JP7294758B2 - 抗cd24組成物及びその使用 - Google Patents
抗cd24組成物及びその使用 Download PDFInfo
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- JP7294758B2 JP7294758B2 JP2020564389A JP2020564389A JP7294758B2 JP 7294758 B2 JP7294758 B2 JP 7294758B2 JP 2020564389 A JP2020564389 A JP 2020564389A JP 2020564389 A JP2020564389 A JP 2020564389A JP 7294758 B2 JP7294758 B2 JP 7294758B2
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- C07K2319/033—Fusion polypeptide containing a localisation/targetting motif containing a motif for targeting to the internal surface of the plasma membrane, e.g. containing a myristoylation motif
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- C07K2319/23—Fusion polypeptide containing a tag with affinity for a non-protein ligand containing a GST-tag
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/33—Fusion polypeptide fusions for targeting to specific cell types, e.g. tissue specific targeting, targeting of a bacterial subspecies
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
- G01N2333/70596—Molecules with a "CD"-designation not provided for elsewhere in G01N2333/705
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Description
本明細書で使用される用語は、特定の実施形態を説明することのみを目的としており、限定することを意図していない。本明細書および添付の特許請求の範囲において使用されるとき、「a」、「an」、および「the」という単数形は、その内容について別段の明確な指示がない限り、複数の指示対象を包含する。数値と関連付けられた「約」という語は、その値の妥当な近似値を示す。ある場合には、「約」はそれが付された特定の値の10%以内であるものとして解釈されてもよい。例えば、「100μm」という語句は、90と110との間の任意の値を包含する。
本明細書に記載されるのは、CD24のがん特異的グリコフォームを特異的に標的とし得る抗CD24抗体である。前記抗CD24抗体は、抗体薬物複合体、ADCC強化治療用抗体、二重特異性抗体、CAR-T治療剤、及びTCR治療剤を含むがこれらに限定されないがん治療剤を開発するために使用され得る。具体的には、前記抗CD24抗体又はその抗原結合断片は非がん性細胞上にはないががん細胞上には露出している糖鎖で遮蔽されているエピトープに結合し得る。特に、前記抗CD24抗体又はその抗原結合断片は、アミノ酸配列SNSGLAPN(配列番号48)を含むCD24ペプチドに結合し得る。
