JP2012529281A - 抗EpCAM抗体 - Google Patents
抗EpCAM抗体 Download PDFInfo
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- JP2012529281A JP2012529281A JP2012514538A JP2012514538A JP2012529281A JP 2012529281 A JP2012529281 A JP 2012529281A JP 2012514538 A JP2012514538 A JP 2012514538A JP 2012514538 A JP2012514538 A JP 2012514538A JP 2012529281 A JP2012529281 A JP 2012529281A
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Abstract
【選択図】なし
Description
(a)配列番号5のアミノ酸配列、またはそれに実質的に相同な配列を含む、重鎖CDR1ドメイン、
(b)配列番号6のアミノ酸配列、またはそれに実質的に相同な配列を含む、重鎖CDR2ドメイン、および
(c)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を含む、重鎖CDR3ドメインから成る群より選択される。
(a)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を含む、軽鎖CDR1ドメイン、
(b)配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同な配列を含む、軽鎖CDR2ドメイン、および
(c)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を含む軽鎖CDR3ドメインから成る群より選択される。
(a)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を含む、重鎖CDR3、および
(b)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を含む軽鎖CDR3の双方を含む。
配列番号7のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR3ドメイン、および/または配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を含む軽鎖CDR3ドメインを含む、EpCAMに結合する抗体を提供する。
前記抗体は、任意に、
配列番号6のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR2ドメイン、および/または配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同な配列を含む軽鎖CDR2ドメインをさらに含む、ならびに/あるいは
配列番号5のアミノ酸配列、またはそれに実質的に相同な配列を含む重鎖CDR1ドメイン、および/または
配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を含む軽鎖CDR1ドメインをさらに含む。
配列番号6のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR2ドメイン、および/または配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同な配列を含む軽鎖CDR2ドメインを含む、EpCAMに結合する抗体を提供する。
前記抗体は、任意に、
配列番号7のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR3ドメイン、および/または配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82のアミノ酸配列、またはそれらに実質的に相同な配列を含む軽鎖CDR3ドメインをさらに含む、ならびに/あるいは
配列番号5のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR1ドメイン、および/または
配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を含む軽鎖CDR1ドメインをさらに含む。
配列番号5のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR1ドメイン、および/または配列番号8のアミノ酸配列、もしくはそれに実質的に相同な配列を含む軽鎖CDR1ドメインを含む、EpCAMに結合する抗体を提供する。
