JP5130530B2 - 光増感用化合物 - Google Patents
光増感用化合物 Download PDFInfo
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- JP5130530B2 JP5130530B2 JP2007551086A JP2007551086A JP5130530B2 JP 5130530 B2 JP5130530 B2 JP 5130530B2 JP 2007551086 A JP2007551086 A JP 2007551086A JP 2007551086 A JP2007551086 A JP 2007551086A JP 5130530 B2 JP5130530 B2 JP 5130530B2
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- QFWPJPIVLCBXFJ-UHFFFAOYSA-N glymidine Chemical compound N1=CC(OCCOC)=CN=C1NS(=O)(=O)C1=CC=CC=C1 QFWPJPIVLCBXFJ-UHFFFAOYSA-N 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
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- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
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- CMFNMSMUKZHDEY-UHFFFAOYSA-N peroxynitrous acid Chemical compound OON=O CMFNMSMUKZHDEY-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
- C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
Landscapes
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Chemical & Material Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Saccharide Compounds (AREA)
- Pyrane Compounds (AREA)
Description
本明細書において、上記の式(I)中、R3、R4、R5、R6、R7、及びR8が示すハロゲン原子としては、フッ素原子、塩素原子、臭素原子、又はヨウ素原子のいずれでもよいが、臭素原子又はヨウ素原子であることが好ましく、R3、R4、R5、R6、R7、及びR8のうちの1個又は2個が臭素原子又はヨウ素原子であることがより好ましい。R5及びR6が共にヨウ素原子であるか、又はそれらのうちの一方がヨウ素原子であることが特に好ましい。
細胞生物学的研究においては公知の遺伝子導入方法を使用することができ、外界からの刺激への応答を光照射前後で比較することで、遺伝子導入された細胞の機能、役割を解析することができる。
例1:化合物4及び化合物5の合成
化合物4及び化合物5の合成スキームを以下に示した。
化合物1をJ. Am. Chem. Soc., 127, pp.4888-4894 (2005)に記載された方法で合成した。化合物1(30 mg, 86 μmol)、炭酸セシウム(140 mg, 429 μmol)と2,3,4,6-テトラ-O-アセチル-α-D-ガラクトピラノシルブロマイド (282 mg, 688 μmol)を無水ジメチルホルムアミド(3 mL)中アルゴン雰囲気下室温で4時間撹拌した。反応溶液を酢酸エチルで希釈し、水と飽和食塩水で洗浄した。有機層を硫酸ナトリウムで乾燥し、ろ過後減圧留去した。残渣をシリカゲルクロマトグラフィーで精製し、化合物2を得た(51 mg, 75 μmol, 収率88%)。
1H-NMR (CDCl3, 300 MHz):δ 2.03 (s, 3H), 2.08 (s, 3H), 2.14 (s, 3H), 2.20 (s, 3H), 3.72 (s, 3H), 3.92 (s, 3H), 4.14-4.26 (m, 3H), 5.12-5.19 (m, 2H), 5.48-5.57 (m, 2H), 6.40 (d, J=1.8Hz, 1H), 6.58 (dd, J=9.8 Hz, 1.8 Hz, 1H), 6.64-6.70 (m, 2H), 6.82 (dd, J=8.8 Hz, 2.0 Hz, 1H), 7.06-7.09 (m, 2H), 7.11 (d, J=9.8 Hz, 1H), 7.14 (d, J=8.8 Hz, 1H).
HRMS (ESI+): calcd. for [M+H]+, 679.2027, Found, 679.2015.
少量の水に溶かしたヨウ素酸(18 mg, 104 μmol)を化合物2(47 mg, 63 μmol)とヨウ素(15 mg, 119 μmol)のエタノール(4 mL)溶液中に20分かけて滴下し、室温で15分撹拌した。反応溶液を酢酸エチルで希釈し、水と飽和食塩水で洗浄した。有機層を硫酸ナトリウムで乾燥し、ろ過後減圧留去した。残渣をシリカゲルカラムクロマトグラフィーで精製し、化合物3を得た(40 mg, 50 μmol, 収率 72%)。
1H-NMR (CDCl3, 300 MHz): δ 2.03 (s, 3H), 2.08 (s, 3H), 2.13 (s, 3H), 2.20 (s, 3H), 3.69 (s, 3H), 3.92 (s, 3H), 4.16-4.30 (m, 3H), 5.15-5.24 (m, 2H), 5.25-5.33 (m, 2H), 6.62-6.74 (m, 3H), 6.89 (dd, 1H, J=9.0 Hz, 2.4 Hz), 7.05-7.14 (m, 2H), 7.17-7.24 (m, 2H).