腫瘍標的化抗体は、腫瘍の生態に影響を与えることにより、腫瘍増殖を直接的に阻止又は制限するために使用され得る。例えば、ヒト化抗VEGFモノクローナル抗体(一般名:ベバシズマブ(Bevacizumab);アバスチン(Avastin))は、VEGF誘発腫瘍血管新生を阻止することによって腫瘍増殖をブロックする。他の腫瘍標的化抗体は、抗体自体の修飾を通じて腫瘍細胞増殖を阻害したり、がん細胞を死滅させたりするために使用される。例えば、腫瘍を標的とした免疫複合体は、共有結合架橋又は遺伝子融合のいずれかによって結合された抗体とエフェクター部分とからなる。エフェクター部分は、細胞傷害性薬(抗体薬物複合体)、タンパク質毒素(免疫毒素)、又は放射性核種(放射性免疫複合体)でありうる。抗体薬物複合体の例として、ブレンツキシマブベドチン(Brentuximab Vedotin)(ADCETRIS(登録商標)、Seattle Genetics社)が挙げられ、これは3~5単位の有糸分裂阻害剤モノメチルオーリスタチンE(Monomethyl auristatin E、MMAE(薬剤名の「ベドチン」に反映))に結合したキメラモノクローナル抗体であるブレンツキシマブ(細胞膜タンパク質CD30を標的とするcAC10)からなる。
前記抗CD24抗体若しくはその抗原結合断片又は前述のうち1つを含む抗体組成物を使用して、抗体介在性細胞傷害(antibody-mediated cellular cytotoxicity)(ADCC)及び抗体介在性細胞貪食(antibody-mediated cellular phagocytosis)(ADCP)のうち少なくとも1つを介したがん細胞死を誘発する(stimulate)ことができる。ADCCは免疫防御メカニズムであり、身体の特定の免疫細胞(エフェクター細胞)のセットが標的細胞(例えば、病原体)に積極的に関与して溶解する。ADCCは、重要な細胞性自然免疫応答として識別されており、病原体に対する身体の第一線の防御として機能し、感染を制限し封じ込める作用を持つ。ADCCプロセスは、非食細胞プロセス(non-phagocytic process)を介して抗体でコーティングされた標的細胞を死滅させるように設計されており、標的を定めた細胞傷害性顆粒の放出又は細胞死誘導分子の発現のいずれかを特徴とする。ADCCは典型的には、宿主の特定の抗体(主にIgGクラス)が標的細胞の膜表面抗原を認識して結合し、同時にエフェクター細胞表面のFc受容体(FcR)に関与する時点で開始される。ADCCを媒介する最も一般的なエフェクター細胞はナチュラルキラー(NK)細胞であるが、単球、マクロファージ、好中球、好酸球、樹状細胞もADCC応答を媒介することができる。ADCCはある程度速い応答であるが、有効性は、標的細胞の表面の抗原密度及び抗原抗体相互作用の親和性並びにFc受容体ファミリーの様々なメンバーとの抗体相互作用を決定するFc断片の特性など、いくつかのパラメーターによって異なる。
本明細書でさらに提供されるのは、第2の抗体又はその抗原結合断片に架橋された第1の抗体又はその抗原結合断片を含む第1の抗体ドメインを含む二重特異性抗体である。前記第1の抗体ドメインは、本明細書に記載の抗CD24抗体又はその抗原結合断片を含み得、前記第2の抗体又はその抗原結合断片は、他の免疫刺激分子に結合し得る。特定の実施形態では、前記第2の抗体ドメインは、抗CD3抗体又はその抗原結合断片を含む。この場合、前記二重特異性抗体は、CD24のがん特異的グリコフォームを発現する腫瘍細胞を特異的に標的とし、同時に細胞傷害性T細胞上のCD3に結合し、それによってT細胞を腫瘍部位に引き付け、前記T細胞が腫瘍に浸潤して腫瘍の細胞傷害性を引き起こす。細胞傷害性T細胞又は他のエフェクター細胞を腫瘍部位に引き付ける目的で二重特異性抗体で使用するためのパートナー抗体の他の例は、当技術分野で公知である。
キメラ抗原受容体(Chimeric Antigen Receptor、CAR)T細胞治療剤、又はCAR-T治療剤は、がん患者のT細胞がエクスビボで遺伝子改変されて、CARタンパク質を発現し、がん細胞を攻撃する細胞処置の一種である。具体的には、T細胞が患者の血液(特に患者自身の血液(自家))から採取され、組換えCAR受容体を発現する遺伝子構築物でトランスフェクトされる。次に、多数のCAR-T細胞を実験室で増殖して患者に注入し、患者のがん細胞を標的にして破壊することができる。T細胞はまた、マッチしたドナーからの、又は、同種異系T細胞の1又は複数のTCR遺伝子及びHLAクラスI遺伝子座が破壊され、結果として生じるT細胞は同種異系抗原を認識できない、ユニバーサルT細胞株若しくは「在庫の既製品から入手可能な(off-the-shelf)」T細胞株に由来する、同種異系T細胞である。
