• Archives of Pharmacal Research
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• v.17 no.2
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• pp.115-118
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• 1994

This paper describes the isolation of isoguanosine from Croton tiglium L. and its cytotoxic effect anginst several tumor cell lines in culture and newly reports that isoguanosine has an antitumor activity against implanted S-180 ascitic turmor mice. Isoguanosine is effective at the dose of $24mg/kg/day{\times}5$, with T/C value of 168%. Isoguanosine inhibits the gorwth of S-180 and Ehrich solid tumor in mice at the optimal doses of $96\; mg/kg/day{\times}12$ and $48\;mg/kg/day{\times}12$, with 1-T/C values of 65% and 60% respecively.

• Advances in Traditional Medicine
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• v.4 no.1
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• pp.49-52
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• 2004

The total alkaloid fraction of the methanolic extract of Solanum pseudocapsicum unripe fruits was tested for its in-vivo anticancer activity against Dalton's Lymphoma Ascites model in mice. The total alkaloid fraction at 5.0 and 10.0 mg/kg body weight showed significant increase in the mean survival time and the percentage increase in the life span of tumor bearing mice. The increase in the body weight was found to be less than that of the control. However, the treatment at 20 mg/ kg body weight was found to be toxic and showed a decrease in the mean survival time, and body weight when compared to control mice. The antitumor activity observed may be due to the cytotoxic activity of the total alkaloid fraction.

• Proceedings of the Korean Biophysical Society Conference
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• 1999.06a
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• pp.32-32
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• 1999

Cecropin A(1-8)-magainin 2(1-12) and cecropm A(1-8)-melittin(1-12) hybrid peptides were known to have potent antitumor and antibacterial activity. In particular, cecropm A(l-8)-magainin 2(1-12) has powerful antibacterial and antitumor activity with no hemolytic effect.(omitted)

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.354.2-354.2
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• 2002

Fifty of 3.4-diaryl-2(5H)-furanone derivatives were synthesized and evaluated for their cytotoxicity in a small panel of cancer cell lines. Eleven compounds in this series, were found to have significant cytotoxic activities with ED$_{50}$ values of less than 1 4{\mu}$M in most of the cell lines tested. Compound RTMSI, 3-(3.4, 5-trimethoxyphenyl)-4-(3-amino-4-methylamino)-2(5H)-furanone exhibited the most potent cytotoxic activity with ED$_{50}$ value of 0.003 4{\mu}$M and antitumor activity on BDF1 mice bearing Lewis lung carcinoma cells with inhibition ratio of 72 %.%.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.307.2-308
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• 2002

Acharan sulfate. a new glycosaminoglycan(GAG) isolated from the giant African snail Achatina fulica. was shown to have antitumor activity in vivo. To elucidate the mechanisms for the antitumor activity. we examined its impact on professional antigen presenting cells such as macrophages and dendritic cells (DCs). Acharan sulfate stimulated cytokine production (TNF-a and IL -1b). nitric oxide release. and morphological changes in a dose dependent manner on a macrophage cell Line Raw 264.7 cells. The differentiation-inducing activity of acharan sulfate was examined on immature DCs. Immature DCs were generated from mouse bone marrow (BM) cells by culturing with GM-CSF and IL-4, and then stimulated with acharan sulfate. The resultant DCs were then examined for funcional and phenotypic properties. It was found that acharan sulfate could induce functional maturation of immature DCs as determined by increased allogenic mixed lymphocyte reaction (MLR) and IL-12 production. Phenotypic. analysis for the expression of class II MHC molecules and major co-stimulatory molecules such as B7-1, B7-2 and CD40 also confirmed that acharan sulfate could induce maturation of immature DCs. These results suggest that that the antitumor activity of acharan sulfate is at least in part due to activation adn induction of differentiation of professinal antigen presenting cells. (omitted)

• IMMUNE NETWORK
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• v.12 no.6
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• pp.253-260
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• 2012