前記抗体は、任意に、
配列番号7のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR3ドメイン、および/または配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82のアミノ酸配列、またはそれらに実質的に相同な配列を含む軽鎖CDR3ドメインをさらに含む、ならびに/あるいは
配列番号6のアミノ酸配列、もしくはそれに実質的に相同な配列を含む重鎖CDR2ドメイン、および/または
配列番号もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同な配列を含む軽鎖CDR2ドメインをさらに含む。
配列番号5の重鎖CDR1ドメイン、
配列番号6の重鎖CDR2ドメイン、および
配列番号7の重鎖CDR3ドメイン、
または前述の配列のいずれか1つに実質的に相同な配列を含む、
ならびに/あるいは
配列番号8の軽鎖CDR1ドメイン、
配列番号9の軽鎖CDR2ドメイン、および
配列番号10の軽鎖CDR3ドメイン、
または前述の配列のいずれか1つに実質的に相同な配列を含む。
(c)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3を含む。
(a)配列番号5のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR1、
(b)配列番号6のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR2、および
(c)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3含む。
(d)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を有する可変軽鎖(VL)CDR1、
(e)配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同である配列を有するVL CDR2、および
(f)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を有するVL CDR3から成る群より選択される。
(d)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を有する可変軽鎖(VL)CDR1、
(e)配列番号9もしくは配列番号29のアミノ酸配列、またはそれに実質的に相同である配列を有するVL CDR2、および
(f)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を有するVL CDR3から成る群より選択される。
(d)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を有する可変軽鎖(VL)CDR1、
(e)配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同である配列を有するVL CDR2、および
(f)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を有するVL CDR3から成る群より選択される。
(i)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を有する可変軽鎖(VL)CDR1、
(ii)配列番号9もしくは配列番号29のアミノ酸配列、またはそれらに実質的に相同である配列を有するVL CDR2、および
(iii)配列番号10、配列番号30、配列番号43、配列番号56、配列番号69、もしくは配列番号82、またはそれらに実質的に相同な配列を有するVL CDR3を含む。
(i)配列番号5のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR1、
(ii)配列番号6のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR2、および
(iii)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3から成る群より選択される。
(i)配列番号5のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR1、
(ii)配列番号6のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR2、および
(iii)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3から成る群より選択される。
(i)配列番号5のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR1、