CAR-T治療剤と同様に、遺伝子改変T細胞受容体治療剤(TCR)は、がん患者のT細胞をエクスビボで遺伝子改変して、改変TCRを発現させ、T細胞を患者に注入した際にT細胞受容体が特定の抗原性細胞抗原を認識して攻撃する能力を向上させる細胞処置の一種である。ただし、表面に発現するタンパク質を認識するCAR-T細胞とは異なり、遺伝子改変TCRを使用したT細胞免疫治療剤は、固形腫瘍をより標的としてきた。TCRは、細胞内部の腫瘍特異的タンパク質を認識し得る。腫瘍特異的タンパク質が断片に分解されると、それらは主要組織適合遺伝子複合体(Major Histocompatibility Complex)又はMHCと呼ばれる別のタンパク質と共に細胞表面に現れる。TCRは、腫瘍特異的タンパク質断片/MHCの組み合わせを認識するように設計されている。TCR改変T細胞の標的の例として、KITE-718(Kite Pharma社)などMAGE-A3を標的とするもの、JTCR016 (Juno Therapeutics)などのウィルムス腫瘍抗原1(WT-1)、及びNY-ESO 1が挙げられる。
本明細書に記載の抗CD24抗体又はその抗原結合断片は、がん細胞上に露出しているが非がん性細胞上には露出していない、糖鎖で遮蔽されているエピトープに結合し得る。具体的には、前記抗CD24抗体又はその抗原結合断片は、アミノ酸配列SNSGLAPN(配列番号48)を含むCD24ペプチドに結合し得る。したがって、配列番号48に示される配列を含むペプチドを使用して、配列番号48に示される配列のコア配列を含むエピトープに結合する抗CD24抗体を中和し得る。これは、中和抗体を検出するための抗薬物抗体アッセイで使用され得る。配列番号48に示される配列を含むペプチドは、配列番号48に示される配列のコアを含むエピトープに結合する抗体に関連する潜在的な有害作用を阻害するために使用されうる。前記ペプチドは当技術分野で公知の方法を使用して、インビボ使用のためのより良い安定性のために修飾されてもよく、前記方法としてはD-アミノ酸の使用、1又は複数のペプチド結合におけるOからSへの置換、溶解性又は半減期を改善するための融合配列の追加(例えば、アルブミン融合)が挙げられるが、これらに限定されない。さらに別の実施形態では、配列番号48に示すアミノ酸配列を含む分子は、がんの処置及び予防のためのワクチンとして使用され得る。
本明細書に記載の抗CD24抗体組成物又はかかる抗体組成物を含む細胞治療剤は、がん又は別の異常な増殖性疾患を処置又は予防するために使用され得る。本明細書に提供されるのは、かかる使用を必要とする患者におけるかかる使用の方法であり、抗CD24抗体又はその抗原結合断片、あるいは前述の抗体又は断片を含む医薬組成物を、患者に投与することを含み得る。かかる分子及び医薬組成物はまた、がん又は他の異常な増殖性疾患を処置又は予防するための薬剤の製造において使用され得る。本明細書で使用される場合、「がん」という用語は、細胞の異常な、制御されていない増殖に起因する新生物又は腫瘍を意味する。本明細書で使用される場合、がんには、白血病及びリンパ腫が明示的に含まれる。前記用語は、遠位部位に転移する可能性のある細胞が関与する疾患を意味する。前記患者はヒトであり得る。
前記抗CD24抗体又はその抗原結合フラグメントは、真核生物発現系を使用して作製されてもよい。発現系は、チャイニーズハムスター卵巣(CHO)細胞などの哺乳動物細胞におけるベクターからの発現を伴っていてもよい。発現系はまた、真核細胞に感染するために使用され得る複製欠損レトロウイルスベクターなどの、ウイルスベクターであってもよい。前記抗CD24抗体又はその抗原結合フラグメントは、細胞ゲノムに組み込まれたベクター又はベクターの一部から前記抗体を発現する安定細胞株から産生されてもよい。安定細胞株は、組み込まれた複製欠損レトロウイルスベクターから前記抗体を発現してもよい。発現系は、GPEx(商標)であってもよい。
