JP6672383B2 - 間葉及び上皮間葉形質転換循環腫瘍細胞のための特異的検出ツール - Google Patents
間葉及び上皮間葉形質転換循環腫瘍細胞のための特異的検出ツール Download PDFInfo
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Description
発明の背景
一態様では、本発明のモノクローナル抗体は、84−1のVHCDR1(配列番号3)と少なくとも80%同一の第1のVHCDR、84−1のVHCDR2(配列番号4)と少なくとも80%同一の第2のVHCDR、84−1のVHCDR3(配列番号5)と少なくとも80%同一の第3のVHCDR、84−1のVLCDR1(配列番号6)と少なくとも80%同一の第1のVLCDR、84−1のVLCDR2(配列番号7)と少なくとも80%同一の第2のVLCDR、及び84−1のVLCDR3(配列番号8)と少なくとも80%同一の第3のVLCDRを含み得る。
例えば、本発明は以下の項目を提供する。
(項目1)
単離されたモノクローナル抗体であって、前記抗体がビメンチンポリペプチドに特異的に結合し、前記抗体が前記ポリペプチドの結合に対して84−1モノクローナル抗体と競合する、前記抗体。
(項目2)
前記抗体が、
(a)84−1のV H CDR1(配列番号3)と少なくとも80%同一の第1のV H CDRと、
(b)84−1のV H CDR2(配列番号4)と少なくとも80%同一の第2のV H CDRと、
(c)84−1のV H CDR3(配列番号5)と少なくとも80%同一の第3のVHCDRと、
(d)84−1のV L CDR1(配列番号6)と少なくとも80%同一の第1のV L CDRと、
(e)84−1のV L CDR2(配列番号7)と少なくとも80%同一の第2のV L CDRと、
(f)84−1のV L CDR3(配列番号8)と少なくとも80%同一の第3のV L CDRと、を含む、項目1に記載の前記抗体
(項目3)
前記抗体が、
(a)配列番号3と同一である第1のV H CDRと、
(b)配列番号4と同一である第2のV H CDRと、
(c)配列番号5と同一である第3のV H CDRと、
(d)配列番号6と同一である第1のV L CDRと、
(e)配列番号7と同一である第2のV L CDRと、
(f)配列番号8と同一である第3のV L CDRと、を含む、項目2に記載の前記単離された抗体。
(項目4)
前記抗体が、84−1のV H ドメイン(配列番号1)と少なくとも約80%同一のV H ドメインと、84−1のV L ドメイン(配列番号2)と少なくとも約80%同一のV L ドメインと、を含む、項目2に記載の前記抗体。
(項目5)
前記抗体が、前記84−1のV H ドメイン(配列番号1)と同一のV H ドメインと、前記84−1のV L ドメイン(配列番号2)と同一のV L ドメインと、を含む、項目4に記載の前記抗体。
(項目6)
前記抗体が、前記84−1抗体である、項目1〜5のいずれか一項に記載の前記抗体。
(項目7)
前記抗体が組換え体である、項目1〜5のいずれか一項に記載の前記抗体。
(項目8)
前記抗体が、IgG、IgM、IgA、またはこれらの抗原結合断片である、項目1〜5のいずれか一項に記載の前記抗体。
(項目9)
前記抗体が、Fab’、F(ab’)2、F(ab’)3、一価scFv、二価scFV、または単一ドメイン抗体である、項目1〜5のいずれか一項に記載の前記抗体。
(項目10)
前記抗体が、ヒト、ヒト化抗体、または脱免疫化抗体である、項目1〜5のいずれか一項に記載の前記抗体。
(項目11)
前記抗体が、造影剤、化学療法剤、毒素、または放射性核種に抱合される、項目1〜5のいずれか一項に記載の前記抗体。
(項目12)
薬学的に許容し得る担体中に項目1〜5のいずれか一項に記載の抗体を含む、組成物。
(項目13)
項目1〜5のいずれか一項に記載の抗体をコードする核酸配列を含む、単離されたポリヌクレオチド分子。
(項目14)