(ii)配列番号6のアミノ酸配列、またはそれに実質的に相同である配列を有するVH CDR2、および
配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3から成る群より選択される。
配列番号5、6、もしくは7、または配列番号5、6、もしくは7のうちの1つ以上に実質的に相同な配列の重鎖CDRのうちの1つ、2つもしくは3つを含むVHドメイン、および/または
配列番号8(VL CDR1において)、9もしくは29(VL CDR2において)、または10、30、43、56、69、もしくは82(VL CDR3において)、またはそれらの配列のうちの1つ以上に実質的に相同な配列の軽鎖CDRの1つ、2つもしくは3つを含む、VLドメインを含む抗体を提供する。
配列番号5、6、および7の3つの重鎖CDRを含むVHドメイン、ならびに
3つの軽鎖CDRを含むVLドメインを含む抗体を提供する。好ましい実施形態において、軽鎖CDRのうちの1つ、2つ、または3つは、配列番号8、9、および10に定義される通りである。それらに実質的に相同な配列も含まれる。
配列番号8、9、および10の3つの軽鎖CDRを含むVLドメイン、および
3つの重鎖CDRを含むVHドメインを含む抗体を提供する。好ましい実施形態において、重鎖CDRのうちの1つ、2つ、または3つは、配列番号5、6、および7に定義される通りである。
(a)遊離EpCAM、例えば、ELISAアッセイもしくはBIAcoreアッセイにより評価される、固体支持体上で、例えば、組み換えにより発現するEpCAMに結合する、
(b) 例えば、非還元条件下で、ウェスタンブロットにおいて、EpCAMへの結合により評価される、立体構造的依存性(例えば、非線形)EpCAMエピトープに結合する、
(c)例えば、フローサイトメトリーまたは免疫組織化学検査により評価される、細胞の表面上に発現するEpCAMに結合する、
(d)少なくともヒトEpCAM、より好ましくは、ヒトおよびサルのEpCAM、またはヒトおよびマウスのEpCAM、最も好ましくは、ヒト、サル、およびマウスのEpCAMに結合する、
(e)本明細書の別の箇所でも説明される、10nM以下、好ましくは5nM以下、より好ましくは3nM以下、または2nM以下、最も好ましくは1nM以下の結合親和性(Kd)でヒトEpCAMに結合する、
(f)本明細書の別の箇所でも説明される、同様の親和性で、例えば、10nM以下、好ましくは5nM以下、より好ましくは3nM以下、または2nM以下、例えば、1nM以下のKdで、ヒトおよびサルのEpCAM、またはヒトおよびマウスのEpCAMに結合する。
(g)腫瘍を有する動物への投与により、腫瘍に局在される、
(h)本明細書の別の箇所に記載される、腫瘍細胞のADCCを誘発する、
(i)本明細書の別の箇所に記載される、腫瘍細胞のCDCを誘発する、
(j)in vivoで、抗腫瘍作用を誘発する。
が計算される。
(c)配列番号7のアミノ酸配列、もしくはそれに実質的に相同な配列を有するVH CDR3、または
(a)配列番号5のアミノ酸配列、もしくはそれに実質的に相同な配列を有する可変重鎖(VH)CDR1、
(b)配列番号6のアミノ酸配列、もしくはそれに実質的に相同な配列を有するVH CDR2、および
(c)配列番号7のアミノ酸配列、もしくはそれに実質的に相同な配列を有するVH CDR3を含む。
(a)動物または患者を、実質的に腫瘍量を低減する第1の治療に曝すことと、
(b)実質的に、少なくとも第1の本発明の抗EpCAM抗体、その抗原結合断片、またはその免疫抱合体を投与することとを含み、任意に、抗体または断片は、第2の治療剤と操作可能に会合される。
(a)上記動物から採取した試験試料を本発明の抗体、またはその免疫抱合体と接触させるステップを含む。
(a) 上記動物から採取した試験試料を本発明の抗体、またはその免疫抱合体と接触させるステップと、
(b)試験試料における抗体−抗原複合体の存在、および/もしくは量、および/もしくは位置を測定する、または検出するステップと、任意に、
(c)試験試料における抗体−抗原複合体の存在、および/または量を対照と比較するステップとを含む。
本発明は、検出可能なシグナルを直接的または間接的に産生する標識に結合される、本発明の抗体を含む診断剤または撮像剤も含む。適切な標識は、本発明の別の箇所に記載される。
(a)本発明の抗EpCAM抗体に操作可能に結合された診断剤を含む、腫瘍を有する動物または患者に診断量の少なくとも第1の検出可能な標識された本発明の抗EpCAM抗体を投与し、それによって、腫瘍の検出可能な画像を形成することにより、腫瘍の画像を形成することと、
(b) 実質的に、同じ動物または患者に治療的に最適な量の少なくとも本発明の第1の裸抗EpCAM抗体、またはそのような抗体を使用する治療剤−抗体構築物を投与し、それによって、抗腫瘍作用をもたらすことによっても行うことができる。