${\alpha}$-Mangostin is a xanthon derivative contained in the fruit hull of mangosteen (Garcinia mangostana L.), and the administration of ${\alpha}$-Mangostin inhibited the growth of transplanted colon cancer, Her/CT26 cells which expressed Her-2/neu as tumor antigen. Although ${\alpha}$-Mangostin was reported to have inhibitory activity against sarco/endoplasmic reticulum $Ca^{2+}$ ATPase like thapsigargin, it showed different activity for autophagy regulation. In the current study, we found that ${\alpha}$-Mangostin induced autophagy activation in mouse intestinal epithelial cells, as GFP-LC3 transgenic mice were orally administered with 20 mg/kg of ${\alpha}$-Mangostin daily for three days. However, the activation of autophagy by ${\alpha}$-Mangostin did not significantly increase OVA-specific T cell proliferation. As we assessed ER stress by using XBP-1 reporter system and phosphorylation of $eIF2{\alpha}$, thapsigargin-induced ER stress was significantly reduced by ${\alpha}$-Mangostin. However, coadministration of thapsigargin with ${\alpha}$-Mangostin completely blocked the antitumor activity of ${\alpha}$-Mangostin, suggesting ER stress with autophagy blockade accelerated tumor growth in mouse colon cancer model. Thus the antitumor activity of ${\alpha}$-Mangostin can be ascribable to the autophagy activation rather than ER stress induction.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.4
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• pp.1059-1064
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• 2003

Oldenlandiae Herba has been used for the prevention or treatment of cancer in oriental medicine for years. Experimentally its antitumor activity was reported. However, in order to develop new Korean original plants. we tried to study the antitumor activity of Chinese and Korean origin Oldenlandiae Herba. We first evaluated the cytotoxicity of Oldenlandiae Herba originated from China and Korea on HT1080, U937 and SK-mel tumor cells. MeOH extract of Chinese Oldelandiae Herba was more effective than MeOH extract of Korean Oldenlandiae Herba. Approixmately IC50 of two species of Oldelandiae Herba was 380-450 ug/ml. For evaluation of antiangiogenic activity, proliferation assay with HUVECs(Human umblical vein endothelial cells) was done with three samples. Chinese Herba and Korean Herba and root. Korean root and herba was more effective than Chinese Herba. Thus, we found Korean Oldenlandiae was more effective on angigenic activity than Chiness Oldenlandiae. In an anlytical study on effective compounds from Oldenlandiae, the spot of ursolic acid was more marked by Korean Oldenlandiae than by Chinese Oldenlandiae. whereas the spot of asperuloside was more pronounced by Chinese Oldenlandiaethan by Korean Oldenlandiae by TLC analysis.

• Korean journal of food and cookery science
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• v.29 no.5
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• pp.573-580
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• 2013

We investigated the physiological activities of extracts from Lindera obtusiloba Blume leaf and twig (LLW: water extract from Lindera obtusiloba Blume leaf, LLE: 50% ethanol extract from Lindera obtusiloba Blume leaf, LTW: water extract from Lindera obtusiloba Blume twig, LTE: 50% ethanol extract from Lindera obtusiloba Blume twig). Total polyphenol and total flavonoid contents of LTE were 445.38 mg/g and 302.09 mg/g, respectively. The electron donating ability (95.38%) of LTE was higher than that of the LLE (93.76%), LTW (88.09%), and LLW (82.06%). The oxygen radical absorbance capacity of extracts were improved with 50% ethanol condition, rather than hot water. Superoxide radical scavenging activity and FRAP activity of the extracts were improved with an increase of treatment concentration. All the extracts($1,000{\mu}g/mL$) stimulated a production of nitric oxide (NO) in macrophage RAW264.7 cells. In particular, the NO stimulating activity of LTE was superior to that of LLE, LTW, and LLW. The antitumor activity of LTE ($500{\mu}g/mL$) in A549, HeLa and SNU719 was 55.63%, 83.87% and 68.11%, respectively. The UVB-induced MMP-1 production in HS68 cells was suppressed by the treatment of LTE (88.28%), LLE (83.96%), LTW (80.59%) and LLW (76.08%).

• YAKHAK HOEJI
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• v.19 no.1
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• pp.1-8
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• 1975

• Proceedings of the Plant Resources Society of Korea Conference
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• 1995.01a
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• pp.45-47
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• 1995