• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.178.1-178.1
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• 2003

This study was carried out to evaluate cytotoxic effects of Houttuynia cordata THUNB extracts on A549 (lung cancer), MDA-MB231 (breast cancer), SNU-C4 (colon cancer) and B16 (mouse melanoma) cell lines. We have determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide (MTT) assay. The 150 $\mu$g/$m\ell$ concentration of methanol extract (63.81 ％) of Houttuynia cordata THUNB was shown significantly antitoxic activity on A549 cell lines. (omitted)

• 동의생리병리학회지
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• 제17권5호
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• pp.1288-1292
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• 2003

This study was carried out to evaluate cytotoxic effects of Houttuynia cordata T/sub HUNB/ extracts on A549 (lung cancer), MDA-MB231 (breast cancer), SNU-C4 (colon cancer) and B16 (mouse melanoma) cell lines. We have determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide (MTT) assay. The 150 ㎍/㎖ concentration of methanol extract (63.81 %) of Houttuynia cordata T/sub HUNB/ was shown significantly antitoxic activity on A549 cell lines. The order of cytotoxicity fractions of methanol from Houttuynia cordata T/sub HUNB/ extracts against cancer cell lines in vitro is as follows : hexane fraction layer > chloroform fraction layer > ethyl acetate fraction layer > buthanol fraction layer > water fraction layer. These results suggest that the hexane fraction of methanol extract from Houttuynia cordata T/sub HUNB/ extract may be a valuable choice for the development of antitumor agents.

• Natural Product Sciences
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• 제8권3호
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• pp.100-102
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• 2002

Three lignans were isolated from a methanol extract of Lindera erytherocarpa Makino (Lauraceae) are evaluated in vitro cytotoxicity using three cancer cell line assay. The compounds were identified as methyllinderone (1), linderone (2), and kanakugiol (3) by spectroscopic methods. Amongst the compounds, methyllinderone (1) showed significant cytotoxicity against mouse melanoma (B16-FlO), human acetabulum fibrosarcoma (HT1080), and choronic myelogenous leukemia (K562) cancer cell lines with $ED_{50}$ values of 2.2, 2.5, 8.3 ${\mu}g/ml$, respectively.

• 대한수의학회지
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• 제34권4호
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• pp.769-779
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• 1994

The root of Bupleurum falcatum L.(BF) has been widely used in oriental medicine as a major camponent in many prescriptions for chronic hepatitis, renal disease, tuberculosis and some other infectious diseases. Many attempts have done to investigate the therapeutic effects of these principles. However, any kinds of screenig on immune regulatory- and antitumor- effects of BF has not been reported. The present study, therefore, was undertaken to investigate the BF-effects on cellular- and humoral-immune responses, phagocytic activities of macrophages, lymphokine- and Immunoglobulin(Ig)-production of lymphocytes, tumorigenesis of implanted sarcoma 180 cells and B16 melanoma cells, and proliferations of some tumor cell lines(Fsa II, 3LL and EL4). BF increased phagocytic activities of mouse peritoneal macrophages in a dose- and time-dependent fashion. Arthus reaction and antibody responses to SRBC were slightly enhanced but delayed hypersensitivity was depresed when BF was injected before- and after-SRBC sensitization. BF inhibited the proliferative responses of human tonsillar lymphocytes to PHA- and Con A-stimulation but slightly augmented the response of these cells to Staphylococcus aureus Cowan 1(SAC)-activation. Ig secretion of human mononuclear cells activated with SAC was slightly increased by BF. BF significantly augmented the SAC-induced IL 6 production of human mononuclear cells but not influenced Con Ainduced IL 2 secretion. NK cell activities of mouse splenocytes were somewhat increased when BF was pretreated and this responses were due to the increment of binding affinities of effector cells to target cells and of lytic activities of effector cells against target cells. In vitro BF significantly inhibited the proliferations of cancer cells such as Fsa II, 3LL and EL4 strains. BF decreased not only the frequency of tumor induction but also the tumor size per sarcoma 180 or B16 cell-implanted mouse. Taken together, these results indicate that BF is one of the potential immunomodulator, and suggest its possibility to be used as a desirable antitumor agent.

• 생약학회지
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• 제35권2호통권137호
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• pp.157-163
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• 2004

Twenty two polyphenols containing ten gallotannins, seven ellagitannins, two phenylpropanoids and three stilbenes isolated from the higher plants were tested inhibitory effects on melanogenesis in cultured B-16 mouse melanoma cell lines. Among the tested samples, 1-desgalloyleugeniin exhibited the most potent inhibitory effect on melanogenesis in cultured cell lines.

