JP2021508737A - 細胞標的複合体の調製のための遷移金属ベースの官能性部分 - Google Patents
細胞標的複合体の調製のための遷移金属ベースの官能性部分 Download PDFInfo
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- JP2021508737A JP2021508737A JP2020555005A JP2020555005A JP2021508737A JP 2021508737 A JP2021508737 A JP 2021508737A JP 2020555005 A JP2020555005 A JP 2020555005A JP 2020555005 A JP2020555005 A JP 2020555005A JP 2021508737 A JP2021508737 A JP 2021508737A
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- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- A61K47/6803—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates
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Abstract
Description
ここで、Mは遷移金属錯体、好ましくは白金(II)錯体であり、配位子L1又はL2の1つはヨウ化物、臭化物又は塩化物から選択され、他の配位子は一次官能性部分である。Nuは求核基であり、ここでNu1及びNu2は同じ基又は異なる基であり得、これらは一緒に二座配位子を形成するが、但し、前記二座配位子はエタン‐1,2‐ジアミンではない。
本明細書で使用される「細胞標的複合体」という用語は、その従来の意味を有し、治療用化合物、診断用化合物、キレート剤、色素などの一次官能性部分、又は抗体のような細胞結合部分にリンカーを介して結合された任意のモデル化合物を指す。抗体を含む細胞標的複合体は、抗体‐薬物複合体とも呼ばれる。しかし、本発明の範囲内では、抗体以外の他のタイプの細胞結合部分を使用できることに留意されたい。
ここで、Mは金属イオン又は原子を表し、好ましくはPt(II)であり、Nuは求核基であり、Nu1及びNu2は構造的に同じ基又は異なる基であることができ、Nu1とNu2の間の点線と共に二座配位子を表す。
本発明の第1の態様は、以下の式Iによる二次官能性部分に関する。
ここで、Mは遷移金属錯体であり、配位子L1又はL2の1つはヨウ化物、臭化物又は塩化物から選択され、他の配位子は一次官能性部分である。Nuは求核基であり、ここでNu1及びNu2は同じ基又は異なる基であり得、これらは一緒に二座配位子を形成するが、但し、前記二座配位子はエタン‐1,2‐ジアミンではない。
あるいは、複数の種類の官能性部分を使用することができる。このようにして、異なる官能性部分、例えば、治療用化合物の異なる有用な組み合わせ、又は有用な診断用化合物の異なる組み合わせ、又は両方の異なる組み合わせを、1つの標的部分に対して結合することが可能である。これを行うことにより、治療用化合物の好ましい組み合わせを目的の組織に送達することができる。
化合物1aはSigma‐Aldrich、製品コード404322、[52691‐24‐4]から購入した。
2.1.PtBr2(エタン‐1,2‐ジアミン)(2a)の合成と分析的特性評価
KBr(2.38g、20mmol)を水(25mL)中のK2PtCl4(415mg、1.0mmol)の溶液に加えた。混合物を室温で24時間撹拌し、次に得られた褐色の混合物を濾過し、エタン‐1,2‐ジアミン(81μL、1.2mmol)を濾液に加え、混合物を室温で18時間撹拌した。沈殿物を濾過により収集し、水で完全に洗浄し、最初に吸引下でフィルター上で1時間乾燥させた。次に、フィルターケーキ(黄色の固体335mg)をフラスコに移し、MeOH(5mL)で1時間スラリー洗浄し、ろ過して集め、フィルターケーキをMeOHで洗浄し、次いで12時間減圧下で乾燥させ、黄色の固体(298mg、72%収率)を取得した。
KI(33.2g、0.2mol)を、水(200mL)中のK2PtCl4(4.15g、10mmol)の溶液に加えた。混合物を室温で22時間撹拌した後、得られた暗色の混合物を濾過し、エタン‐1,2‐ジアミン(800μL、12mmol)を濾液に加え、混合物を室温で23時間撹拌した。エタン‐1,2‐ジアミンを加えるとすぐに黄色の沈殿物が形成し始めた。沈殿物を濾過により収集し、水で十分に洗浄し、最初にフィルター上で吸引して3〜4時間、次に減圧下で12時間乾燥させて、黄色の固形物(4.85g、収率95%)を得た。
単離及び初期乾燥工程の後、材料をさらにMeOHでスラリー洗浄し、濾過し、MeOHで洗浄し、乾燥させた。
