• 제목/요약/키워드: natural products

검색결과 4,318건 처리시간 0.06초

Anti-angiogenic and anti-tumor activity of 2′ -hYdroxy-4′ -methoxychalcone

  • Jung, Sang-Hoon;Lee, Yeon-Sil;Lee, Sang-Hyun;Lim, Soon-Sung;Kim, Yeong-Shik;Shin, Kuk-Hyun
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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    • pp.359.2-359.2
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    • 2002
  • In the previous study, we reported that 2'-hydroxy-4'-methxoychalcone, synthetic chalcone inhibited PGE2 production in TPA- stimulated rat peritoneal macrophages by inhibiting the induction of COX-2 protein. The present study was carried out to clarify whether 2'-hydroxy-4'-methoxychalcone inhibit angiogenesis by the experimental methods in vitro and in vivo. 2'-Hydroxy-4'-methoxychalcone decreased angiogenesis of both chick embryos in the chorioallantoic membrane assay and basic fibroblast growth factor-induced vessel formation inthe mouse Martigel plug assay. (omitted)

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Platelet Anti-aggregating Triterpene and Sterol Constituents from the Leaves of Acanthopanax senticosus

  • Jin, Jing-Ling;Lee, Sang-Hyun;Lee, Yong-Yook;Kim, Jeong-Mi;Heo, Jung-Eun;YunChoi, Hye-Sook
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.206.1-206.1
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    • 2003
  • From methanol extract of Acanthopnanax senticosus, six platelet anti-aggregating compounds, chiisanogenin (1), chiisanoside (2), ursolic acid (3), oleanolic acid (4), b-sitosterol (5) and daucosterol (6) were isolated. All of the isolated compounds showed dose-dependent inhibitory activities to rat platelet aggregation induced by all the agonist employed. Compound 1 showed about 50 folds higher potency than acetylsalicylic acid (ASA) on U46619 induced platelet aggregation (IC$\sub$50/ : 6.21 ${\mu}$M) and 10 ∼ 20 folds higher effect than ASA on epinephrine and arachidonic acid (AA) induced aggregation (IC$\sub$50/ ; 2.50 and 4.81 ${\mu}$M, respectively). (omitted)

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Constituents from the roots of Hemerocallis fulva

  • Kim, Ju-Sun;Sik, Kang-Sam;Ho, Son-Kun;Wook, Chang-Hyeun;Kim, Hyun-Pyo;Bae, Ki-Hwan
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.196.1-196.1
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    • 2002
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Effects of BuOH Extract of the Root of Aralia elata as an Absorption Enhancer on the Transport of Chondroitin Sulfate and Its Digestion Products In Vitro and In Vivo

  • Sim, Joon-Soo;Li, Da-Wei;Cho, Hai-Lim;Cho, So-Yean;Jeong, Choon-Sik;Lee, Eun-Bang;Kim, Yeong-Shik
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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    • pp.415.2-415.2
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    • 2002
  • We investigated the absorption enhancing effect of BuOH extract of the root of Aralia elata (BERAE) in Caco-2 cell monolayers and rats. At the concentration of both 0.04% and 0.08% (w/v). BERAE decreased the transepithelial electrical resistance (TEER) values and increased the permeability of intact chondroitin sulfate (CS) and its digestion products as hydrophilic macromolecules in a dose dependent manner. We also evaluated the cytotoxicity of BERAE for the determination of a proper concentration as an absorption enhancer. (omitted)

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Diterpene Constituents from Aster oharai

  • Kwon, Hak-Cheol;Yi, Jae-Hun;Lee, Kang-Ro
    • 대한약학회:학술대회논문집
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    • 대한약학회 2000년도 NEW STRATEGY FOR DRUG DEVELOPMENT IN POST-GENOMIC ERA(대한약학회)
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    • pp.238.1-238.1
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    • 2000
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