• Korean Journal of Medicinal Crop Science
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• v.7 no.1
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• pp.37-44
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• 1999

This study was conducted to screen antitumoral activity by in vitro bioassay method using 60 Korean medicinal and food plants extracted by 80% EtOH. Antitumor activity test was applied by the PKC(protein kinase C) and antibleb formation, PLC (Phospholipase C), and colorimetric tetrazolium assay (MTT assay) methods. Chenopodjum album and black Glycine max showed high antitumoral activity by 73.5% and 81.0%, respectively, against PKC by bleb-forming assay and PKC enzyme assay on human chronic leukemia K562 cell. Black Glycine max also showed 91.2% antitumoral activity in the PLC method and the lowest $IC_{50}$ $value(4.7{\mu}g/ml)$ by MTT method against P-338 cell line. In the effect of the concentration treatment on antitumoral test, the more concentration indicated the more activity value.

• Environmental Mutagens and Carcinogens
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• v.18 no.2
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• pp.104-108
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• 1998

In the present study, we have evaluated cytotoxic effects of Taraxaci Herba extract in human oral epitheloid carcinoma cells. An antitumor activity was measured by colorimetric assays using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) and sulforhodamine protein B (SRB). The light microscopic study showed morphological changes, Ag-NOR (argyrophylic nucleolar organizer region) number and PAS positive reaction or the treated cells. These results obtained are as follows : MTT and SRB quantities were significantly decreased in cultured KB cells treated with 10$^{-2}$ /mg/ml and 10$^{-3}$ /mg/ml concentrations. The number of Ag-NORs were significantly decreased in cultured KB cells treated with 10$^{-2}$ /mg/ml and 10$^{-3}$ /mg/ml concentrations and the rate of Ag-NORs was shifted to left side (one Ag-Nounucleus was increased and five Ag-NORs/nucleus were decreased) by the high concentration. PAS reaction of cultured KB cells treated with 10$^{-2}$ /mg/ml and 10$^{-3}$ /mg/ml concentrations was negative. These results suggest that Taraxaci Herba retains a potential antitumor activity.

• Korean Journal of Pharmacognosy
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• v.29 no.1
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• pp.22-27
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• 1998

This study was carried out to develop antitumor agents based on effects of the ethyl acetate soluble fraction of the methanolic extract of Lonicerae flos on human oral epitheloid carcinoma cells. Human oral epitheloid carcinoma cells were cultured in RPMI-1640 media containing 10% fetal bovine serum, antibiotic, and fungizone. After incubation for 24 hrs, the cells were treated with A, B, C, D, and E fractions for 48hrs under the same condition. MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide), NR (Neutral red) and SRB (Sulforhodamine B protein) assay were performed. The light microscopic findings were observed by inverted microscope. In MTT assay, fraction B was shown significant antitumor activity (P<0.001), fraction E was shown significant antitumor activities (P<0.05), but the other fractions were not shown. In NR assay, fraction B was shown significant antitumor activity (P<0.001). In SRB assay, fractions B was shown significant antitumor activities (P<0.01). fractions A and D were shown significant antitumor activities (P<0.05). but the other fractions were not shown. In light microscopy. the fraction B of the ethyl acetate soluble fraction of the methanolic extract of Lonicerae flos showed the highest antitumor activity. These finding suggested that fraction B possessed the most antitumorous agent.

• Korean Journal of Pharmacognosy
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• v.29 no.3
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• pp.198-203
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• 1998

In the present study, we have evaluated cytotoxic effects of Taraxaci herba extract on human skin melanoma cells. The light microscopic study showed morphological changes of the treated cells. Disruptions in cell organelles were determined by calorimetric methods: MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide), NR (Neutral red) and SRB (Sulforhodamine B protein) assay. These results suggest that Taraxaci herba retains a potential antitumor activity.

• Korean Journal of Pharmacognosy
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• v.28 no.4
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• pp.264-270
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• 1997

This Study was carried out develop antitumor effect of the n-butanol soluble of fraction of Perilla frutescens on human skin melanoma cells. The antitumor activity of various fractions obtained form n-butanol soluble fraction of Perilla frutescens was evaluated in human skin melanoma cells. The antitumor activity of the n-butanol soluble fraction in human skin melanoma cells was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay, neutral red (NR) assay and sulforhordamine B protein (SRB) assay of colorimetic assay methods. The light microscopic study was carried out to observe morphological changes of cultured human skin melanoma cells. These results were obtained follows; The fractions 5 and 6 of the n-butanol soluble fraction of P frutescens were shown significant antitumor activities. The number of human skin melanoma cells were decreased and tend to form cell cluster by treatment with actions 5 and 7 of the n-butanol soluble fraction of P. frutescens. The fraction 6 of the the n-butanol soluble fraction showed the highest antitumor activity on P. frutescens. These results suggest that the fraction 6 of the n-butanol soluble fraction of P. frutescens may be a valuable choice for the studies on the treatment of human skin tumors.

