JP6061373B2 - 2−ヒドロキシベンズアルデヒド化合物、これを含有するコラーゲン細胞外分泌阻害剤及び医薬品組成物 - Google Patents
2−ヒドロキシベンズアルデヒド化合物、これを含有するコラーゲン細胞外分泌阻害剤及び医薬品組成物 Download PDFInfo
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- JP6061373B2 JP6061373B2 JP2012163835A JP2012163835A JP6061373B2 JP 6061373 B2 JP6061373 B2 JP 6061373B2 JP 2012163835 A JP2012163835 A JP 2012163835A JP 2012163835 A JP2012163835 A JP 2012163835A JP 6061373 B2 JP6061373 B2 JP 6061373B2
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- BPHPUYQFMNQIOC-NXRLNHOXSA-N isopropyl beta-D-thiogalactopyranoside Chemical compound CC(C)S[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O BPHPUYQFMNQIOC-NXRLNHOXSA-N 0.000 description 1
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- HZZOEADXZLYIHG-UHFFFAOYSA-N magnesiomagnesium Chemical compound [Mg][Mg] HZZOEADXZLYIHG-UHFFFAOYSA-N 0.000 description 1
- 229940037627 magnesium lauryl sulfate Drugs 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- HBNDBUATLJAUQM-UHFFFAOYSA-L magnesium;dodecyl sulfate Chemical compound [Mg+2].CCCCCCCCCCCCOS([O-])(=O)=O.CCCCCCCCCCCCOS([O-])(=O)=O HBNDBUATLJAUQM-UHFFFAOYSA-L 0.000 description 1
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- 230000000717 retained effect Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 125000005624 silicic acid group Chemical class 0.000 description 1
- NGHMEZWZOZEZOH-UHFFFAOYSA-N silicic acid;hydrate Chemical compound O.O[Si](O)(O)O NGHMEZWZOZEZOH-UHFFFAOYSA-N 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 229910001467 sodium calcium phosphate Inorganic materials 0.000 description 1
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- 229910052623 talc Inorganic materials 0.000 description 1
- WROMPOXWARCANT-UHFFFAOYSA-N tfa trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F.OC(=O)C(F)(F)F WROMPOXWARCANT-UHFFFAOYSA-N 0.000 description 1
- 229940126585 therapeutic drug Drugs 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
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Landscapes
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
(式(I)中、R1は、水素原子、ハロゲン原子又はニトロ基を示す。
R2は、ハロゲン原子、フェニル基又はベンジル基を示す。当該フェニル基又は当該ベンジル基の芳香環は、ハロゲン原子により置換されていてもよい。)
さらに、R1がニトロ基又は臭素原子であり、R2が無置換のベンジル基である2−ヒドロキシベンズアルデヒド化合物が活性上特に好ましい。