患者においてがんを処置する又は本明細書に記載されるがんの予防(prophylaxis)を提供する方法が、本明細書で提供される。前記方法では、がんに対抗して患者に予防接種(vaccinate)してもよい。前記方法は、配列番号48に示される配列を含む組成物を、それを必要とする患者に投与することを含み得る。前記組成物はまた、抗CD24抗体又はCD24に結合する受容体を発現する細胞の使用を含む治療に関連する有害作用を処置する必要がある患者に投与され得る。前記組成物はまた、がんを処置するための又はがんの予防を提供するための薬剤の製造において使用され得る。
治療有効量の上述の抗CD24抗体、細胞治療剤、又はペプチド組成物のいずれか、及び生理学的に許容される担体又は添加剤(excipient)を含む医薬組成物が本明細書で提供される。前記医薬組成物は、予防的有効量又は治療的有効量の抗CD24抗体又はその抗原結合断片、及び薬学的に許容される担体を含み得る。
前記組成物及び前記医薬組成物を投与する方法は、非経口投与(例えば、皮内、筋肉内、腹腔内、静脈内、及び皮下)、硬膜外投与、及び経粘膜投与(例えば、鼻腔内及び経口経路)を含むが、これらに限定されない。特定の実施形態では、前記組成物は、筋肉内、静脈内、又は皮下に投与される。前記組成物は、例えば、注入又はボーラス注射、上皮又は粘膜皮膚ライニング(例えば、口腔粘膜、直腸及び腸粘膜など)を介した吸収によってなど、任意の簡便な経路によって投与することができ、他の生物学的に活性な薬剤と共に投与してもよい。投与は全身的又は局所的であり得る。
低グリコシル化CD24に対するモノクローナル抗体の生成
腫瘍におけるNEU1及びCD24の過剰発現は、グリコシダーゼの調節不全を示唆する。グリコシダーゼの調節不全は、MUC1と同様にCD24が腫瘍で低グリコシル化されている(hypoglycosylated)可能性があることを示唆している。抗体である3B6の、CD24に対する結合は、シアル酸糖鎖によって妨げられる(図1)。ELISAで検出されるように、市販の抗CD24抗体であるML5(BD bioscience社)と比べて、3B6は、N-SA-CD24及びN-SA-O-CD24には強く結合するが、N-CD24又は完全にグリコシル化されたCD24への結合は弱い。これは、3B6が結合するエピトープが実際にタンパク質主鎖であり、3B6の結合がエピトープのグリコシル化によって妨げられていることを示唆した。
親和性成熟
CD24に対する3B6の結合親和性は、市販の抗体ML5(BD Bioscience社)及びSN3(Thermo Fisher社)と比較してかなり低かった。3B6のその抗原への結合の親和性及び特異性を高めるために、3B6の親和性成熟を行った。最初に、3B6抗体の重鎖(IgH)及び軽鎖(IgL)のクローンを作成し、Ig可変領域配列を以下のとおりに特定した。
3B6及びPP6373によって認識される抗原性エピトープ
3B6及び親和性成熟クローンPP6373によって認識される抗原性エピトープを決定するために、成熟CD24アミノ酸配列(配列番号42)をカバーする重複ペプチドを合成して3B6抗体と事前にインキュベートしてから、N-O-CD24タンパク質(N-グリコシダーゼ、NanA、及びO-グリコシダーゼで順次前処理したCD24Fc)で予めコーティングしたプレートに3B6を添加した。図9に示すように、試験した5つのペプチド(配列番号43~47)のうち、ペプチド4(配列番号46)のみが3B6-CD24相互作用の有意なブロッキングを示したことは、CD24結合エピトープがこの配列に含まれることを示唆する。PP6373が同じエピトープを認識することを確認するために、5つのペプチドを広い用量範囲で滴定した。図10に示すように、ペプチド4のみが、PP6373のSA-N-CD24への結合を用量依存的に阻害した。
正常組織と悪性組織における抗原性エピトープの発現の対比
PP6373によって認識されるエピトープが正常組織に比してがん組織で優先的に提示されるかどうかを判断するために、ビオチン化PP6373を使用した免疫蛍光法による組織結合を分析した。正常組織のデータを表2に要約し、がん組織のデータを表3に要約する。さらに、正常な良性脳腫瘍及び悪性脳腫瘍に対する抗体の結合を評価している。データは表4に要約されている。
PP6373はインビボで肺がんの増殖を遅らせる