• Environmental Mutagens and Carcinogens
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• v.18 no.1
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• pp.37-42
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• 1998

In the present study, we have evaluated cytotoxic effects of the chloroform soluble fraction of the methanolic extract of Perilla frutescens in human oral epitheloid carcinoma cells. The light microscopic study showed morphological changes of the treated cells. Cell membrane damaging activity was measured by the lactate dehydrogenase (LDH) assay and disruptions in cell organelles were determined by 3-(4,5-dime-thylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT), neutral red (NR) and sulforhodamine protein B (SRB) of colorimetric assay. These results suggest that Perilla frutescens retains a potential antitumor activity.

• Korean Journal of Pharmacognosy
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• v.28 no.4
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• pp.192-197
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• 1997

As a part of searching for new antitumor agents from natural products, 94 kinds of Chinese plants were extracted with petroleum ether/ether (1:1), ethyl acetate and methanol, successively and their cytotoxicities were evaluated against A549 (human lung carcinoma) cell line. Among them, six kinds of ether extracts, seven kinds of ethyl acetate extracts and one kind of methanol extracts showed significant cytotoxic activities (above 70% inhibition) at a concentration of $50\;{\mu}g/ml$. These results surest that they may be involved in natural sources with possible anticancer activities.

• Korean Journal of Pharmacognosy
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• v.30 no.2
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• pp.130-136
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• 1999

The cytotoxic and antitumor activity of Herba cratalariae sessiliflorae on cultured NIH 3T3 fibroblast and human oral epitheloid carcinoma cells were evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide (MTT) colorimetric method. The light microscopic study was carried out to observe morphological changes of cultured mouse fibroblast and human oral epitheloid carcinoma cells (KB). These results were obtained as follows; Ethyl acetate, chloroform and hexane extracts showed a significant cytotoxicity in NIH 3T3 fibroblast, but the other extracts did not show. All extracts exhibited a significant antitumor activity in human oral epitheloid carcinoma cells, but ethanol extract did not show a antitumor activity. Hexane extract showed low cytotoxic effect, but exhibited the most antitumor activity. The MTT absorbance in NIH 3T3 fibroblast was significantly decreased by treatment with chloroform, ethyl acetate and hexane extracts respectively. Human oral epitheloid carcinoma cells was significantly decreasd by treatment with all extracts with the exception of ethanol extract. The difference in MTT absorbance in two cell Types was most remarkable when treated with water and hexane extracts. Cholroform and hexane extracts showed the strongest effect in growth inhibition of human oral epitheloid carcinoma cells. These results indicated that water extract possessed no cytotoxicity and a strong antitumor activity.

• Journal of Food Hygiene and Safety
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• v.10 no.4
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• pp.219-224
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• 1995

The antimutagenic effects of 46 kinds of medicinal plants that have been used as traditional folk antitumor agents in Korea were studied by using Ames mutagenicity test. Most of the methanolic extracts from the plants which were used in this experiment showed strong antimutagenic activity toward aflatoxin B1(AFB1) in Salmonella typhimrium TA100 and TA98. However, N-methyl-N'-nitro-N-nitrosoguanidine(MNNG) induced mutagenicity was not blocked by adding the methanolic extracts of the plants except persimmon leaves (Diospyros kaki Thunberg)and Elaeagnus umbellata.

• Korean Journal of Plant Resources
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• v.5 no.2
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• pp.85-93
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• 1992

This experiment was Conducted ta screening for the anti-cancer efficacy from the wild plants which are naturally growing in the Korea. The results are as follows. The results were shown thatZea may L. nad significantly effects on mediculal efficacy anganist anti-tumor by usulg the totalpacked cell volume methods and also, severals plants, such as Sofonum nigrum, Patrinia hispidoBunge, Eragrostis, ferrugenia Beauv, Salaginela pouzolgiana Spring, Platrycarya strobilacea Bunge,Codonopsis lanceolata Benth. et Hook fil. which are collected from Giri and Mooju mountain in Koreaand Nagano in Japan were showed effects on auti-tumor. But the pharmaceologial activities ofPharbitis nil Choisy was believed to strong effec on anti - cancer tumors, while toxicity of its wasshown high that induced te kill all used mice. Extraction of Patrinia hispida Bunge, Pharbitis nilChoisy, Toilis japonica DC, Eragrostis erruginea Beauv. and Forsythia koreana Nakai showed effec-tively supressed on growth rate of cancer tumor by the below 50 percent of T/C ratio at 30mg /mlof extraction from plant. That Is strong activity while Reynouxria japonica Houtt. was observed onlymild activities. The above results many possibly suggest that Patrinia hispido Bunge and Eragrostisferrugina Beauv. inhibited the growth of cancer tumor by the both total packed cell volume methodand cytotoxicity method. Although basic research is still going on, we will find out an accurate moth-od for developing useful medicinal plant to improve pharmacological activites against anti-cancertumor, especialy, in Eragrostis ferruginea Beauv.