前記84−1のV H ドメインのCDR1〜3(配列番号3、4、及び5)を含む抗体のV H ドメインを含む、組換えポリペプチド。
(項目15)
前記84−1のV L ドメインのCDR1〜3(配列番号6、7、及び8)を含む抗体のV L ドメインを含む、組換えポリペプチド。
(項目16)
項目14または15に記載のポリペプチドをコードする核酸配列を含む、単離されたポリヌクレオチド分子。
(項目17)
項目1〜5のいずれか一項に記載の抗体または項目14もしくは15に記載の組換えポリペプチドをコードする1つ以上のポリヌクレオチド分子を含む、宿主細胞。
(項目18)
前記宿主細胞が、哺乳動物細胞、酵母細胞、細菌細胞、繊毛虫類細胞、または昆虫細胞である、項目17に記載の前記宿主細胞。
(項目19)
抗体を製造する方法であって、
(a)項目1〜5のいずれか一項に記載の抗体のV L 及びV H 鎖をコードする1つ以上のポリヌクレオチド分子を、細胞中で発現させることと、
(b)前記抗体を前記細胞から精製することと、を含む、前記方法。
(項目20)
単離された抗体であって、前記抗体が、
(a)84−1のV H CDR1(配列番号3)と少なくとも80%同一の第1のV H CDRと、
(b)84−1のV H CDR2(配列番号4)と少なくとも80%同一の第2のV H CDRと、
(c)84−1のV H CDR3(配列番号5)と少なくとも80%同一の第3のV H CDRと、
(d)84−1のV L CDR1(配列番号6)と少なくとも80%同一の第1のV L CDRと、
(e)84−1のV L CDR2(配列番号7)と少なくとも80%同一の第2のV L CDRと、
(f)84−1のV L CDR3(配列番号8)と少なくとも80%同一の第3のV L CDRと、を含む、前記抗体。
(項目21)
循環腫瘍細胞を選択的に検出する方法であって、
(a)患者から血液サンプルを得ることと、
(b)前記サンプルを細胞表面ビメンチンに結合する抗体とインキュベートすることと、
(c)前記抗体結合細胞を検出し、これによって循環腫瘍細胞を選択的に検出することと、を含む、前記方法。
(項目22)
生循環腫瘍細胞を単離する方法としてさらに定義され、前記サンプルから(b)の前記抗体結合循環腫瘍細胞を分離することをさらに含む、項目21に記載の前記方法。
(項目23)
前記サンプルの、細胞表面ビメンチンに結合する抗体との前記インキュベートに先立って、CD45陽性細胞の前記サンプルを枯渇させることをさらに含む、項目21に記載の前記方法。
(項目24)
フローサイトメトリー、免疫組織化学法、蛍光顕微鏡法、ラジオイムノアッセイ、またはELISAを用いて、前記抗体結合細胞を検出することをさらに含む、項目21に記載の前記方法。
(項目25)
前記単離された生循環腫瘍細胞を遺伝子型特定することをさらに含む、項目22に記載の前記方法。
(項目26)
分離することが、免疫磁気捕捉、接着に基づく細胞選別法、磁気活性化細胞選別法、または蛍光活性化細胞選別法(FACS)を含む、項目22に記載の前記方法。
(項目27)
前記サンプルをタンパク質チロシンホスファターゼ阻害物質とインキュベートすることによって、細胞表面ビメンチンの発現のレベルを増加させることをさらに含む、項目21に記載の前記方法。
(項目28)
前記タンパク質チロシンホスファターゼ阻害物質が、オルトバナジウム酸ナトリウム、デホスタチン、mpV(pic)、フェニルアルシンオキシド、スチボグルコン酸ナトリウム、BAY U6751、チロシンホスファターゼ阻害物質カクテル(バナジウム酸ナトリウム、モリブデン酸ナトリウム、酒石酸ナトリウム、及びイミダゾールを含む)、ならびにRK−682である、項目27に記載の前記方法。
(項目29)
前記サンプルをEpCAMまたはサイトケラチン抗体とインキュベートすることをさらに含む、項目21に記載の前記方法。
(項目30)
前記患者における循環腫瘍細胞の数を定量化することをさらに含む、項目21に記載の前記方法。
(項目31)