単離及び初期乾燥工程の後、材料をさらにMeOHでスラリー洗浄し、濾過し、MeOHで洗浄し、乾燥させた。
単離及び初期乾燥工程の後、材料をさらにMeOHでスラリー洗浄し、濾過し、MeOHで洗浄し、乾燥させた。
Berger et al., ChemMedChem 2007, 2, 505-514に従って調製。
Verel et al., J. Nucl. Med. 2003, 44, 1271-1281に従って調製。
HPLC(Grace Alltima C18 5μmカラム、25x4.6mm)は、生成物が97.2%の純度(保持時間14.2分;勾配:5〜50%MeCN/0.1%TFA水溶液/0.1%TFA、18分、波長430nmで測定)であることを示した。
Gieβler et al., Eur. J. Org. Chem 2010, 3611-3620に従って調製。
Gieβler et al., Eur. J. Org. Chem 2010, 3611-3620に従って調製。
HPLC(Grace Alltima C18 5μmカラム、25x4.6mm)は、生成物が98.5%の純度であることを示した(保持時間14.9分、勾配:5〜50%MeCN/0.1%TFA水溶液/0.1%TFA、18分、波長273nmで測定)。
手順はVugts et al., Bioconjugate Chem. 2011, 22, 2072-2081から採用した。
手順はVugts et al., Bioconjugate Chem. 2011, 22, 2072-2081から採用した。
HPLC(Grace Alltima C18 5μmカラム、25x4.6mm)は、バッチ1が94.8%の純度、バッチ2が95.2%の純度(保持時間20.4分、勾配:5〜50%MeCN/0.1%TFA水溶液/0.1%TFA、20分、430nmの波長で測定)であることを示した。収率は約80%であると想定された(Vugts et al., Bioconjugate Chem. 2011, 22, 2072-2081によって得られた結果に基づく)。生成物を含む2つの溶液を、さらに後処理又は精製せずに次のステップで使用した。
反応混合物を水/MeOH(4:1、2.5mL)で希釈し、0.2μmシリンジフィルターでろ過した。精製は、分取逆相HPLC(Grace Alltima C18 5μmカラム、22x250mm、勾配:20〜100%MeOH/0.1%TFA水溶液/0.1%TFA、36分)により行った。生成物画分を凍結乾燥すると、無色の固体(25.2mg、65.1%収率)が得られた。
反応混合物を水/MeOH(2:1、2.5mL)で希釈し、0.2μmシリンジフィルターでろ過した。精製は、分取逆相HPLC(Grace Alltima C18 5μmカラム、22x250mm、勾配:35〜100%MeOH/0.1%TFA水溶液/0.1%TFA、36分)で行った。生成物画分を減圧下で濃縮して、無色の油を得た(18.0mg、75.0%収率)。
結合混合物にNaIがない場合
結合混合物にNaIを使用
10.1 バイオ複合体トラスツズマブ‐[Pt((Fluor545−PEG4‐DBCO‐トリアゾール‐PEG4)2‐ベンゼン‐ピリジン)]n(10a)の合成
Claims (19)
- 以下の式Iによる二次官能性部分
ここで、Mは遷移金属錯体であり、配位子L1又はL2の1つはヨウ化物、臭化物又は塩化物から選択され、他の配位子は一次官能性部分である。Nuは求核基であり、ここでNu1及びNu2は同じ基又は異なる基であり得、これらは一緒に二座配位子を形成するが、但し前記二座配位子はエタン‐1,2‐ジアミンではない。 - Nu1及びNu2によって形成される二座配位子が、以下の式の1つによって表される、請求項1に記載の二次官能性部分。
- Nu1及びNu2によって形成される二座配位子が、以下の式の1つによって表される、請求項1〜2のいずれかに記載の二次官能性部分。
- Nu1及びNu2によって形成される二座配位子が、以下の式の1つによって表される、請求項1〜3のいずれかに記載の二次官能性部分。
- 遷移金属錯体Mが白金(II)錯体である、請求項1〜4のいずれかに記載の二次官能性部分。
- 一次官能性部分が、治療用化合物、診断用化合物、キレート剤、色素又はモデル化合物からなる群から選択され、好ましくは一次官能性部分は細胞毒性化合物である、請求項1〜5のいずれかに記載の二次官能性部分。
- 細胞毒性化合物が、アウリスタチン、ドラスタチン、シンプロスタチン、メイタンシノイド、チューブリシン、HTI‐286、カリケアマイシン、デュオカルマイシン、ピロロベンゾジアゼピン(PBD)、インドリノベンゾジアゼピン(IGN)、カンプトテイン、アントラサイクリン、アゾナフィド、アマニチン、クリプトフィシン、リゾキシン、エポチロン、スプライセオスタチン、タイランスタチン、コルヒチン、アプリロニン、タキソイド、メトトレキサート、アミノプテリン、ビンカアルカロイド、シュードモナス外毒素Aのフラグメント、スタチン、リシンA、ゲロニン、サポリン、インターロイキン‐2、インターロイキン‐12などのタンパク質性毒素、E4、f4、アポプチン、又はNS1などのウイルス性タンパク質、HAMLET、TRAIL、又はmda‐7などの非ウイルス性タンパク質の群から選択される、請求項6に記載の方法。