MS (ESI+) 805 [M+H]+.
化合物3(36 mg, 45 μmol)の2 mLメタノール溶液にナトリウムメトキシド (11 mg, 196 μmol)を加えた。0 ℃で1時間撹拌後、反応液をアンバーライトIR-120 plus (H+)で中和した。アンバーライトをろ過し、ろ液を減圧留去した。残渣を逆相プレパラティブTLC(RP18W)で精製し、化合物4を得た(22 mg, 45 μmol, 定量的)
1H-NMR (CD3OD, 300 MHz): δ 3.54 (1H, dd), 3.62 (s, 3H), 3.65-3.86 (m, 5H), 3.82 (s, 3H), 5.04 (d, 1H, J=7.7 Hz), 6.56 (d, 1H, J=9.7 Hz), 6.65-6.73 (m, 2H), 7.04 (dd, 1H, J=9.0Hz, 2.4 Hz), 7.09 (d, 1H, J=8.7 Hz), 7.14 Hz (d, 1H, J=9.7 Hz), 7.22 (d, 1H, J=9.0 Hz), 7.33 (d, 1H, J=2.4 Hz).
13C-NMR (CD3OD, 75 MHz): δ 30.76, 56.22, 62.39, 70.15, 72.04, 74.72, 77.41, 80.70, 99.95, 102.40, 104.77, 106.59, 114.31, 116.69, 117.36, 120.29, 126.99, 131.69, 132.75, 133.24, 152.48, 156.03, 159.53, 160.87, 164.44, 164.53, 182.84.
HRMS (ESI+): calcd. for [M+H]+, 637.0571, Found, 637.0550.
化合物4 (7 mg, 11 μmol)を無水ジメチルスルホキシド(100 μL)に溶解し、これを100 mmol/Lナトリウムリン酸緩衝液(pH7.4)を用いて最終的に3 mmol/L塩化マグネシウム、2000U β‐ガラクトシダーゼを含む溶液11 mLとして反応液を調整した。 この反応液を37 ℃で30分撹拌した。反応液をジクロロメタンで抽出して有機層を硫酸ナトリウムで乾燥し、ろ過後減圧留去した。残渣をシリカゲルクロマトグラフィーで精製し、化合物5 (4.1 mg, 8.4 μmol, 収率 77%)を得た。
1H-NMR (CD3OD, 300 MHz): δ 3.74 (s, 3H), 3.94 (s, 3H), 6.65 (d, 1H, J=9.7 Hz), 6.76-6.83 (m, 2H,), 6.86 (dd, 1H, J=9.0 Hz, 2.0 Hz), 7.02 (d, 1H, J=2.0 Hz), 7.18 (d, 1H, J=8.8 Hz), 7.23 (d, 1H, J=9.7 Hz), 7.26 (d, 1H, J=9.0Hz).
13C-NMR (CD3OD, 75 MHz): δ 56.14, 56.21, 79.79, 99.91, 103.44, 106.48, 114.63, 115.46, 118.10, 118.32, 125.17, 132.28, 132.64, 132.94, 153.63, 157.54, 159.48, 160.36, 164.38, 169.25, 181.50.
HRMS (ESI+): calcd. for [M+H]+, 475.0042, Found. 475.0090.