癌患者において療法に対する応答をモニタリングする方法としてさらに定義され、循環腫瘍細胞の前記数が経時的に減少する場合、前記患者が療法に対して肯定的な応答を有したと言われる、項目30に記載の前記方法。
(項目32)
前記患者が、以前に癌と診断されておらず、前記方法が、早期癌検出の方法である、項目30に記載の前記方法。
(項目33)
前記患者が、寛解期にあり、前記方法が、再発の検出方法である、項目30に記載の前記方法。
(項目34)
1ミリリットルの血液当たり少なくとも約3個の循環腫瘍細胞を検出することが、前記患者が腫瘍を有する指標である、項目32及び33に記載の前記方法。
(項目35)
前記方法が、予後の方法であり、1ミリリットルの血液当たり少なくとも約5個の循環腫瘍細胞を検出することが、前記患者が予後不良を有する指標である、項目30に記載の前記方法。
(項目36)
前記患者が、上皮腫瘍を有する、項目21に記載の前記方法。
(項目37)
前記患者が、間葉腫瘍を有する、項目21に記載の前記方法。
(項目38)
項目21に記載の前記方法に従って循環腫瘍細胞を有することが判定された患者の治療方法であって、項目11に記載の抗体の有効量を投与することを含む、前記方法。
(項目39)
前記抗体が、薬学的に許容し得る組成物中に含まれる、項目38に記載の前記方法。
(項目40)
対象における癌の治療で使用するための、項目11に記載の抗体を含む組成物であって、前記対象が、循環腫瘍細胞を有すると判定されている、前記組成物。
(項目41)
前記癌が、乳癌、肺癌、頭頚部癌、前立腺癌、食道癌、気管癌、皮膚癌、脳癌、肝臓癌、膀胱癌、胃癌、膵臓癌、卵巣癌、子宮癌、子宮頸癌、精巣癌、結腸癌、直腸癌、及び皮膚癌である、項目40に記載の前記組成物。
(項目42)
前記対象が、上皮腫瘍を有する、項目40に記載の前記組成物。
(項目43)
前記対象が、間葉腫瘍を有する、項目40に記載の前記組成物。
(項目44)
前記対象が、転移性腫瘍を有する、項目40に記載の前記組成物。
(項目45)
化学療法剤、放射線療法剤、遺伝子療法剤、または第2選択免疫療法剤をさらに含む、項目40に記載の前記組成物。
(項目46)
対象における癌の前記治療のための医薬品の製造での項目11に記載の抗体の使用であって、前記対象が、循環腫瘍細胞を含むことが判定されている、前記使用。
I.本発明の抗体
II.循環腫瘍細胞
III.疾患の治療
A.薬学的調製物
B.併用治療
以下の実施例は、本発明の好ましい実施形態を裏付けるために含まれる。以下に続く実施例において開示された技術は、本発明の実行において良好に機能するように本発明者によって発見された技術を表し、したがって、その好適な実行のモードを構成すると考えられ得ることを、当業者に理解されるべきである。しかしながら、当業者は、本開示に照らして、本発明の趣旨及び範囲から逸脱することなく、多くの変更が開示される特定の実施形態においてなされるが、それでも同様なまたは類似する結果を得ることができることを理解するべきである。
実施例1−材料及び方法
Depletion Kitを製造業者の推奨に従って用いて、CD45陽性細胞を除去した。次に、CD45−ve細胞フラクションを、84−1陽性選択にかけた。簡単に言うと、細胞を84−1抗体で標識し、その後マウスIgG結合マイクロビーズを、この混合物に添加した。次いで、84−1+ve細胞を、Miltenyi Biotecからの磁性カラムを用いて抽出した。このように得られた細胞は、84−1陽性及びCD45陰性であり、さらなる分析に使える状態である。
Systems)を、3つの異なるレーンに充填し(1、10、及び1000ng)、SDSゲルを用いて分離し、二フッ化ポリピロリデン膜上に移した。rhVimの検出を、84−1抗体(1:1000)を用いる膜のインキュベーションによって行った。二次ヤギ抗マウスIgG:HRP(ホースラディッシュペルオキシダーゼ)(Promega)を用いて84−1抗体を検出した。免疫沈降法については、LM7細胞を、免疫沈降緩衝液(Thermo Scientific)を用いて溶解させ、84−1及び12−1抗体を用いてビメンチンを免疫沈降させた。マウスIgGを、対照抗体として用いた。免疫沈降物を、ウサギモノクローナル抗ビメンチン抗体(Cell Signaling)を用いてブロットした。
