetin (3), $quercetin-3-O-{\beta}-D-glucopyranoside$ (4), $quercetin-3-O-{\beta}-D-galactopyranoside$ (5) by comparison with previously reported spectral evidences. To investigate the anti-oxidative effect and nitric oxide (NO) production inhibitory activity of these compounds, DPPH radical scavenging activity and nitric oxide production inhibitory activity in $IFN-{\gamma}$, LPS stimulated RAW 264.7 cell were examined. The $IC_{50}s$ were determinied as follows : $1\;$IC_{50}=26.61\;{\mu}g/ml$, $2\;IC_{50}=25.30\;{\mu}g/ml$, $3\;IC_{50}=20.41\;{\mu}g/ml$, $4\;IC_{50}=18.23\;{\mu}g/ml$ , $5\;IC_{50}=30.46\;{\mu}g/ml$, $6\;IC_{50}=28.0;{\mu}g/ml$, $7\;IC_{50}=27.24\;{\mu}/ml$. These NO production inhibitory effects were significantly different compared with the positive control, L-NMMA $(IC_{50}=20.77\;{\mu}g/ml)$, respectively. Compound $1\;(IC_{50}=6.19\;{\mu}g/ml)$, $2\;(IC_{50}=8.98\;{\mu}g/ml)$, $3\;(IC_{50}=7.30\;{\mu}g/ml)$ and $4\;(IC_{50}=7.64\;{\mu}g/ml)$ also showed potent antioxidative activities similar level to ascorbic acid $(IC_{50}=9.22\;{\mu}g/ml)$. These results suggest that barks of A. arguta have a potent anti-oxidative and anti-inflammatory activity.

• 한국식품과학회지
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• 제47권2호
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• pp.164-169
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• 2015

묵나물 형태의 삼나물, 미역취, 다래순, 방풍나물, 생채인 참나물의 75% 에탄올 추출물의 산화 방지 활성, ${\alpha}$-glucosidase와 pancreatic lipase 저해 활성을 평가하고 폴리페놀 화합물, 플라보노이드, 토코페롤 함량을 구하여 이들 활성과의 상관관계를 분석하였다. DPPH 라디칼 소거활성은 삼나물과 다래순에서, ${\alpha}$-glucosidase 저해활성은 삼나물, 다래순, 방풍나물에서, pancreatic lipase 저해 활성은 미역취와 다래순에서 높았다. 삼나물 추출물은 폴리페놀 화합물과 플라보노이드 함량이 매우 높았으며, 다래순 추출물은 다른 산채에 비해 토코페롤 함량이 높았다. 산채 추출물의 산화 방지 성분 함량과 in vitro 활성 사이의 상관관계는 플라보노이드와 DPPH 라디칼 소거 활성 사이의 상관관계($r^2=0.8895$)를 제외하고는 높지 않았으나, ${\alpha}$-glucosidase와 pancreatic lipase 저해활성이 높았던 삼나물과 다래순은 항당뇨, 항비만 활성을 가진 잠재적인 식품 자원으로 기대되었다.