化合物4及び化合物5の吸収及び蛍光スペクトル(励起波長490 nm)を測定した。測定は1 μmol/Lとなるように化合物4及び化合物5の0.1 mmol/L ナトリウムリン酸緩衝液(0.1%のジメチルホルムアミドを共溶媒として含む)を調製して行った。蛍光量子収率は0.1 mmol/L水酸化ナトリウム水溶液中でのフルオレセインを0.85として算出した。結果を図1及び表1に示す。
化合物4及び化合物4とβ-ガラクトシダーゼとの反応によって生成する化合物5に光照射し、生成する1O2をヨウ化物イオン(I-)の酸化反応を追跡することにより測定した。リン酸緩衝液中で1O2によるI-の酸化は図2に示したように進行し、生成する三ヨウ化物イオン(I3 -)は351 nmに吸収を有するので、反応に伴う351 nmにおける吸光度の上昇を測定することにより化合物4及び化合物5の1O2生成能を測定することができる。
β-ガラクトシダーゼ依存的に1O2生成能が約20倍上昇する化合物4を(lacZ(+))細胞及び(lacZ(-))細胞に適用し、β-ガラクトシダーゼの発現の有無によって光照射に伴う酸化ストレス負荷(細胞死)に変化が認められるか否かを検討した。
試験は被検細胞としてlacZを発現したHEK293細胞(lacZ(+))と発現していないHEK293細胞((lacZ(-))を用い、それぞれ以下の方法で行った。なお、HEK293細胞(lacZ(+))とHEK293細胞((lacZ(-))はガラスボトムディシュ(無処理)に接着してDMEM(Dulbecco's modified Eagle medium)培地中で培養し、細胞密度が2〜5×105 cell/mLとなったものを用いた。
(2)化合物4の25 μmol/L 2CaRinger液1 mL加えた。
(3)2 時間室温でインキュベートした。
(4)2CaRinger 1 mLで2回洗浄し、直ちに微分干渉コントラスト(DIC)像・蛍光像(NIBAフィルターを使用)を撮影した。
(5)490 nmの光(6.8 mW/cm2)を細胞の一部に1分間照射し、直ちにDIC像・蛍光像(NIBAフィルターを使用)を撮影した。
(6)細胞外液をDMEM培地 2 mLに換えてCO2 インキュベーターに入れ、4 時間インキュベートした。4 時間後、2CaRinger 1 mLで2回洗浄した。
(7)細胞外液を2 μmol/L, Calcein/AM、4 μmol/L エチジウムホモダイマー-1 (EthD-1)の 2CaRinger液1 mLに換え、30 分間室温でインキュベート後、2CaRinger 1 mLで2回洗浄した。
(8)生死判別試験をCalcein イメージング(生細胞)及びEthD-1イメージング(死細胞)の二色蛍光イメージングによって行った。Calcein イメージングにはBP470-490励起フィルターとBA510-550蛍光フィルターを、EthD-1イメージングにはBP530-550励起フィルターとBA590蛍光フィルターを使用した。
以上の結果より、化合物4を用いることで、光照射によってlacZ(+)の細胞だけに選択的に酸化ストレスをかけ、細胞死へと誘導できることが示された。
Claims (9)
- 下記の式(I):
- 上記の切断が酵素による加水分解により生じる請求の範囲第1項に記載の光増感用化合物。
- R9がリン酸エステル加水分解酵素により切断されるホスホノ基である請求の範囲第2項に記載の光増感用化合物。
- R9がβ-ガラクトシダーゼにより切断されるβ-ガラクトピラノシル基である請求の範囲第3項に記載の光増感用化合物。
- フォトダイナミックセラピー用の医薬であって、請求の範囲第1項ないし第4項のいずれか1項に記載の光増感用化合物を有効成分として含む医薬。
- 悪性腫瘍治療のための請求項5に記載の医薬。
- 下記の式(II):
- 細胞を殺傷するために用いる医薬であって、請求の範囲第1項ないし第4項のいずれか1項に記載の式(I)で表される光増感用化合物を細胞内に導入し、該細胞において特異的に発現する酵素又は活性酸素種と上記式(I)で表される光増感用化合物とを接触させて請求の範囲第7項に記載の上記式(II)で表される対応の化合物を生成させ、その後、励起光照射を行って上記式(II)で表される化合物により活性酸素種を発生させて該細胞を選択的に殺傷する医薬。
- 悪性腫瘍の治療のために用いる医薬であって、ヒトを含む哺乳類動物に請求の範囲第1項ないし第4項のいずれか1項に記載の式(I)で表される光増感用化合物を投与して悪性腫瘍細胞内に該光増感用化合物を取り込ませ、該細胞において特異的に発現する酵素又は活性酸素種と上記式(I)で表される光増感用化合物とを接触させて請求の範囲第7項に記載の式(II)で表される化合物を生成させ、その後、励起光照射を行って上記式(II)で表される化合物により活性酸素種を発生させて該悪性腫瘍細胞を殺傷する医薬。
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