JP2006151902A - 癌転移抑制用トリテルペン誘導体及び該トリテルペン誘導体を用いた癌転移抑制用組成物 - Google Patents
癌転移抑制用トリテルペン誘導体及び該トリテルペン誘導体を用いた癌転移抑制用組成物 Download PDFInfo
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- JP2006151902A JP2006151902A JP2004347054A JP2004347054A JP2006151902A JP 2006151902 A JP2006151902 A JP 2006151902A JP 2004347054 A JP2004347054 A JP 2004347054A JP 2004347054 A JP2004347054 A JP 2004347054A JP 2006151902 A JP2006151902 A JP 2006151902A
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- triterpene derivative
- cancer
- cancer metastasis
- metastasis
- suppressing
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Abstract
Description
"α-Melanocyte-stimulating hormone blocks invasion of reconstituted basement membrane (Matrigel) by murine B16 melanoma cells"; Jun Murata, Koichi Ayukawa, Masaru Ogasawara, Hideaki Fujii, Ikuo Saiki; Invasion Metastasis (1997), 17, pp.82-93.
本発明のトリテルペン誘導体は、いわゆる健康機能食品への用途としても有用であり、例えば、菓子、清涼飲料等の飲料、野菜又は果実加工品、畜肉製品、調味料等として広く適用可能である。その形態としては、特に限定されるものではなく、例えば粉末、固形、溶液等であり得る。上述したような食品類に本発明のトリテルペン誘導体を配合する場合には、本発明のトリテルペン誘導体を精製された化学物質として配合する場合のほか、本発明のトリテルペン誘導体を含有するキク科等の植物やその加工品として、あるいは適当な溶媒によるそれらの抽出物、また更にその抽出物を適当な方法により分画したものとして配合することができる。かかる健康機能食品中への本発明のトリテルペン誘導体の配合量としては、目的や製品形態等に応じて適宜設定することができる。一般的には、ドリンク剤等の溶液又は懸濁液等の場合、例えば、30ml中、活性成分として0.001〜100mgであり、好ましくは0.01〜10mg、より好ましくは0.1〜5mgである。また、タブレット等粉末固形製品の場合は、例えば、300mg中、活性成分として0.001〜50mgであり、好ましくは0.01〜10mg、より好ましくは0.1〜2mgである。
本発明に係るトリテルペン誘導体1乃至3の調製例を以下に示す。
本発明に係るトリテルペン誘導体1(ルペオール;式(I)中、Rが水酸基の化合物)を、以下に示す手段により抽出、単離した。
タンポポ根生薬(蒲公英根、ウチダ和漢薬)350gを破砕した後、エタノール5Lを用いて抽出を行い、これを濾過した。この抽出操作を更に4回繰り返した後、得られた濾液を減圧乾固し、粗抽出物(24.6g)を得た。
本発明に係るトリテルペン誘導体2(ルペニルパルミテート;式(I)中、Rが−O−CO−(CH2)14CH3(R´が炭素数15のアルキル基)であるパルミチン酸エステル)を、以下に示す手段により合成、精製した。
本発明に係るトリテルペン誘導体3(ルペオン;式(II)で表される化合物)を、以下に示す手段により合成、精製した。
無水ジクロロメタン(2mL)にルペオール(100mg)を溶解させた溶液に、クロロクロム酸ピリジニウム(50mg)を添加し、室温で2時間攪拌した。反応産物をジエチルエーテル(5mL)に溶解し、フロリジルカラムに通過させ、10倍容量のジエチルエーテルで溶出した。得られた溶出液から減圧濃縮により溶媒を除去し、ルペオン(無色針状結晶物質、60mg)を得た。試薬としてのルペオンと、混融試験ならびにIR及び1H-NMR、13C-NMRスペクトルを直接比較し、その化学構造を確認した。
