Abstract:
An octadecatetraenoyl glycerol compound or a pharmaceutically acceptable derivative thereof is provided to prevent and treat inflammatory diseases, allergies, and asthma by inhibiting an activity of 5-lipoxygenase and showing a strong inhibitory activity against phospholipase A2. An octadecatetraenoyl glycerol compound or a pharmaceutically acceptable derivative thereof has a structure represented by the formula (A). A method for separating the octadecatetraenoyl glycerol compound includes the steps of: (1) extracting Sargassum sagamianum with water or methanol to obtain a crude extract; (2) evaporating a solvent of the crude extract under reduced pressure to obtain a residue, and obtaining fractions from the residue according to polarities thereof; and (3) evaporating a solvent of the fractions to obtain an organic concentrate, and then purifying and isolating the organic concentrate by chromatography.
Abstract:
An extract of Sargassum sagamianum is provided to inhibit the activity of 5-lipoxygenase(5-LO) and generation of cyclooxygenase-2(COX2-) dependent prostaglandin D2(PGD2) and show strong inhibitory activity on phospholipase A2, thereby being usefully used for preventing or treating inflammation, allergy and asthma. A pharmaceutical composition for preventing and treating rheumatoid arthritis, allergic rhinitis, allergic asthma or allergic dermatitis comprises 0.1-50 wt.% of an extract of Sargassum sagamianum using a solvent of methanol, dichloromethane or acetone as an effective ingredient. A health functional food for preventing and treating rheumatoid arthritis, allergic rhinitis, allergic asthma or allergic dermatitis comprises the extract of Sargassum sagamianum.
Abstract:
PURPOSE: Provided is a skin whitening agent containing sophoraflavanone G, derivatives thereof and a sophorae radix extract containing the same which directly inhibit tyrosinase activity, reduce the amount of melamine in melanoma cells and have low toxicity. CONSTITUTION: The skin whitening agent composition contains sophoraflavanone G represented by the formula(1) and a derivative thereof as an active ingredient. A sophorae radix extract is obtained by extraction in a single or two or more mixed solvents selected from water, C1-4 lower alcohol, glycerol, propylene glycol, 1,3-butylene glycol, ethyl acetate, benzene, hexane and diethyl ether. The sophorae radix extract contains the sophoraflavanone G and derivatives thereof.
Abstract:
A fatty acid glycerol derivative is provided to inhibit the formation of cyclooxygenase-2-dependent prostaglandin D2, to ensure a strong inhibitory activity against phospholipase A2, thereby preventing and treat inflammatory diseases, allergies, and asthma. A method for preparing a compound of the structural formula (B) and a palmitoyl glycerol, stearoyl glycerol, oleoyl glycerol, linoleoyl glycerol, gamma-linolenoyl glycerol, alpha-linolenoyl glycerol, dihomo-gamma-linolenoyl glycerol, eicosapentaenoyl glycerol, adrenoyl glycerol, or docosahexaenoyl glycerol derivative compound includes the steps of: (1) condensing a fatty acid of the formula (I) and a cyclized glycerol of the formula (II) to obtain an ester of the formula (III); purifying the ester compound by chromatography; (3) decyclizing the pured ester with a boric acid as a reducing agent to synthesize fatty acid glycerol of the formula (IV); and (4) purifying the synthesized compound by chromatography.