• 한국미생물·생명공학회지
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• 제50권2호
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• pp.218-227
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• 2022

Glycosylation of aesculetin was performed using amylosucrase from the hyperthermophilic bacterium Deinococcus geothermalis DSM 11300 to improve the solubility and biological activity of aesculetin. A newly synthesized aesculetin glycoside was identified as α-cichoriin (aesculetin 7-α-D-glucoside) by nuclear magnetic resonance analysis. The solubility of α-cichoriin was 11 times higher than that of aesculetin because of the attached glucose moiety. Aesculetin and α-cichoriin had no significant effect on the proliferation of normal cells, such as RAW 264.7, but they showed a cell proliferation inhibitory effect on B16F10 melanoma cells. Unlike treatment with aesculetin and α-cichoriin, aesculin (aesculetin 6-β-D-glucoside) showed no antiproliferative activity in B16F10 cells. Based on the molecular structures of aesculin and α-cichoriin, the position where glucose binds to aesculetin and the anomeric configuration between glucose and aesculetin are thought to be important for exerting an antiproliferative effect on the B16F10 cell line. Based on these results, we propose that α-cichoriin, the α-glycosylated form of aesculetin, may serve as a model for developing phytochemical analogs with therapeutic potential for the treatment of diseases associated with tumor cell proliferation without cytotoxicity to normal cells.

• Bulletin of the Korean Chemical Society
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• 제30권9호
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• pp.2027-2031
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• 2009

The synthesis of a new series of diarylureas and amides having a 1-substituted-3-(3-chloro-5-methoxyphenyl)-4- pyridinylpyrazole scaffold is reported here. The in vitro antiproliferative activities of these diaryl derivatives against human melanoma cell line A375 were tested and the effect of substituents on the phenyl ring was investigated. Most of the newly synthesized compounds generally showed superior or similiar activity against A375 to Sorafenib. Among these compounds, IId, IIg and IIh showed excellent activity against A375 compared to Sorafenib.

• Food Science and Biotechnology
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• 제18권3호
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• pp.818-821
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• 2009

Total phenol, total flavonoid, reducing powder, electron donating activity, ascorbic acid equivalent antioxidant capacity, antimicrobial and antiproliferative activities of olive leaf extracts were investigated. The contents of total phenol and flavonoid were 257.48 and 92.33 mg in 100 g of olive leaf extract, respectively. The reducing power of the olive leaf extract increased with concentration increasing. Electron donating activity was high in 100 ${\mu}g/mL$ treated olive leaf extract as 95.20%. The ascorbic acid equivalent antioxidant capacity of the olive leaf extract was 68.93 mg/g olive leaf extract. The olive leaf extracts showed relatively high antimicrobial activity against Escherichia coli, Salmonella typhimurium, Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, and Pseudomonas aeruginosa. All of the cancer cell lines including MKN45, HCT116, NCI-H460, and MCF7 have 70-81% as effective growth inhibition.

• 대한화학회지
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• 제64권1호
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• pp.7-18
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• 2020

An efficient and facile procedure has been developed for the synthesis of novel bichalcone derivatives (4a, 4b). The key step contains the solvent-free aldol synthesis of bichalcones based on quinones. Bichalcones (4a, 4b) were used as precursors for the synthesis of some interesting heterocyclic compounds like, diazepines (5a, 5b), pyrazolo-pyrimidines (7a, 7b), and pyrazoline derivatives (8a, 8b). Moreover, new thioxopyrimidine derivatives (9a, 9b) were furnished and used as a functionalizing agent to produce the triazole-pyrimidines (11, 12) and the carbonitrile derivative (14). All the synthesized compounds were fully characterized using physical and spectral data like, FT-IR, ¹H NMR, ¹³C NMR, and MS. Bichalcones (4a, 4b) and diazepines (5a, 5b) were screened for their anticonvulsant activity, where compounds (4a, 5a, and 5b) revealed potent anticonvulsant activity compared to diazepam. On the other hand, some of the prepared compounds were screened for their antiproliferative activity and they showed significant cytotoxic effects on most of the cancer cell lines with regard to broad spectrum antitumor activity.