B16 2F2を、10%牛胎児血清を添加したダルベッコ変法イーグル培地で培養した。ボイデンチャンバーは、24ウェル培養プレートに上室として8μmポアサイズのポリカーボネートフィルター付きのインサートを用いた型を使用した(コーニング社製;商品名 COSTARTRANSWELL)。B16 2F2細胞を0.1%牛血清アルブミン添加ダルベッコ変法イーグル培地で1×106cells/mLに調製し、前記調製例1で製造したルペオールを最終濃度1〜20μMとなるように添加し、5×105cells/ mLの細胞懸濁液を準備した。また、チャンバーの下室ウェルには予め上室と同濃度のルペオールを含む0.1%牛血清アルブミン添加ダルベッコ変法イーグル培地600μLを入れた後、上室をセットした。上室にB16 2F2細胞5×105cells/ mLを100μL入れ、37℃、5%CO2雰囲気下に6時間インキュベートした。その後、フィルターを取り出し、フィルター下面に遊走したB16 2F2細胞を固定後、ヘマトキシリン染色液にて染色し、顕微鏡下で遊走細胞数を算定した。
実施例1に対し、本発明のトリテルペン誘導体として、ルペオールに替えて前記調製例に従い製造したルペオン、ルペニルアセテートを使用した以外は実施例1と同様にして実験を行った。その結果、ルペオン、ルペニルアセテート10μMの濃度におけるMigration Indexは、各々29.2%、39.7%であり、この場合も優れたB16 2F2細胞遊走阻害能を有することが明らかとなった。
10μMルペオールを用い、ヒト由来メラノーマ、神経芽細胞腫、神経膠芽腫、アストロサイトーマ、肺腺癌、腎腺癌、繊維肉腫、骨肉腫、胃癌由来、子宮頸癌、膵臓癌、膀胱癌の遊走能に対する阻害能を、実施例1と同様に評価した。データは、4穴の平均値により示した。その結果、前記癌細胞の中で、メラノーマ(Migration Index = 40.8%)、神経芽細胞腫(Migration Index = 39.7%)、神経膠芽腫(Migration Index = 39.8%)、及びアストロサイトーマ(Migration Index = 43.3%)に対して特に優れた遊走阻害能を発現することが明らかとなった。
B16 2F2細胞を、10%牛胎児血清添加ダルベッコ変法イーグル培地で1×106cells/mL(1mL)に調製し、ルペオールを最終濃度10μMとなるように添加した。37℃、5%CO2雰囲気下に12時間インキュベートした。B16 2F2細胞を固定後、Alexa-Fluora 488-Phalloidin溶液にて染色し、蛍光顕微鏡下で細胞内アクチンポリマー(=ストレスファイバー)を観察した。図2に結果を示す。
本発明に係る注射剤用癌転移抑制剤は、例えば、以下の手段により調製することができる。
本発明のトリテルペン誘導体 10 mg
ポリオキシエチレン水素化ひまし油60 400 mg
エタノール 1mLとするのに必要な量
常法により本発明のトリテルペン誘導体及びポリオキシエチレン水素化ひまし油60をエタノールに溶解させ、上記成分組成からなる溶液を調整する。得られる溶液は、適量の生理食塩水で希釈して、静脈内注入により投与することができる。
本発明に係る健康機能食品(タブレット)は、例えば、以下の成分組成において製造することができる。
還元麦芽糖 87.8 mg
トレハロース 41.2 mg
乳糖 16.5 mg
ショ糖脂肪酸エステル 6.2 mg
デキストリン 147.8 mg
Claims (6)
- 前記癌転移抑制用トリテルペン誘導体が、癌細胞の運動能抑制機能を有することを特徴とする、請求項1に記載の癌転移抑制用トリテルペン誘導体、またはその薬学的に許容される塩。
- 前記癌細胞の運動能抑制機能が、癌細胞内におけるアクチンポリマーの脱重合を促進することにより癌細胞の運動能を抑制するものである、請求項2に記載の癌転移抑制用トリテルペン誘導体、またはその薬学的に許容される塩。
- 前記癌細胞が、悪性黒色腫、神経芽細胞腫、神経膠芽腫およびアストロサイトーマから選択される少なくとも1つである、請求項2または3に記載の癌転移抑制用トリテルペン誘導体、またはその薬学的に許容される塩。
- 請求項1乃至3のいずれかに記載の癌転移抑制用トリテルペン誘導体またはその薬学的に許容される塩を有効成分として含有する癌転移抑制剤。
- 請求項1乃至3のいずれかに記載の癌転移抑制用トリテルペン誘導体またはその薬学的に許容される塩を有効成分として含有する健康機能食品。
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