PP6373がインビボで腫瘍増殖を遅らせることができるかどうかを試験するために、ヌードマウスにヒト肺がん細胞株H727を皮下投与した。腫瘍が触知可能になった時点で、担がんマウスに5mg/kgのPP6373を2回注射した(H727接種の14日後及び21日後)。図12に示すように、IgG対照と比較して、PP6373で処理した腫瘍では増殖の速度が大幅に減少していた。これらのデータは、未修飾PP6373がインビボで抗腫瘍活性を示し得ることを示している。
PP6373及びOKT3配列に基づく二重特異性抗体
抗CD24抗体を兵器化(weaponize)するために、CD24及びCD3の両方に結合する二重特異性抗体を作成した。一実施形態では、抗CD24抗体及び抗CD3(OKT3)抗体は、それぞれ、CD24及びCD3に対する反応性を有する一本鎖抗体に変換され、可撓性リンカー配列GGGGSGGGGSGGGGS(配列番号49)によって連結される。PP6373一本鎖抗体の配列を配列番号17に示し、OKT3一本鎖配列を配列番号18に示す。
がん治療のためのキメラ抗原受容体(CAR)修飾T細胞(CAR-T)に対するPP6373の使用
前記抗CD24抗体は広域スペクトルのがん細胞と反応し、キメラ抗原受容体を産生してT細胞に抗がん活性を付与するために使用され得る。一実施形態では、PP6373一本鎖Fv配列(配列番号28)又は他の抗CD24 mAb一本鎖(αCD24SC)が、図23に示されるように、当技術分野で公知のCAR-Tベクターに挿入される。続いて、構築物は、レトロウイルス、レンチウイルス、アデノ随伴ウイルス、又はアデノウイルスベクターに由来するものを含む、当技術分野で公知の遺伝子ベクターに挿入される。
CD24はがん種の複数の系統間で広く発現している。図26に示すように、CD24 CAR-Tは、肺がん、乳がん、前立腺がん、子宮頸がん、神経芽細胞腫、及び神経膠腫など、多くのがん種に対して幅広い細胞傷害性を示す。
がん治療のためのPP6373のヒト化
pdb4PB0の構造をモデル構造として用いて、PP6373 Fvホモロジーモデルを構築した。VH及びVLの両方が90%を超える4PB0との相同性を共有している。ヒトIgデータベースの検索で、ヒト生殖細胞系V領域配列IGHV3-73*01及びJ領域配列IGHJ4*01が適切な構造として特定され、重鎖のCDR領域(Onc-1 VH)のヒトアクセプターフレームワークとして使用された。ヒト生殖細胞系V領域IGKV2-29*02及びJ領域配列IGKJ4*01は、軽鎖(Onc-1 VL)のCDR領域のヒトアクセプターフレームワークとして適用された。4つのVH配列及び4つのVL配列を設計した(配列番号29~36)。新たな産物は、ヒト化スコアをVHにおいて73%から83%超に、VLにおいて80%から83%超に改善する。PP6373マウスFvの構造アラインメント及びヒト化バージョンのPP6373のFv(hu-VHv1VLv1、配列番号29及び33)は、高度の類似性を示した(図27)。
糖鎖で遮蔽されているエピトープを有する抗CD24抗体は、CD24を高発現する正常細胞には結合しない
抗体に基づく免疫治療剤の重要な要件は、正常組織に対する反応性が最小限であることである。CD24は造血細胞、特に顆粒球、B細胞、赤血球の一部、単球の一部に豊富に発現しているため、PP6373並びにその2つのヒト化クローンH2L3及びH3L3を従来の抗CD24 mAbであるML5と比較した。図33に示すように、ML5は通常高レベルのCD24を発現する細胞に強い結合を示すが、H2L3及びH3L3はB細胞や赤血球には結合せず、顆粒球にはほとんど結合しない。この結果は、マクロファージ及び非Bリンパ球の一部などの他の細胞種への結合が最小限であることを示している。 本発明の例示的な態様を以下に記載する。
<1>
非がん性細胞上では糖鎖で遮蔽されている(glycan-shielded)ががん細胞上では露出するエピトープに結合する抗体を含む、組成物。
<2>
前記抗体がCD24に結合する、<1>に記載の組成物。
<3>
前記抗体が、配列番号48に示される配列を含むペプチドに結合する、<1>に記載の組成物。
<4>
前記抗体が、配列番号1に示される配列を含む重鎖可変領域及び配列番号2に示される配列を含む軽鎖可変領域を含む、<1>に記載の組成物。
