• 제목/요약/키워드: down-regulation

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우묵사스레피의 항암효과 및 작용기전 (Anti-cancer Effects and Action Mechanism of Eurya emarginata)

  • 강희경
    • 한국응용약물학회:학술대회논문집
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    • 한국응용약물학회 2003년도 춘계학술대회
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    • pp.39-55
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    • 2003
  • 1. Extracts of the leaves of Eurya emarginata markedly inhibited the growth of leukemia cells such as HL-60, KG-1, U937, K562, and Jurkat. 2. When HL-60 cells were treated with the extract, DNA fragmentation, morphological changes and sub-G1 hypodiploid cells were observed. The expressions of c-myc mRNA were also dramatically decreased. 3. Cornoside and Eutigoside were isolated from the leaves of Eurya emarginata. 4. Eutigoside induced apoptosis through down-regulation of Bcl-2 expression and activation of caspases.

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Recent Advances in Anti-inflammatory Flavonoid Research since 2004

  • Kim Hyun-Pyo
    • Biomolecules & Therapeutics
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    • 제14권1호
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    • pp.11-18
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    • 2006
  • Certain flavonoids possess anti-inflammatory activity. Besides their antioxidative property, the cellular action mechanisms of flavonoids include an inhibition of arachidonate metabolizing enzymes such as cyclooxygenases and lipoxygenases, and a down-regulation of proinflammatory gene expression such as cyclooxygenase-2, inducible nitric oxide synthase and tumor necrosis factor-$\alpha$. In this review, the recent findings of anti-inflammatory flavonoid research since 2004 were summarized. And the cellular mechanisms on signal transduction pathways were also discussed.

DOWN-REGULATION OF RAF-1 KINASE IS ASSOCIATED WITH PACLITAXEL RESISTANCE IN HUMAN BREAST CANCER MCF-7/ADR CELLS

  • Lee, Michael;Jung Kwon;Wayne B. Anderson;Chung, Moon-Koo
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2002년도 Molecular and Cellular Response to Toxic Substances
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    • pp.136-136
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    • 2002
  • Experiments were carried out to determine the role of Raf-1 kinase in the development of drug resistance and apoptosis induced by paclitaxel. In the present study, paclitaxel sensitivity, Raf-1 activity and MAPKs activation were compared in 2 cell lines: parental human breast cancer cells and its drug resistant variant (MCF-7/Adr) cells.(omitted)

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Flavonoid and Skin Inflammation

  • Kim, Hyun-Pyo
    • 한국응용약물학회:학술대회논문집
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    • 한국응용약물학회 2007년도 Proceedings of The Convention
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    • pp.67-73
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    • 2007
  • There have been various inflammatory skin disorders in humans including atopic dermatitis, eczema and psoriasis. Although some drugs have been used for these disorders, there is an urgent need for safer and more effective topical anti-inflammatory agents. Plant flavonoids possess anti-inflammatory activity and some of them have multiple pharmacological mechanisms, inhibition of eicosanoid metabolizing enzymes, histamine release and/or down-regulation of pro inflammatory gene expression. These properties of flavonoids may be suitable for treating chronic skin inflammatory disorders. Especially, wogonin, some prenylated flavonoids and biflavonoids have a strong potential as new anti-inflammatory agents by topical application.

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