• 한국식품영양학회지
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• 제26권3호
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• pp.375-382
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• 2013

The present study is designed to explore an anti-tumor activity on crude extracts of Oplopanax elatus. Water extractions of Oplopanax elatus were performed at $100^{\circ}C$(OeE-100). OeE-100 doses up to $62.5{\mu}g/m{\ell}$ had no cytotoxicity on the tumor cell lines in vitro. In experimental lung metastasis of colon26-M3.1 carcinoma or B16-BL6 melanoma, the prophylactic intravenous ($4{\sim}100{\mu}g/mouse$) or oral (2 mg/mouse) administration of OeE-100 significantly inhibited tumor metastasis as compared with tumor controls. Peritoneal macrophages stimulated with OeE-100 produced various cytokines such as TNF-${\alpha}$, IL-6 and IL-12. In an analysis of NK-cell activities, i.v. administration of OeE-100 ($10{\sim}100{\mu}g/mouse$) significantly augmented the cytotoxicity to YAC-1 tumor cells. Vaccination of mice with boiling-treated tumor cells (BT-vaccine) in combination with OeE-100 ($100{\mu}g/mouse$) showed higher inhibitions in tumor metastasis when compared with the mice of BT-vaccine treatment. In addition, the splenocytes from OeE-100 admixed BT-vaccine immunized mice secreted a higher concentration of Th1 type cytokine such as IFN-${\gamma}$. These results suggested that the OeE-100 stimulated immune system and was a good candidate adjuvant of anti-tumor immune responses.

• 약학회지
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• 제42권4호
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• pp.382-387
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• 1998

Platycodon radix is a dried root of Platycodon grandiflorum (P. grandiflorum) A. DC, a perennial grown on the hills and fields in Korea and Japan, or cultivated in various districts. Recently, P. grandiflorum (Changkil) has been successfully cultivated for more than 20 years and generally has been employed as folk remedy for adult diseases such as hyperlipidemia, hypertension and diabetes. We investigated various biological activities of the extracts from Changkil. When treated in vitro with B16-F1 mouse melanoma cell lines, it showed 100% laminin-binding inhibitory activities at the concentration over 0.125mg/ml. In in vivo test it showed 61.5% reduction of the solid tumor weight transplanted in mice and exhibited anticancer activity of 128% ILS against Sarcoma-180 ascites. It also increased the ratio of positive cells of natural killer cells in lymphocytic composition against Sarcoma-18O ascites and solid tumor transplanted in ICR mice when tests were carried out by FACScan method.

• Molecules and Cells
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• 제41권2호
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• pp.73-82
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• 2018

Cancer preventive activities of green tea and its main constituent, (-)-epigallocatechin gallate (EGCG) have been extensively studied by scientists all over the world. Since 1983, we have studied the cancer chemopreventive effects of EGCG as well as green tea extract and underlying molecular mechanisms. The first part of this review summarizes groundbreaking topics with EGCG and green tea extract: 1) Delayed cancer onset as revealed by a 10-year prospective cohort study, 2) Prevention of colorectal adenoma recurrence by a double-blind randomized clinical phase II trial, 3) Inhibition of metastasis of B16 melanoma cells to the lungs of mice, 4) Increase in the average value of Young's moduli, i.e., cell stiffness, for human lung cancer cell lines and inhibition of cell motility and 5) Synergistic enhancement of anticancer activity against human cancer cell lines with the combination of EGCG and anticancer compounds. In the second part, we became interested in cancer stem cells (CSCs). 1) Cancer stem cells in mouse skin carcinogenesis by way of introduction, after which we discuss two subjects from our review on human CSCs reported by other investigators gathered from a search of PubMed, 2) Expression of stemness markers of human CSCs compared with their parental cells, and 3) EGCG decreases or increases the expression of mRNA and protein in human CSCs. On this point, EGCG inhibited self-renewal and expression of pluripotency-maintaining transcription factors in human CSCs. Human CSCs are thus a target for cancer prevention and treatment with EGCG and green tea catechins.

• 생약학회지
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• 제35권2호통권137호
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• pp.152-156
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• 2004

The bioassay-guided fractionation of the MeOH extract of the flowers of Magnolia denudata led us to the isolation of six compounds identified as fargesin(1), kobusin(2), aschantin(3), magnolin(4), rel-[7s,8s,8's]-3,4,3',4'-tetra- methoxy-9,7'- dihydroxy-8,8',7.O.9'-lignan(5) and oplodiol(6), respectively. Among the isolated compounds, fargesin(1) showed most potent inhibitory effect on the melanin polymer biosynthesis in cultured B-16 mouse melanoma cell lines$(IC_{50},\;45.7\;{\mu}M)$.

• 생약학회지
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• 제38권4호
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• pp.382-386
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• 2007

Cinnamomi Cortex (Lauraceae), the dried bark of Cinnamomum cassia BLUME, has been used as traditional Chinese medicine for its stomachic, astringent, carminative, antispasmodic, antibacterial, antifungal properties. Four compounds were isolated from the MeOH extract of Cinnamomi Cortex, and their structures were identified as trans-cinnamic acid (1), ${\beta}-sitosterol$ (2), bis(2-methylheptyl)phthalate (3), coumarin (4) by comparison of their physical and spectral data with those reported in the literature. These compounds were tested melanogenesis inhibitory effect on B-16 mouse melanoma cell lines. Among them, trans-cinnamic acid (1) showed the most potent inhibitory effect on melanogenesis with $IC_{50}$ value of $13{\mu}g/ml$. Arbutin, positive control, exhibited an $IC_{50}$ value of $29{\mu}g/ml$.