癌治療として使用することができるさらなる腫瘍特異的抗体の必要性を考慮して、HT29等の結腸癌細胞株を特異的に認識するヒト抗体が識別された。抗体は、特異的にEpCAMに結合することができる。抗体の単一鎖形態を、c−mycおよび6xHisタグエピトープを含有するpHOG21プラスミドにクローン化した(図8)。TG1細菌を形質転換し、IPTG誘発によりscFvを発現させた。精製されたscFvの結合は、Easycyteフローサイトメーターを使用して、フローサイトメトリーにより確認された。
クローンを産生する抗体の重鎖および軽鎖のヌクレオチド配列を配列決定した。抗体は、3−17I(scFv)と表される。3−17I(scFv)の軽鎖および重鎖のヌクレオチド配列とアミノ酸配列を図1および表1に示す。3−17Iの軽鎖および重鎖のCDR領域を表1に示す。
3−17I IgGのEpCAM陽性細胞への結合を分析するために、フローサイトメトリー分析を実施した。陽性対照として、抗EpCAMキメラ(マウス可変/ヒト定常ドメイン)および、完全ヒト抗体であるMOC31およびMT201を、それぞれ使用した。
3−17IのEpCAMに結合する能力を決定するために、ウェスタンブロット法、ELISA、およびBIAcoreアッセイを実施した。
抗体3−17I、MT201、およびMOC31のヒトおよびカニクイザルのEpCAMへの結合特異性および交差反応性を分析するために、ドデシル硫酸ナトリウムポリアクリルアミドゲル電気泳動(SDS−PAGE)およびウェスタンブロット分析を、還元条件および非還元条件下で実施した。全ての抗体はIgG形態であり、過渡的に形質移入されたHEK−293細胞において産生された。次いで、抗体をプロテインAセファロース(GE Healthcare,Uppsala,Sweden)上で精製した後、2つの連続して連結されたサイズ排除カラムのSuperdex 200およびSuperdex 75上で分画した。得られたIgG調製物は、>95%純度の単量体であるように思われた。組み換えヒトおよびカニクイザルのEpCAM抗原もHEK−293細胞において産生され、プロテインAセファロースカラム上で、1ステップで精製された。抗原調製物の決定された純度は、90%を上回った。双方のEpCAM構築物は、IgG1からのヒトFc領域に融合したEpCAMの細胞外ドメインから成る。
3−17I、MT201、およびMOC31のヒトおよびカニクイザルのEpCAMへの特異性および親和性を決定するために、一連のELISA実験を実施した。IgG1形式の全ての抗体、ならびにヒトおよびカニクイザルのEpCAM抗原を、前述に示すように産生し、精製した(実施例1および実施例2、ならびに実施例3の始めを参照)。
ELISAデータは、3−17I IgGのヒトおよびカニクイザルのEpCAMの双方への同等に良好な結合を実証した(図4A)。逆に、MOC31抗体は、ヒトおよびカニクイザルの抗原に対して、顕著に異なる結合パターンを示し(図4C)、よって、カニクイザルEpCAMに対して非常に低い親和性を示した。興味深いことに、抗体MT201は、ヒトEpCAMに対して比較的弱い結合のみを示し、この抗体のカニクイザル抗原への結合は、検出されなかった(図4B)。
3−17IのヒトおよびカニクイザルのEpCAMへの結合は、BIAcore T100(BIAcore,Inc,Piscataway,NJ)の表面プラスモン共鳴(SPR)を使用して分析された。ヒトFc(IgG1)に融合したヒトまたはカニクイザルのEpCAMの細胞外ドメインは、100RUの密度で、CM5チップ(BIAcore,Inc,Piscataway,NJ)に結合された。流速50μl/分、37℃で、標準的な技法を使用して、SPR試験を実施した。データは、BIAcoreソフトウェアの1:1ラングミュア結合モデルを使用して分析された。
3−17I IgGのADCCおよび/またはCDCを介して標的細胞死滅を媒介する能力を決定するために、機能アッセイを実施した。これらの試験からの結果は、3−17I IgGがADCCおよびCDCを媒介することを示す。加えて、これらのデータは、ADCCおよびCDCの双方の誘発において、MT201 IgGに対する3−17I IgGの優位性を明らかに示す。
3−17I IgGのADCCを誘発する能力は、EpCAMの面密度において100倍を超える様々な相違を網羅する、3つの異なる乳癌細胞株であるMDA−MB−231、MDA−453、およびBT−474を使用して分析された(Prangら、2005)。これら全ての細胞株上でADCCを誘発することがPrangらによって報告されたため、MT201 IgGが陽性対照抗体として使用された。MDA−MB−453(乳房乳腺、ATCC番号HTB−131)、MDA−MB−231(乳房乳腺、ATCC番号HTB−26)、およびBT−474(乳房乳腺、ATCC番号HTB−20)細胞株は、American Type Culture Collection(ATCC,Rockville,MD)から得た。