実施例2−細胞表面ビメンチン、新規ユニバーサル循環腫瘍細胞マーカー
et al.,2001)、単離されたCTCの核中のβ−カテニンの存在を検出した(図3D)。核中のC−Myc蓄積は、β−カテニンの核進入についての証拠を提供する(図3D)。全体として、これらの結果は、84−1抗体を使用しての、現行のCTC検出技術において主要な欠陥を引き起こす上皮癌細胞からのEMT CTCの単離を確証している。
実施例3:ビメンチンに対するマウスモノクローナル抗体12−1及び84−1のエピトープマッピング
Systemを用いて、7のスキャン強度値で読み取った。特に抗体84−1による、高強度で複雑な染色パターンのために、アッセイを抗体の0.2μg/mlの低濃度において繰り返して行った。染色パターンの全般的な強度は低下したが、バックグラウンドもスポットパターンの複雑性も減少しなかった。種々のペプチド長への明確な依存性を有する隣接するペプチドの連続した列によって形成されるエピトープ様スポットは、同定されなかった。その後、Flag及びHA制御ペプチドを、対応する対照抗体で染色した。
実施例4−癌患者からの血液中のCTCの検出
Claims (8)
- 固形腫瘍の生循環転移性腫瘍細胞を単離する方法であって、
(i)患者から以前に得られた生血液細胞またはその成分を、前記細胞の細胞表面ビメンチンに特異的に結合する抗体とインキュベートすることと、
(ii)前記抗体結合循環腫瘍細胞を分離し、これによって固形腫瘍の循環転移性腫瘍細胞を単離することと
を含み、前記抗体は、
(a)配列番号3の第1のVHCDRと、
(b)配列番号4の第2のVHCDRと、
(c)配列番号5の第3のVHCDRと、
(d)配列番号6の第1のVLCDRと、
(e)配列番号7の第2のVLCDRと、
(f)配列番号8の第3のVLCDRと、を含む、方法。 - (i)サンプルの、細胞表面ビメンチンに結合する抗体との前記インキュベートに先立って、前記サンプルからCD45陽性細胞を枯渇させること;
(ii)前記サンプルをEpCAMまたはサイトケラチン抗体とインキュベートすること;
(iii)フローサイトメトリー、免疫組織化学法、蛍光顕微鏡法、ラジオイムノアッセイ、またはELISAを用いて、前記抗体結合細胞を検出すること;
(iv)前記サンプルをタンパク質チロシンホスファターゼ阻害物質とインキュベートすることによって、細胞表面ビメンチンの発現のレベルを増加させること;または
(v)前記単離された生循環腫瘍細胞を遺伝子型特定すること
をさらに含む、請求項1に記載の方法。 - 単離することが、免疫磁気捕捉、接着に基づく細胞選別法、磁気活性化細胞選別法、または蛍光活性化細胞選別法(FACS)を含む、請求項1に記載の方法。
- 前記タンパク質チロシンホスファターゼ阻害物質が、オルトバナジウム酸ナトリウム、デホスタチン、mpV(pic)、フェニルアルシンオキシド、スチボグルコン酸ナトリウム、BAY U6751、チロシンホスファターゼ阻害物質カクテル(バナジウム酸ナトリウム、モリブデン酸ナトリウム、酒石酸ナトリウム、及びイミダゾールを含む)、ならびにRK−682から選択される、請求項2に記載の方法。
- 前記患者における循環転移性腫瘍細胞の数を定量化することをさらに含む、請求項1に記載の方法。
- 前記患者が、上皮腫瘍または間葉腫瘍を有する、請求項1に記載の方法。
- (a)配列番号3の第1のVHCDRと、
(b)配列番号4の第2のVHCDRと、
(c)配列番号5の第3のVHCDRと、
(d)配列番号6の第1のVLCDRと、
(e)配列番号7の第2のVLCDRと、
(f)配列番号8の第3のVLCDRと、を含む、細胞表面ビメンチンに特異的に結合する単離された抗体。 - 前記抗体が薬学的に許容し得る担体中で組成物に含まれている、請求項7に記載の抗体。
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