<5>
前記抗体が、配列番号3~配列番号10のいずれか1つに示される配列を含む重鎖可変領域及び配列番号11~配列番号16のいずれか1つに示される配列を含む軽鎖可変領域を含む、<1>に記載の組成物。
<6>
前記抗体が、配列番号6に示される配列を含む重鎖可変領域及び配列番号16に示される配列を含む軽鎖可変領域を含む、<5>に記載の組成物。
<7>
前記抗体が、配列番号29~配列番号32のいずれか1つに示される配列を含む重鎖可変領域及び配列番号33~配列番号36のいずれか1つに示される配列を含む軽鎖可変領域を含む、<1>に記載の組成物。
<8>
前記抗体が、配列番号30に示される配列を含む重鎖可変領域及び配列番号35に示される配列を含む軽鎖可変領域を含む、<7>に記載の組成物。
<9>
前記抗体が、配列番号31に示される配列を含む重鎖可変領域及び配列番号35に示される配列を含む軽鎖可変領域を含む、<7>に記載の組成物。
<10>
<1>~<9>のいずれか一つに記載の組成物を含む第1の抗体ドメイン及び第2の抗体又はその抗原結合断片を含む第2の抗体ドメインを含む、二重特異性抗体。
<11>
前記第2の抗体ドメインががん免疫療法のために免疫エフェクターT細胞を前記がん細胞に引き付ける、<10>に記載の二重特異性抗体。
<12>
前記第2の抗体又はその抗原結合断片がCD3に結合する、<10>に記載の二重特異性抗体。
<13>
配列番号17に示される配列及び配列番号18に示される配列を含む、<10>に記載の二重特異性抗体。
<14>
配列番号23~配列番号27及び配列番号37~配列番号41のいずれか1つに示される配列を含む、<10>に記載の二重特異性抗体。
<15>
前記第2の抗体又はその抗原結合断片がTCR-α鎖、TCR-β鎖、TCR-γ鎖又はTCR-δ鎖に結合する、<10>に記載の二重特異性抗体。
<16>
抗体介在性細胞傷害(ADCC)活性を有する、<1>~<15>のいずれか一つに記載の抗体又は二重特異性抗体。
<17>
増強されたADCC活性を有するように設計されている、<16>に記載の抗体又は二重特異性抗体。
<18>
抗体介在性細胞貪食(ADCP)活性を有する、<1>~<17>のいずれか一つに記載の抗体又は二重特異性抗体。
<19>
増強されたADCP活性を有するように設計されている、<18>に記載の抗体又は二重特異性抗体。
<20>
<4>~<9>のいずれか一つに記載の組成物を含む一本鎖抗体を含む、キメラ抗原受容体。
<21>
配列番号28に示される配列を含む、<20>に記載のキメラ抗原受容体。
<22>
<1>~<21>のいずれか一つに記載の抗体、二重特異性抗体又はキメラ抗原受容体及び第二の抗がん治療剤を含む、組成物。
<23>
<1>~<22>のいずれか一つに記載の抗体、二重特異性抗体、キメラ抗原受容体又は組成物を、がん処置を必要としている患者に投与することを含む、前記患者におけるがんを処置する方法。
<24>
前記がんが肺がん、卵巣がん、乳がん、肝臓がん、脳がん、子宮頸がん、腎がん、精巣がん、前立腺がん又は神経芽細胞腫である、<23>に記載の方法。
<25>
抗CD24抗体又はCD24に結合する受容体を発現する細胞を含む治療に関連する有害作用を処置する必要がある患者に、配列番号48に示される配列を含む組成物を投与することを含む、前記患者における前記有害作用を処置する方法。
<26>
がんを処置又は予防(prophylaxis)する必要がある患者に、配列番号48を含む組成物を投与することを含む、前記患者におけるがんを処置又は予防する方法。
<27>
<1>に記載の抗体の使用を含む、悪性組織又は転移性病変を診断する方法。
<28>
<1>に記載の抗体の使用を含む、循環がん細胞を識別する方法。
<29>
がんを処置するための薬剤の製造における、<1>~<22>のいずれか一つに記載の抗体、二重特異性抗体、キメラ抗原受容体又は組成物の使用。
<30>
前記がんが肺がん、卵巣がん、乳がん、肝臓がん、脳がん、子宮頸がん、卵巣がん、腎がん、精巣がん、前立腺がん又は神経芽細胞腫である、<29>に記載の方法。
<31>
抗CD24抗体又はCD24に結合する受容体を発現する細胞の治療的使用に関連する有害作用を処置するための薬剤の製造における、配列番号48に示される配列を含む組成物の使用。
