• 제목/요약/키워드: chemopreventive

검색결과 488건 처리시간 0.026초

Effect of Resveratrol on Coxsackie Virus B3m-induced Myocarditis in Mice

  • Dong Hao-Han;He-Li Ren
    • 한국식품영양과학회:학술대회논문집
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    • 한국식품영양과학회 2004년도 Annual Meeting and International Symposium
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    • pp.116-121
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    • 2004
  • To observe the intervening effect of resveratrol on coxsackie virus B3m-induced myocarditis in Balb/c mice and explore the mechanism of intervening effect. Using an animal model of viral myocarditis induced by coxsackie virus B3m (CVB3m), with Ribavirin and Astragalan as comparison, to examine the changes of general condition, mortality, the weights of heart, liver and spleen, serum MDA and NO levels, and cardiac histology in Balb/c mice. By comparison with Ribavirin and Astragalan, it was found that in the mice model of viral myocarditis induced by coxsackie virus B3m resveratrol significantly improved the changes of general condition, mortality, the weights of heart, liver and spleen, serum MDA and NO levels, and cardiac histology. It suggested that resveratrol may have some chemopreventive and chemotherapeutic effects in the treatment of viral myocarditis.

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Development of TPA-induced Ornithine Decarboxylase (ODC) Inhibitors from Plants as Cancer Chemopreventive Agents

  • Kim, Soo-Jeong;Lee, Ik-Soo;Chang, Il-Moo;Mar, Woong-Chon
    • Natural Product Sciences
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    • 제2권2호
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    • pp.123-129
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    • 1996
  • Chemical carcinogenesis is associated with the increase of intracellular polyamine levels, and 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced mouse epidermal ODC activity are essential to skin tumor promotion by TPA. Therefore, for the discovery of new cancer chemopreventive agents, we have evaluated about 73 kinds of natural products to study inhibitory effects against ODC activity induced by TPA in T24 cell culture system. The total methanol extracts of plants fractionated into three layers (hexane, ethyl acetate and water layer) were tested and the hexane fraction of Angelica gigas $(root\;bark,\;IC_{50}:\;7.4\;{\mu}g/ml)$ and the ethyl acetate fraction of Corydalis ternata $(root,\;IC_{50}:\;7.5\;{\mu}g/ml)$ were the most effective on the inhibition of TPA-induced ODC activity, These active fractions are under investigation with further sequential fractionation using column chromatography.

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Effective Chemopreventive Activity of Genistein against Human Breast Cancer Cells

  • Shon, Yun-Hee;Park, Sun-Dong;Nam, Kyung-Soo
    • BMB Reports
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    • 제39권4호
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    • pp.448-451
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    • 2006
  • Chemopreventive and cytotoxic effect of genistein against human breast cancer cell lines was investigated. Genistein inhibited cell proliferation in estrogen receptor-positive (MCF-7) and estrogen receptor-negative (MDA-MB-231) human breast carcinoma cell lines. Cytochrome P450 (CYP) 1A1-mediated ethoxyresorufin O-deethylase (EROD) activity was inhibited by genistein in a concentrationdependent manner. Genistein significantly inhibited 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced cyclooxy-genase-2 activity and protein expression at the concentrations of 10 (p < 0.05), 25 (p < 0.05) and 50 mM (p < 0.01). In addition, ornithine decarboxylase (ODC) activity was reduced to 53.8 % of the control after 6 h treatment with 50 mM genistein in MCF-7 breast cancer cells. These results suggest that genistein could be of therapeutic value in preventing human breast cancer.

Quercetin 및 Quercetin 배당체들의 유전독성억제효과 (Antigenotoxicity of Quercetin and its Glycosides)

  • 허문영;김정한
    • 한국식품위생안전성학회지
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    • 제11권2호
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    • pp.115-121
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    • 1996
  • In order to compare the suppressive effect of quercetin and several its glycosides, such as quercitrin (quercetin-3-rhamnoside), isoquercitrin (quercetin-3-glucoside), hyperin (quercetin-3-galactoside) and tutin (quercetin-3-rhamnosyl glucoside), on the genotoxicity by N-methyl-N-nitrosourea(MNU), in vitro sister chromatid exchange(SCE) test using mouse spleen lymphocytes and in vivo micronucleus test using mouse peripheral blood were performed. MNU-induced SCEs in vitro were not decreased by the simultaneous treatment of test compounds. Among them, quercetin and hyperin showed significant suppressive effects at high dose(10-5M). On the other hand, MNU-induced micronucleated reticulocytes(MNRETS) in vivo were significantly decreased with good dose-dependent manner in all compound tested. However, there were not significant differences between quercetin aglycone and its glycosides in the suppressive aglycone and its glycosides may act as an antigenotoxic agent in vivo and may be useful as a chemopreventive agent of alkylating agent.

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INHIBITION OF CYCLOOXYGENASE-2 AND INDUCIBLE NITRIC OXIDE SYNTHASE BY SELECTED CHEMOPREVENTIVE PHYTOCHEMICALS VIA THE NF-$\textsc{k}$ B SIGNALING PATHWAY

  • Surh, Youna-Joon;Chun, Kyung-Soo;Lee, Ji-Yoon;Han, Seong-Su;Keum, Young-Sam;Seo, Hyo-Joung;Lee, Jeong-Hee;Park, Kwang-Kyun;Lee, Sang-Sup
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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    • pp.31-32
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    • 2001
  • A wide array of phenolic substances, particularly those present in dietary and medicinal plants, have been reported to possess substantial anticarcinogenic and antimutagenic activities. The majority of naturally occurring phenolics retain antioxidative and anti-inflammatory properties which appear to contribute to their chemopreventive or chemoprotective activity. Inducible cyclooxygenase (COX-2) and nitric oxide synthase (iNOS) are important enzymes that mediate inflammatory processes.(omitted)

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