• 약학회지
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• 제54권5호
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• pp.328-333
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• 2010

Comparative molecular field analyses (CoMFA) on the antiproliferative activity of N-substituted (R) 2-amino-5-(2,4-dihydroxyphenyl)-1,3,4-thiadiazole analogues (ADTs: 1-17) against bladder cancer (HCV29T) and rectal cancer (SW707) cells were studied quantitatively. The statistical predictability and fitness of CoMFA A1 model for bladder cancer cells were better than those of CoMFA F1 model for rectal cancer cells and the antiproliferative activity of ADTs depends on steric field (HCV29T: 93.1% & SW707: 83.8%). Also, from the contour maps of optimized CoMFA models, the activity for bladder cancer cells had predicted to increase when sterically favored groups were substituted on meta- and para-position, and sterically disfavored groups were substituted on one ortho-position of phenyl ring. The activity for rectal cancer cells had predicted to increase when sterically favored groups were substituted on para-position, and sterically disfavored groups were substituted on two ortho-position of phenyl ring as R-group.

• Bulletin of the Korean Chemical Society
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• 제29권11호
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• pp.2231-2236
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• 2008

• Archives of Pharmacal Research
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• 제23권3호
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• pp.206-210
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• 2000

A new series of phosphonate side chain analogues of 1$\alpha$,25-dihydroxyvitamin $D_3$ (1) have been synthesized. Antiproliferative activities of theses analogues (8a,b and 9a,b) using human keratinocyte cell shows that analogues which have natural A-ring show higher activity than unnatural A-ring series and almost equally active to 1 $\alpha$,25-Dihydroxyvitamin $D_3$(1) at 1 $\mu$M level.

• 한국약용작물학회지
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• 제24권1호
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• pp.14-20
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• 2016

Background : This study aimed to investigate the antioxidant and antiproliferative activities of extract from different parts of water chestnut (Trapa japonica Flerow). Methods and Results : The total polyphenol content of pericarp and seed extract was 438.31 mg/g and 25.32 mg/g respectively. DPPH radical scavenging assay showed that the half maximal inhibitory concentration ($IC_{50}$ values) of pericarp and seed extract were $5.28{\mu}g/m{\ell}$ and $355.51{\mu}g/m{\ell}$ respectively. In addition, the pericarp extract showed strong reducing power. In the MTT assay, the pericarp extract significantly inhibited the viability of A549, AGS, HeLa, PC-3, HCT116, HT29 and SW620 cell lines compared with the seed extract. Conclusions : These results suggest that T. japonica Flerow extracts have significant antioxidant and antiproliferative activity.

• Natural Product Sciences
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• 제12권2호
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• pp.109-112
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• 2006

The chloroform-soluble fraction of the vinegar treated small black soybean [Glycine max (Leguminosae)] showed antiproliferative activity against human myeloid leukemia HL-60 cells, in terms of inhibition of proliferation and induction of apoptosis. Bioassay-guided chromatography of the chloroform-soluble fraction resulted in the isolation of two isoflavonoid compounds, genistein and daidzein, as active principles. Genistein showed more potent antiproliferative effects against HL-60 cells. Treatment of HL-60 cells with genistein induced apoptosis in a dose dependent manner. Apoptosis was judged by the detection of DNA fragmentation by a flow cytometry and the degree of apoptosis was assayed by RT-PCR.

• Food Science and Biotechnology
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• 제17권6호
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• pp.1235-1239
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• 2008

To study the health promoting effects of medicinal plants, 30 medicinal plants commonly available in Korea have been evaluated for their antioxidant compounds and antioxidant and antiproliferative activities. Total polyphenolics and flavonoids in the methanolic extracts were measured by spectrophotometric methods and 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging activities and chelating effects have been determined for antioxidant activities. Moreover, the effects of medicinal plants on cell proliferation of intestinal (Caco-2) and pituitary (GH3) tumor cells were investigated using thiazolyl blue terazolium bromide (MIT) assay. The methanolic extracts of Pueraria thunbergiana and Artemisiae asiatria contained the highest total polyphenolic and flavonoid contents, respectively. P. thunbergiana exhibited the highest antioxidant activities. A. asiatria showed the strongest antiproliferative activity against Caco-2 and Ponciruc trifoliata Rafin and Lophathrum gracile Bronghiart exhibited the highest activities against GH3. Although there was positive correlation between ABTS radical scavenging activity and polyphenolic contents ($R^2=8189$), no relationship was found between antiproliferative and antioxidant activities.