<32>
がんを処置又は予防するための薬剤の製造における、配列番号48を含む組成物の使用。
Claims (16)
- (a)配列番号31又は配列番号30に示される配列を含む重鎖可変領域及び配列番号35に示される配列を含む軽鎖可変領域;又は
(b)配列番号6に示される配列を含む重鎖可変領域及び配列番号16に示される配列を含む軽鎖可変領域
を含む抗CD24抗体。 - 一本鎖抗体である、請求項1に記載の抗CD24抗体。
- 前記重鎖可変領域が配列番号31に示される配列を含み、前記軽鎖可変領域が配列番号35に示される配列を含む、請求項1又は請求項2に記載の抗CD24抗体。
- 前記重鎖可変領域が配列番号30に示される配列を含み、前記軽鎖可変領域が配列番号35に示される配列を含む、請求項1又は請求項2に記載の抗CD24抗体。
- 前記重鎖可変領域が配列番号6に示される配列を含み、前記軽鎖可変領域が配列番号16に示される配列を含む、請求項1又は請求項2に記載の抗CD24抗体。
- 請求項1~請求項5のいずれか一項に記載の抗CD24抗体を含む第1の抗体ドメイン及び第2の抗体又はその抗原結合断片を含む第2の抗体ドメインを含む、二重特異性抗体。
- 前記第2の抗体ドメインががん免疫療法のために免疫エフェクターT細胞をがん細胞に引き付ける、及び/又は
前記第2の抗体ドメインがCD3、TCR-α鎖、TCR-β鎖、TCR-γ鎖又はTCR-δ鎖に結合する、請求項6に記載の二重特異性抗体。 - 前記第2の抗体ドメインがCD3に結合する、請求項7に記載の二重特異性抗体。
- 前記第2の抗体ドメインが配列番号18に示される配列を含む、請求項8に記載の二重特異性抗体。
- 抗体介在性細胞傷害(ADCC)活性又は抗体介在性細胞貪食(ADCP)活性を有する、請求項1~請求項9のいずれか一項に記載の抗体又は二重特異性抗体。
- 請求項1~請求項5のいずれか一項に記載の抗CD24抗体を含む一本鎖抗体を含む、キメラ抗原受容体。
- 細胞傷害性薬、タンパク質毒素、及び放射性核種からなる群より選択されるエフェクター部分に結合している請求項1~請求項5のいずれか一項に記載の抗CD24抗体を含む、抗体薬物複合体。
- 請求項1~請求項12のいずれか一項に記載の抗体、二重特異性抗体、キメラ抗原受容体、又は抗体薬物複合体及び第二の抗がん治療剤を含む、組成物。
- 前記第二の抗がん治療剤が抗PD-1抗体、抗CTLA-4抗体又はLAG3を含む、請求項13に記載の組成物。
- 請求項1~請求項14のいずれか一項に記載の抗体、二重特異性抗体、キメラ抗原受容体、抗体薬物複合体、又は組成物を含む、がんの処置に使用するための医薬組成物。
- 前記がんが肺がん、卵巣がん、乳がん、肝臓がん、脳がん、子宮頸がん、腎がん、精巣がん、前立腺がん又は神経芽細胞腫である、請求項15に記載の医薬組成物。
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KR20210008487A (ko) | 2021-01-22 |
CN116589582A (zh) | 2023-08-15 |
BR112020022482A2 (pt) | 2021-02-09 |
US20210214458A1 (en) | 2021-07-15 |
JP2021526509A (ja) | 2021-10-07 |
SG11202010589YA (en) | 2020-11-27 |
JP2023123502A (ja) | 2023-09-05 |
MX2020012091A (es) | 2021-04-28 |
CA3099554A1 (en) | 2019-11-21 |
AU2019269361A1 (en) | 2020-11-19 |
TW202012434A (zh) | 2020-04-01 |
EA202092306A1 (ru) | 2021-02-19 |
CN112424441B (zh) | 2023-05-09 |
TWI835794B (zh) | 2024-03-21 |
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