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2015年 日本生薬学会 ポスター
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2015年 日本生薬学会 ポスター
1.
HMG-CoA コレステロール低下作用を有する 熱帯産薬用植物の成分に関する研究 (岐大応生) ○高橋 祐貴、光永
徹 ジャムウ ・・・インドネシアにおいて古くから庶民の間で 受け継がれてきた伝統的治療薬 サプリメントや嗜好品 既にコレステロール低下作用を 有することが明らかとなっている 活性成分の詳細が不明!! HMGCR阻害活性成分を特定 抗高脂血症薬への応用 Guazuma ulmifolia 薬草名(インドネシア):Jati Belanda 科名:アオギリ科 主要成分(葉):カフェイン(アルカロイド) ファルネソール(セスキテルペン) プロアントシアニジン(タンニン) 主な薬理作用: コレステロール低下作用,抗菌作用,血圧低下作用 商品化 阻害成分 最も強い活性が認められたCompound Bを MALDI-TOF-MSおよびNMRによって同定 メタノール抽出物のHPLCデータ Liquid chromatograph:SHIMADZU LC-20AD Diode array detector:SHIMADZU SPD-M20A Column oven:SHIMADZU CTO-20AC Communication bus modules:SHIMADZU CBM-20A Degasser:SHIMADZU DGU-20A₃ Auto sampler:SHIMADZU SIL-20A Column:Sunniest C18.5µm(4.6φ×250mm) Column:Sunniest C18.5µm(4.6φ×250mm) Detector wavelength:280nm Flow late:1.0ml/min Gradient program:MeOH:0.05%TFA aq.=10%:90%(0min)→90%:10%(60min)) Analysis time:80min 50%エタノール水抽出物のHPLCデータ M Fr.13から4成分を 単離することに成功 Compound A~Dの全てが バニリン塩酸陽性 プロアントシアニジンの 存在を示唆 HPLC分析および定性試験 【実験方法】 単離化合物のHMGCR阻害活性 天然物由来成分としては比較的強い活性 初めて(-)-EpicatechinにHMGCR阻害活性を確認 機能性食品や医薬などとしての応用価値有り 構造解析 Pravastatin 抽出 ・ 分画 【結果と考察】 HMG-CoA還元酵素 (HMGCR) コレステロール生合成経路【緒言】 HMGCR阻害アッセイ 2 H⁺ 2 NADPH CoASH 2 NADP⁺ メバロン酸 340nmに吸収をもつ HMGCR 終濃度が100µg/mlとなるように各単離化合物を緩衝液に溶解 吸光度の変化量で 阻害率を算出