本発明者らは、化合物ライブラリーを用いてHsp47とコラーゲンとの相互作用を阻害する活性を有する物質の探索を行った。その結果、下記一般式(I)で示される2−ヒドロキシベンズアルデヒド化合物(以下「化合物(I)」と称する)が、結合阻害活性を有することを見出した。化合物(I)は、P4Hとコラーゲンとの結合阻害活性も有し、Hsp47及びP4Hによるコラーゲンの細胞外分泌機能を阻害して、コラーゲンの細胞外分泌を抑制する作用を示した。
本発明に係るコラーゲン細胞外分泌抑制剤は、上記2−ヒドロキシベンズアルデヒド化合物を有効成分とし、Hsp47及び/又はP4Hとコラーゲン分子との相互作用を阻害する活性を有し、コラーゲンの細胞外分泌を抑制する作用を示す。コラーゲンの細胞外分泌を抑制できれば、細胞外マトリクスの組織中への過度な集積とこれに伴う組織機能の低下を防止又は軽減することが可能と考えられる。従って、このコラーゲン細胞外分泌抑制剤は、種々の線維症を治療又は予防するための医薬品組成物として利用され得る。
崩壊剤としては、例えば、上記賦形剤の他、クロスカルメロースナトリウム、カルボキシメチルスターチナトリウム、架橋ポリビニルピロリドン等の化学修飾されたデンプン又はセルロース誘導体等が挙げられる。
滑沢剤としては、例えば、タルク;ステアリン酸;ステアリン酸カルシウム、ステアリン酸マグネシウム等のステアリン酸金属塩;コロイドシリカ;ビーガム、ゲイロウ等のワックス類;ホウ酸;グリコール;フマル酸、アジピン酸等のカルボン酸類;安息香酸ナトリウム等のカルボン酸ナトリウム塩;硫酸ナトリウム等の硫酸塩;ロイシン;ラウリル硫酸ナトリウム、ラウリル硫酸マグネシウム等のラウリル硫酸塩;無水ケイ酸、ケイ酸水和物等のケイ酸類;デンプン誘導体等が挙げられる。
安定剤としては、例えば、メチルパラベン、プロピルパラベン等のパラオキシ安息香酸エステル類;クロロブタノール、ベンジルアルコール、フェニルエチルアルコール等のアルコール類;塩化ベンザルコニウム;無水酢酸;ソルビン酸等が挙げられる。
矯味矯臭剤としては、例えば、甘味料、酸味料、香料等が挙げられる。注射用溶剤としては、例えば、水、エタノール、グリセリン等が挙げられる。
1.Hsp47とコラーゲンとの結合阻害活性を有する物質のスクリーニング
天然由来化合物と合成化合物とを含む化合物ライブラリーを用いて、Hsp47とコラーゲンとの結合阻害活性を有する物質の探索を行った。化合物ライブラリーは、放線菌(Actinomycetes)由来化合物を33,440種、真菌(Fungi)由来化合物を8,240種、その他の天然物由来化合物を640種、合成化合物を10,240種含む。
大腸菌発現系を用いてリコンビナントHsp47(rHsp47)の発現と精製を行った。ベクター(pET21a, Invitrogen)にchick Hsp47をクローニングし、発現ベクター(pET21a-chick Hsp47)を作成した。発現ベクターを用いて大腸菌(BL21(DE3)株)を形質転換し、培養を行った。培養液にIPTGを添加し、Hsp47をヒスチジンタグ組換えタンパクとして発現させた。菌体を細胞溶解バッファー(20mM Tris-HCl pH7.5, 150mM NaCl, 50mM imidazole, 15% glycerol, 1%NP40)に懸濁し、リゾチームを加え、氷上で50分間撹拌した。懸濁液を超音波処理した後、遠心分離を行った。ヒスチジンタグ組換えタンパク用精製カラム、ゲル濾過カラム及び限外濾過ユニットを用い、定法に従って上清中からrHsp47を回収した。
ライブラリー化合物の存在下におけるrHsp47とコラーゲンとの相互作用をSPRバイオセンサー(BIAcore3000, BIACORE)を用いて測定した。コラーゲンをアミノカップリング法によりCM5センサーチップに固定した。rHsp47をランニングバッファー(0.01 M HEPES pH 7.4, 0.15 M NaCl, 0.005% (v/v) SurfactantP20)を用いて6.6 microg/mlに調製した。また、ランニングバッファーを用いてライブラリー化合物(被検化合物)を40, 13, 4.4 microMに調製した。測定は、流速10 microl/min、相互作用時間150秒、乖離時間15秒、温度25℃の条件で行った。
シリウスレッドを用いて細胞外のコラーゲン量の評価を行った。Hsp47遺伝子がヘテロなマウス繊維芽細胞(+/−)をプレートに播種した。DMSOに50microMで溶解した化合物A、化合物B、化合物Cを培地に添加し、72時間培養した。培地を除いた後、PBSで2回洗浄し、ブアン液(75%ピクリン酸、10%ホルマリン、5%酢酸)で固定した。蒸留水で2回洗浄し、シリウスレッド溶液(0.1% シリウスレッド、ピクリン酸溶液)を加え、室温で1時間染色した。0.01N HClを用いて非特異的に吸着した色素を除いた後、0.1N NaOHを加えて色素を溶解させ、吸光度(570nm)を測定した。
2.化合物Cの分解産物の活性評価