- 診断用化合物が放射性核種、PET画像化可能薬剤、SPECT画像化可能薬剤又はMRI画像化可能薬剤、IRDye800CW、DY‐800、ALEXA FLUOR(登録商標)750、ALEXA FLUOR(登録商標)790、インドシアニングリーン、FITC、BODIPY FLなどのBODIPY、及びローダミンBなどのローダミンを含む、請求項6に記載の二次官能性部分。
- 遷移金属錯体が白金(II)錯体であり、一次官能性部分がアウリスタチン、好ましくはアウリスタチンFである、請求項1〜8のいずれかに記載の二次官能性部分。
- 式Iによる二次官能性部分のハロゲン化物配位子L1又はL2が細胞結合部分によって置換されている、請求項1〜9のいずれかに記載の反応した二次官能性部分を含む細胞標的複合体。
- 細胞結合部分が、抗体、一本鎖抗体、抗体フラグメント、モノクローナル抗体、操作されたモノクローナル抗体、標的細胞に特異的に結合する一本鎖モノクローナル抗体又はモノクローナル抗体又はそのフラグメント、キメラ抗体、キメラ抗体フラグメント、又はアフィボディ、アンチカリン、アドネクチン、ダーピン、Bicycle(登録商標)などの非伝統的なタンパク質スキャフォールド、又は標的細胞に特異的に結合する葉酸誘導体である、請求項10に記載の細胞標的複合体。
- 細胞結合部分が、トラスツズマブ、セツキシマブ、リツキシマブ、オファツムマブ、オビヌツズマブ、ブレンツキシマブ、抗EGFRvIII抗体、及び抗MAGE‐HLAペプチド複合抗体などの腫瘍細胞のような異常細胞の細胞内標的に対する抗体である、請求項10又は11に記載の細胞標的複合体。
- トラスツズマブ-Pt((1R,2R)‐シクロヘキサン‐1,2‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt((1S,2S)‐シクロヘキサン‐1,2‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt((1R,2S)‐シクロヘキサン‐1,2‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt(N1、N2‐ジメチルエタン‐1,2‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt(プロパン‐1,3‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt(1,3‐ジアミノプロパン‐2‐オール)-アウリスタチンF、トラスツズマブ-Pt((1R,2R)‐シクロブタン‐1、2‐ジイル)ジメタンアミン)-アウリスタチンF、トラスツズマブ-Pt((3R,4R,5S,6R)‐3,4‐ジアミノ‐6‐(ヒドロキシメチル)テトラヒドロ‐2H‐ピラン‐2,5‐ジオール)-アウリスタチンF、トラスツズマブ-Pt(((4aR,6R,7R,8R,8aS)‐6‐メトキシ‐2‐フェニルヘキサヒドロピラノ[3,2‐d][1,3]ジオキシン‐7,8‐ジアミン)-アウリスタチンF、トラスツズマブ-Pt(2‐((2‐アミノエチル)アミノ)エタン‐1‐オール)-アウリスタチンF、トラスツズマブ-Pt(2,2’‐(エタン‐1,2‐ジイルビス(アザンジイル))ビス(エタン‐1‐オール))-アウリスタチンFからなる群から選択される、請求項10〜12の細胞標的複合体。
- 抗EGFRvIII抗体‐Pt(1,3‐ジアミノプロパン‐2‐オール)‐PNU‐159682、抗MAGE‐HLAペプチド複合抗体‐Pt(1,3‐ジアミノプロパン‐2‐オール)-アルファ‐アマニチン、MAGE‐HLAペプチド複合抗体-Pt(1,3‐ジアミノプロパン‐2‐オール)-PBD、及びブレンツキシマブ-Pt(1,3‐ジアミノプロパン‐2‐オール)-アルファアマニチンを含む群から選択される、請求項10〜12の細胞標的複合体。
- 遷移金属錯体が白金(II)錯体であり、細胞結合部分がトラスツズマブであり、一次官能性部分がアウリスタチン、好ましくはアウリスタチンFである、請求項10〜12のいずれかに記載の細胞標的複合体。
- 哺乳動物、特にヒトにおける癌の治療に使用するための、請求項10〜15のいずれか一項に記載の細胞標的複合体。
- 結腸直腸癌、乳癌、膵臓癌、及び非小細胞肺癌の治療に使用するための、請求項16に記載の使用のための細胞標的複合体。
- 乳癌の治療において使用するための、請求項17に記載の使用のための細胞標的複合体であって、前記乳癌は、Her2の低い発現レベルを有する、上記細胞標的複合体。
- 請求項10〜15のいずれかに記載の細胞標的複合体及び薬学的に許容される担体を含む医薬組成物。
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