• 제목/요약/키워드: Lipoxygenase

검색결과 331건 처리시간 0.044초

Holographic Quantitative Structure-Activity Relationship (HQSAR) Study of 3,4-Dihydroxychalcone Derivatives as 5-Lipoxygenase Inhibitors

  • Gadhe, Changdev G.
    • 통합자연과학논문집
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    • 제4권3호
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    • pp.210-215
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    • 2011
  • Holographic quantitative structure-activity relationships (HQSAR) is a useful tool to correlates structures with their biological activities. HQSAR is a two dimensional (2D) QSAR methodology, which generates QSAR equations through 2D fingerprint and correlates it with biological activity. Here, we report a 2D-QSAR model for a series of fifty-one 3,4-dihydroxychalcones derivatives utilizing HQSAR methodology. We developed HQSAR model with 6 optimum numbers of components (ONC), which resulted in cross-validated correlation coefficient ($q^2$) of 0.855 with 0.283 standard error of estimate (SEE). The non-cross-validated correlation coefficient (r2) with 0.966 indicates the model is predictive enough for analysis. Developed HQSAR model was binned in to a hologram length of 257. Atomic contribution map revealed the importance of dihydroxy substitution on phenyl ring.

Anti-inflammatory Activities of Cinanamomum burmanni Bl

  • Khatib, Alfi;Kim, Mi-Yeon;Chung, Shin-Kyo
    • Food Science and Biotechnology
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    • 제14권2호
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    • pp.223-227
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    • 2005
  • Anti-inflammatory assay was conducted on 20 kinds of traditional Indonesian medicinal herbs using soybean lipoxygenase (SLO) and hyaluronidase (HAse). Cinnamomun burmanni Bl showed highest anti-inflammatory activity. Ethyl acetate fraction from methanol extract of C. burmanni Bl bark showing high SLO inhibitory activity was isolated using silica gel-60 column chromatography. Two compounds were isolated and purified through preparative HPLC. Through analyses of UV, $^1H-NMR$, $^{13}C-NMR$, EI-MS and $FAB^+-MS$, compounds 1 and 2 were identified as coumarin and 2-hydroxy cinnamaldehyde, respectively, among which 2-hydroxy cinnamaldehyde showed SLO inhibitory activity of $IC_{50}\;=\;60\;{\mu}M$. Both compounds did not exhibit HAse inhibitory activity.

Effects of Panax ginseng on Immune Hypersensitivity

  • Lee, E.;Lee, S.-Y.;Kim, Y.-R.;Kim, K.-M.
    • 한국응용약물학회:학술대회논문집
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    • 한국응용약물학회 1995년도 춘계학술대회
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    • pp.103-103
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    • 1995
  • There have been several reports regarding the effects of Panax ginseng on allergy reactions. However, they are very sporadic and no systemic yet. To study the effects of Panax ginseng on hypersensitivity, either ginseng total saponin (GTS, 200mg/kg, oral, two hours prior to experiments) or ethanol extract (50 and 200 mg/kg, oral, one week) was administered. Various parameters were employed to assess the anti-allergic actions of Panax ginseng 48hr passive cutaneous anaphylaxis (PCA), skin reactions, histamine release from rat peritoneal mast eel Is, and lipoxygenase activity. In 48hr PCA, and in skin reactions induced by chemical mediators (histamine, serotonin) and mediator releaser (compound 48/80), Panax ginseng did not suppress sensitized immune functions, rather showed tendency to increase the histamine-induced vascular permeabi1ity. Panax ginseng did not inhibit lipoxygenase activity either.

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생리활성과 분자구조의 상관관계에 관한 연구 (The Studies in Relationship between Molecular Structure and Biological Activities)

  • 김의락;민경섭;김종토;정봉진
    • 대한화학회지
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    • 제37권1호
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    • pp.68-75
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    • 1993
  • 분자구조를 기술하는 molecular connectivity index, Wiener index 및 ad hoc descriptor와 알코올, 에스테르, 케톤 화합물들이 생체내에서 나타내는 enzyme inhibitory potency, lipoxygenase inhibition, tadpole narcosis potency, 증기독성(vapor toxicity), 증발열(heat of vaporization)과 같은 성질들 사이의 상관관계를 조사하였다. 생물학적 활성의 종류에 따라 molecular descriptor 사이의 우열은 있으나, 대체로 좋은 상관관계식을 얻었다.

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불가사리 부타놀 분획의 항알러지 활성 (Anti-allergic Activity of Butanol Fraction of Asterias amurensis)

  • 양주혜;나민균;장현욱
    • 약학회지
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    • 제55권4호
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    • pp.295-300
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    • 2011
  • We investigated the effects of butanol fraction of Asterias amurensis (BFA) on the anti-allergic activity. BFA inhibited both cyclooxygenase-2 dependent prostaglandin $D_2$ and 5-lipoxygenase dependent leukotriene $C_4$ generation in a concentration-dependent manner with $IC_{50}$ values of 174.6 and 22.2 ${\mu}g$/ml, respectively. In addition, BFA also inhibited the degranulation in a dose dependent manner. Furthermore, oral administration of BFA inhibited IgE-mediated passive cutaneous anaphylaxis in mice. These results suggested that BFA may be useful in regulating mast cell-mediated allergic diseases.