化合物Cの分解産物である化合物D及び化合物(I−1)について、rHsp47とコラーゲンとの結合阻害活性を評価した。評価は、SPRバイオセンサーを用いて実験例1と同様にして行った。化合物D及び化合物(I−1)の構造を下記に示す。
3.化合物(I−1)のHsp47及びP4Hに対する結合能の評価
化合物(I−1)のHsp47、P4H及びコラーゲンに対する結合能をSPRバイオセンサー(BIAcoreA100, BIACORE)を用いて評価した。rHsp47、P4H又はコラーゲンをCM5センサーチップに固定した。化合物(I−1)をランニングバッファー(0.01 M HEPES pH 7.4, 0.15 M NaCl, 0.005% (v/v) Tween20)を用いて8.5、55.6、166.7 microMに調製した。測定は、流速10 microl/min、相互作用時間180秒、乖離時間30秒、温度25℃の条件で行った。
4.化合物(I−1)のP4H酵素活性阻害作用の評価
(1)基質ペプチドの水酸化を指標とした評価
基質ペプチドの水酸化を指標として、化合物(I−1)のP4H酵素活性阻害作用を評価した。タンパク低吸着チューブに、酵素反応溶液(50mM Tris-HCl pH7.4, 150mM NaCl, 50microM FeSO4, 0.5mM a-ketoglutarate, 2mM ascorbic acid, 0.1mM DTT, BSA 2mg/mL, catalase 0.1mg/mL)を入れ、37℃でプレインキュベートした。酵素反応溶液に、50microMの基質ペプチド((GPP)10、ペプチド研究所)と精製P4H(100nM)及び被検化合物を200microM入れ、酵素反応を開始させた。
細胞内タンパクの水酸化を指標として、化合物(I−1)のP4H酵素活性阻害作用を評価した。実験例1と同様にパルスチェイス法を行って、細胞内タンパクの水酸化レベルを評価した。一定時間培養後の培地に、サンプルバッファー(0.125 M Tris-HCl pH 6.8, 4%SDS, 20% glycerol, 0.002% Bromophenol blue)と0.1M DTTを加えて5分間煮沸し、培地成分サンプルとした。培地回収後の細胞をPBSで洗浄後、タンパク質抽出バッファー(50mM Tris-HCl pH8.0, 0.15M NaCl, 5mM EDTA, 1% NP40)を加え、氷上で20分間静置した。その後、遠心分離を行って得た上清にサンプルバッファーと0.1M DTTを加えて5分間煮沸し、細胞成分サンプルとした。
5.化合物(I−1)のコラーゲン細胞外分泌抑制作用の評価
(1)パルスチェイス法による評価
チェイス時間20、60分における細胞成分サンプル及び培地成分サンプルについてSDS-PAGEを行い、FLA-7000(FujiFILM)を用いてプロコラーゲンα1に相応する分子量のバンドから35S標識タンパクの放射活性を検出し、解析を行った。結果を図9に示す。Aは細胞成分サンプル、Bは培地成分サンプルの結果を示す。
マウス繊維芽細胞をカバーガラス上で培養した。培地を回収した後、4% PFA溶液にて細胞を固定し、標本とした。1次抗体としてウサギポリクローナル抗I型コラーゲン抗体及びポリクローナル抗Laminin抗体、2次抗体としてAlexaFluor488結合型抗体ウサギIgG抗体を用い、定法に従って免疫染色を行った。核染色にはHoechst 33342を用いた。
6.類縁化合物の活性評価
化合物(I−1)と類似の構造を有する化合物について、rHsp47とコラーゲンとの結合阻害活性を、実験例1と同様にSPRバイオセンサーを用いて評価した。
Claims (7)
- 下記一般式(I)で示される2−ヒドロキシベンズアルデヒド化合物
(式(I)中、R1は、水素原子、ハロゲン原子又はニトロ基を示す。
R2は、ハロゲン原子、フェニル基又はベンジル基を示す。当該フェニル基又は当該ベンジル基の芳香環は、ハロゲン原子により置換されていてもよい。)
を有効成分とするコラーゲン細胞外分泌抑制剤。 - 前記式(I)中、R2が、フェニル基又はベンジル基である請求項1記載のコラーゲン細胞外分泌抑制剤。
- 前記式(I)中、R2が、ベンジル基であって塩素原子で置換されたものである、請求項1記載のコラーゲン細胞外分泌抑制剤。
- 前記式(I)中、R1がニトロ基又は臭素原子であり、R2が無置換のベンジル基である請求項1記載のコラーゲン細胞外分泌抑制剤。
- Hsp47及び/又はP4Hとコラーゲン分子との相互作用を阻害する活性を有する請求項1〜5のいずれか1項に記載のコラーゲン細胞外分泌抑制剤。
- 請求項1〜5のいずれかに記載のコラーゲン細胞外分泌抑制剤を含む、線維症用の医薬品組成物。
- 肺線維症、肝線維症、膵嚢胞線維症、心臓繊維症、骨髄繊維症、腎線維症、動脈硬化症、強皮症、ケロイドからなる群より選択される一以上の線維症の治療及び/又は予防に用いられる請求項6記載の医薬品組成物。
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