3−17I IgGの補体依存性細胞障害(CDC)を誘発する能力は、2つの細胞株KATO IIIおよびMT−3を使用して分析された。3つの関連する抗体クローン12−C15 IgG、16−G5 IgG、および17−C20 IgGも、KATO III細胞株を使用して、CDCを誘発するそれらの能力について試験された。MT201 IgGは、これらの細胞株上でCDCを誘発することがPrangら(2005)によって報告されたため、陽性対照抗体として使用された。KATO III(胃癌、ATCC番号HTB−103)およびMT−3(乳癌、DSMZ番号ACC403)細胞株は、それぞれ、American Type Culture Collection(ATCC,Rockville,MD)およびDSMZ(Braunschweig,Germany)から得た。KATO IIIおよびMT−3細胞は、それぞれ、20%および10%のウシ胎仔血清を添加したRPMI−1640培養培地で維持された。全ての培地をペニシリンおよびストレプトマイシンで補充した。全ての細胞培地および補充物は、PAA(Pasching,Austria)から得た。
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配列番号37:
コンセンサス配列
Xaaはいずれのアミノ酸であってもよい
Xaaはいずれのアミノ酸であってもよい
配列番号38:
コンセンサス配列
Xaaはいずれのアミノ酸であってもよい
Xaaはいずれのアミノ酸であってもよい
配列番号89:
コンセンサス配列
Xaaはいずれのアミノ酸であってもよい
Xaaはいずれのアミノ酸であってもよい
Xaaはいずれのアミノ酸であってもよい
Xaaはいずれのアミノ酸であってもよい
配列番号90:
コンセンサス配列
XaaはGlnまたはHisまたはLysであってよい
XaaはAsnまたはAspであってよい
XaaはGlyまたはThrまたはSerまたはmetまたはAlaであってよい
XaaはPheまたはTrpまたはTyrであってよい
配列番号92:MT201 IgG軽鎖
配列番号93:MOC31 IgG重鎖
配列番号94:MOC31 IgG軽鎖
配列番号95:ヒト EpCAM/Fc 融合物
配列番号96:カニクイザル EpCAM/Fc 融合物
配列番号97:制限部位を有する scFV 3-17I
Claims (43)
- EpCAMに結合し、3つのCDRを含む少なくとも1つの重鎖可変領域と、3つのCDRを含む少なくとも1つの軽鎖可変領域とを含む抗体であって、前記重鎖可変領域は、
(c)配列番号7のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR3であって、前記実質的に相同な配列は、所与のCDR配列と比較して、1つ、2つ、もしくは3つのアミノ酸置換を含有する配列であるか、または前記実質的に相同な配列は、所与のCDR配列の保存アミノ酸置換を含有する配列である、VH CDR3
を含む、抗体。 - 前記重鎖可変領域CDRの1つ以上は、
(a)配列番号5のアミノ酸配列、またはそれに実質的に相同な配列を有する可変重鎖(VH)CDR1、および
(b)配列番号6のアミノ酸配列、またはそれに実質的に相同な配列を有するVH CDR2
から成る群より選択され、
前記実質的に相同な配列は、所与のCDR配列と比較して、1つ、2つ、もしくは3つのアミノ酸置換を含有する配列であるか、または前記実質的に相同な配列は、所与のCDR配列の保存アミノ酸置換を含有する配列である、請求項1に記載の抗体。 - 前記軽鎖可変領域CDRの1つ以上は、
(d)配列番号8のアミノ酸配列、またはそれに実質的に相同な配列を有する可変軽鎖(VL)CDR1、
(e)G A S T X5 A X7(配列番号37)のアミノ酸配列、またはそれに実質的に相同な配列を有し、X5およびX7は、任意のアミノ酸であり得るVL CDR2、および
(f)Q X2 Y N X5 W P P X9 X10 T(配列番号89)のアミノ酸配列、またはそれに実質的に相同な配列を有し、X2、X5、X9、およびX10は、任意のアミノ酸であり得るVL CDR3
から成る群より選択され、
前記実質的に相同な配列は、所与のCDR配列と比較して、1つ、2つ、または3つのアミノ酸置換を含有する配列であるか、または前記実質的に相同な配列は、所与のCDR配列の保存アミノ酸置換を含有する配列である、請求項1または請求項2に記載の抗体。 - 前記(e)のVL CDR2において、
X5は、RもしくはT、好ましくはTであり、かつ/または
X7は、TもしくはS、好ましくはSであり、かつ/あるいは
前記(f)のVL CDR3において、
X2は、QもしくはHもしくはK、好ましくはQであり、
X5は、NもしくはD、好ましくはNであり、
X9は、GもしくはTもしくはSもしくはMもしくはA、好ましくはAであり、かつ/または
X10は、FもしくはWもしくはY、好ましくはYである、請求項3に記載の抗体。 - 前記(e)のVL CDR2は、配列番号9もしくは配列番号29のアミノ酸配列、またはそれに実質的に相同な配列を有し、かつ/あるいは前記(f)のVL CDR3は、配列番号10、30、43、56、69、もしくは82のアミノ酸配列、またはそれに実質的に相同な配列を有する、請求項3または請求項4に記載の抗体。
- 前記重鎖CDRドメイン(a)、(b)、および(c)のそれぞれのうちの1つ、ならびに/または前記軽鎖CDRドメイン(d)、(e)、および(f)のそれぞれのうちの1つを含む、請求項1〜5のいずれか1項に記載の抗体。
- 前記3つの軽鎖可変領域CDRは、配列番号8、9、および10、または配列番号8、29、および30、または配列番号8、29、および43、または配列番号8、29、および56、または配列番号8、29、および69、または配列番号8、29、および82、あるいはそれらに実質的に相同な配列である、請求項1〜6のいずれか1項に記載の抗体。
- 前記重鎖可変領域は、配列番号3のアミノ酸配列、またはそれに少なくとも70%、80%、90%、95%、または98%の配列同一性を有する配列を含む、請求項1〜7のいずれか1項に記載の抗体。
- 前記軽鎖可変領域は、配列番号4、27、40、53、66、もしくは79のアミノ酸配列、またはそれに少なくとも70%、80%、90%、95%、もしくは98%の配列同一性を有する配列を含む、請求項1〜8のいずれか1項に記載の抗体。
- 前記抗体は、配列番号21、36、49、62、75、もしくは88のアミノ酸配列、またはそれに少なくとも70%、80%、90%、95%、もしくは98%の配列同一性を有する配列を含む、請求項1〜9のいずれか1項に記載の抗体。
- 前記抗体は、ヒトおよびサルの双方のEpCAMに結合することが可能である、請求項1〜10のいずれか1項に記載の抗体。
- 配列番号5のアミノ酸配列を有するVH CDR1、配列番号6のアミノ酸配列を有するVH CDR2、配列番号7のアミノ酸配列を有するVH CDR3、配列番号8のアミノ酸配列を有するVL CDR1、配列番号9のアミノ酸配列を有するVL CDR2、および配列番号10のアミノ酸配列を有するVL CDR3を含む、請求項1〜11のいずれか1項に記載の抗体、または前記抗体とEpCAMへの結合において競合することができる抗体。
- 前記抗体は、完全ヒト抗体である、請求項1〜12のいずれか1項に記載の抗体。
- 前記抗体は、抗体重鎖定常領域および/または抗体軽鎖定常領域の全てもしくは一部を含む、請求項1〜13のいずれか1項に記載の抗体。
- 前記抗体はIgG抗体である、請求項14に記載の抗体。
- 前記抗体は、配列番号24のアミノ酸配列、またはそれに少なくとも70%、80%、90%、95%、もしくは98%の配列同一性を有する配列を含む重鎖と、配列番号25、51、64、もしくは77のアミノ酸配列、またはそれに少なくとも70%、80%、90%、95%、もしくは98%の配列同一性を有する配列を含む軽鎖とを含む、請求項14または請求項15に記載の抗体。
- 前記抗体は、抗体の抗原結合断片である、請求項1〜16のいずれか1項に記載の抗体。
- 前記抗体の前記抗原結合断片は、Fab’、Fab、F(ab’)2、単一ドメイン抗体、TandAbsダイマー、Fv、scFv、dsFv、ds−scFv、Fd、直鎖状抗体、ミニボディ[minibody]、二特異性抗体[diabody]、二重特異性抗体断片[bispecific antibody fragment]、バイボディ[bibody]、トリボディ[tribody]、sc−二特異性抗体[sc-diabody]、カッパ(ラムダ)ボディ、BiTE、DVD−Ig、SIP、SMIP、DART、または1つ以上のCDRを含む小抗体模倣物[small antibody mimetic]である、請求項17に記載の抗体。
- 少なくとも第2の診断剤または治療剤に結合させた請求項1〜18のいずれか1項の抗体を含む免疫抱合体。
- 前記抗体は、放射線治療剤、化学療法剤、抗血管新生剤、アポトーシス誘発剤、抗チューブリン剤、抗細胞もしくは細胞障害性薬物、ステロイド、サイトカイン、ケモカイン、ATPase阻害剤、別の抗体、または血液凝固剤に結合される、請求項19に記載の免疫抱合体。
- 前記抗体は別の抗体に結合され、前記免疫抱合体は二重特異性抗体または二特異性抗体を含む、請求項20に記載の免疫抱合体。
- 請求項1〜21のいずれか1項に記載の抗体を含む結合タンパク質。
- 少なくとも、請求項1〜18のいずれか1項に記載の第1の抗体またはその免疫抱合体を含む組成物。
- 前記組成物は、薬学的に許容される組成物である、請求項23に記載の組成物。
- 前記組成物は、少なくとも第2の治療剤をさらに含む、請求項23または請求項24に記載の組成物。
- 請求項1〜18のいずれか1項に記載の抗体をコードするヌクレオチド配列領域を含む核酸分子。
- 前記ヌクレオチド配列領域は、配列番号1のヌクレオチド配列、および任意に配列番号2、26、39、52、65、もしくは78のヌクレオチド配列、またはそれらに少なくとも70%の配列同一性を有する配列を含む、請求項26に記載の核酸分子。
- 請求項26または請求項27に記載の核酸分子を含む発現ベクター。
- 請求項26もしくは請求項27に記載の核酸分子、または請求項28に記載の発現ベクターを含む、宿主細胞またはウイルス。
- 少なくとも第1の容器に、
(a)請求項1〜18のいずれか1項に記載の抗体、
(b)請求項19〜21のいずれか1項に記載の免疫抱合体、
(c)請求項23〜25のいずれか1項に記載の組成物、
(d)請求項26または請求項27に記載の核酸分子、
(e)請求項28に記載の発現ベクター、
(f)請求項29に記載の宿主細胞、または、
(g)請求項29に記載のウイルス
を含むキット。 - 抗体を産生する方法であって、
(a)前記コードされた抗体を発現するのに効果的な条件下で、請求項26もしくは請求項27に記載の核酸分子、または請求項28に記載の発現ベクターを含む宿主細胞を培養することと、
(b)前記宿主細胞から前記発現した抗体を得ることと
を含む方法。 - EpCAMに結合する方法であって、EpCAMを含む組成物を、請求項1〜18のいずれか1項に記載の抗体、またはその免疫抱合体と接触させることを含む方法。
- EpCAMを検出する方法であって、EpCAM/抗体複合体の形成を可能にするのに効果的な条件下で、EpCAMを含有すると疑われる組成物を、請求項1〜18のいずれか1項に記載の抗体、またはその免疫抱合体と接触させることと、そのように形成された前記複合体を検出することと、を含む方法。
- 動物における癌を診断する方法であって、
(a)EpCAM/抗体複合体の形成を可能にするのに効果的な条件下で、動物、または前記動物から採取した試験試料を、請求項1〜18のいずれか1項に記載の抗体、またはその免疫抱合体と接触させることを含む方法。 - 前記方法は、
(b)前記試験試料中の抗体−抗原複合体の存在、および/または量、および/または位置を測定するか、または検出すること、ならびに、
任意に、
(c)前記試験試料中の抗体−抗原複合体の前記存在および/または量を対照と比較すること、をさらに含む、請求項34に記載の方法。 - 癌を治療する方法であって、動物に請求項1〜18のいずれか1項に記載の抗体、またはその免疫抱合体を、前記動物の癌を治療するのに効果的な量で投与することを含む方法。
- 第2の治療剤を前記動物に投与することをさらに含む、請求項36に記載の方法。
- 前記動物はヒト対象である、請求項34〜37のいずれか1項に記載の方法。
- 療法、撮像、または診断に使用するための、請求項1〜18のいずれか1項に記載の抗体またはその免疫抱合体。
- 癌の療法、撮像、または診断に使用するための、請求項39に記載の抗体または免疫抱合体。
- 前記癌の治療のための薬剤の製造において、請求項1〜18のいずれか1項に記載の抗体またはその免疫抱合体の使用。
- 前記癌は、乳癌、結腸直腸癌、前立腺癌、卵巣癌、膀胱癌、胆嚢癌、膵臓癌、肺癌、胃組織もしくは内臓の癌、好ましくは胃癌もしくは食道癌、肝臓癌、好ましくは肝細胞癌、腎臓癌、好ましくは腎細胞癌、皮膚腫瘍、頭頚部癌、好ましくは膠腫、唇癌、口癌、膣癌、および子宮頸部癌からなる群より選択される、請求項39もしくは請求項40の抗体もしくは免疫抱合体、または請求項36〜38のいずれか1項に記載の方法、または請求項41に記載の使用。
- 第2の治療剤の使用をさらに含む、請求項39もしくは請求項40もしくは請求項42の抗体もしくは免疫抱合体、または請求項36〜38のいずれか1項に記載の方法、または請求項41に記載の使用。
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US61/185,387 | 2009-06-09 | ||
PCT/GB2010/050969 WO2010142990A1 (en) | 2009-06-09 | 2010-06-09 | ANTI-EpCAM ANTIBODIES |
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BR (1) | BRPI1011005A2 (ja) |
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