JP7283806B2 - 抗pd-l1/vegf二機能性抗体およびその用途 - Google Patents
抗pd-l1/vegf二機能性抗体およびその用途 Download PDFInfo
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Description
本発明の第1の態様は、二機能性抗体を提供し、前記二機能性抗体は、
(a)抗PD-L1の抗体またはエレメント、および
(b)前記抗PD-L1の抗体またはエレメントに連結する抗VEGFの抗体またはエレメントを含む。
Dは、それぞれ独立して、存在しないか、または抗VEGFの抗体またはエレメントであり、且少なくとも一つのDは、抗VEGFの抗体またはエレメントであり、
L1、L2、L3、L4、L5およびL6は、それぞれ独立して、結合またはリンカーエレメントであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合または共有結合を表し、
「-」は、ペプチド結合を表し、
ここで、前記二機能性抗体は、PD-L1に結合する同時にVEGFに結合する活性を有する。
SEQ ID NO:3に示されるCDR1、
SEQ ID NO:4に示されるCDR2、および
SEQ ID NO:5に示されるCDR3の三つの相補性決定領域CDRを含み、および/または
前記抗PD-L1抗体の軽鎖可変領域(VL)は、
SEQ ID NO:6に示されるCDR1’、
アミノ酸配列がGISであるCDR2’、および
SEQ ID NO:7に示されるCDR3’の三つの相補性決定領域CDRを含む。
Dは、抗VEGFのエレメントであり、
L1は、存在しないかまたはリンカーエレメントであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合を表し、
「-」は、ペプチド結合を表し、
ここで、前記二機能性抗体は、PD-L1に結合する同時にVEGFに結合する活性を有する。
(ii)段階(i)で得られた混合物を精製および/または単離することにより、本発明の第1の態様に記載の二機能性抗体を得る段階とを含む。
(I)本発明の第1の態様に記載の二機能性抗体、および
(II)薬学的に許容されるベクターを含む。
(a)本発明の第1の態様に記載の二機能性抗体、および
(b)検出可能なマーカー、薬物、毒素、サイトカイン、放射性核種、酵素、またはそれらの組み合わせからなる群から選択されるカップリング部分を含む。
前記VLは、SEQ ID NO:6に示されるCDR1’、アミノ酸配列がGISであるCDR2’およびSEQ ID NO:7に示されるCDR3’を含む。
本発明をより容易に理解するために、特定の技術的および科学的用語を以下に具体的に定義する。本明細書で明確に定義されない限り、本明細書で使用される他のすべての技術的および科学的用語は、本発明が属する当業者によって一般的に理解される意味を有する。
プログラム細胞死タンパク質-1(programmed cell death protein、PD-1)は、近年発見された負の共刺激分子であり、CD28免疫グロブリンスーパーファミリーである。PD-1は、通常、活性化T細胞、B細胞および骨髄細胞で発現し、プログラム細胞死リガンド-1(programmed death ligand 1、PD-L1)およびPD-L2の二つの天然リガンドを有し、どちらもB7スーパーファミリーに属し、抗原提示細胞中で発現し、PD-L1は、様々な組織でも発現する。ここで、PD-L1は、PD-1の重要な負の免疫調節因子であり、B7-H1とも呼ばれ、PD-1との結合は、T細胞活性化の共阻害シグナルを媒介し、T細胞活性化および増殖を阻害し、CTLA-4と同様に負の調節効果を果たし、T細胞のアポトーシスを誘導することができる。それに、研究報告によると、腫瘍のマイクロ環境も、免疫細胞の破壊から腫瘍細胞を保護することができるため、腫瘍細胞を認識することができず、免疫回避現象が発生する。それに、腫瘍のマイクロ環境は、PD-L1持続的に発現し、腫瘍患者の免疫機能を極端に低下させる。
QVQLQQSGAELVKPGASVKLSCKASGYAFTGYTIHWVKQRSGLGLEWLGWFYPGSGTLKYNEKFKDKATLTADKSSSTVYLELSRLTSEDSAVYFCARHGTGTLMAMDYWGQGTSVTVSS (SEQ ID NO:1)
QVQLVQSGAEVKKPGASVKVSCKASGYAFTGYTIHWVRQAPGQRLEWMGWFYPGSGTLKYSEKFQGRVTITRDKSLSTAYMELSSLRSEDTAVYYCARHGTGTLMAMDYWGQGTLVTVSS (SEQ ID NO:8)
DVVVTQTPLSLPVSFGDQVSISCRSSQSLANSYGNTYLSWYLHKPGQSPQLLIYGISNRFSGVPDRFSGSGSGTDFTLKISTIKPEDLGMYYCLQGTHQPPTFGGGTKLEIK (SEQ ID NO:2)
DVVMTQTPLSLSVTPGQPASISCKSSQSLANSYGNTYLSWYLHKPGQSPQLLIYGISNRFSGVPDRFSGSGSGTDFTLKISRVEAEDVGVYYCLQGTHQPPTFGQGTKLEIK (SEQ ID NO:9)
血管内皮増殖因子(vascular endothelial growth factor)は、VEGFとも呼ばれる。VEGFタンパク質は、1989年に米国の二つのバイオテクノロジー企業の科学者によってそれぞれ精製および同定され、その遺伝子配列をクローンおよび測定し、VPFとVEGFとは、同じ遺伝子によってをコードされる同じタンパク質であることを証明した。VEGFは、VEGF-A、-B、-C、-Dおよび-Eの六つのアイソフォーム(isoforms)を有し、その分子量は、35~44kDaの範囲であり、各アイソフォームは、三つの「血管内皮増殖因子受容体」(VEGFR-1、-2および-3)の特定の組み合わせに特異的に結合する。しかし、研究によると、これらの受容体は、VEGFファミリー分子の親和力と異なり、ここで、VEGFR1は、VEGFファミリーとの親和力が比較的に高いことを示した。
SDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNT (SEQ ID NO:10)
二重特異性抗体(Bispecific Antibody、bsAb)は、二つの異なる抗原またはタンパク質を同時に標的とし、二つの異なるシグナル伝達経路を遮断し、特異的免疫応答を刺激することができる非天然抗体であり、その特異性および二機能性は、腫瘍免疫治療においてますます重要な役割を果たし、今は世界の腫瘍の抗体工学治療における研究のホットスポットになっている。研究によると、二重特異性抗体は、主に腫瘍免疫治療における免疫細胞による腫瘍の死滅を仲介し、二重標的と結合し、二重シグナル伝達経路を遮断し、独特の機能または重複した機能を発揮して、耐性を効果的に防ぐことができ、強い特異性および標的性を有し、脱標的毒性を低下させ、治療原価を効果的に低減する等の利点(抗体サークルを参照)を有するため、二重特異性抗体薬を使用すると、腫瘍細胞が逃げる可能性を減らし、腫瘍細胞を排除し、治療効果を向上させることができる。
(a)抗PD-L1の抗体またはエレメント、および
(b)前記抗PD-L1の抗体またはエレメントに連結する抗VEGFの抗体またはエレメントを含む。
Dは、それぞれ独立して、存在しないか、または抗VEGFの抗体またはエレメントであり、且少なくとも一つのDは、抗VEGFの抗体またはエレメントであり、
L1、L2、L3、L4、L5およびL6は、それぞれ独立して、結合またはリンカーエレメントであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合または共有結合を表し、
「-」は、ペプチド結合を表し、
ここで、前記二機能性抗体は、PD-L1に結合する同時にVEGFに結合する活性を有する。
Dは、抗VEGFのエレメント(VEGR1D2)であり、
L1は、存在しないかまたはリンカーエレメントであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合を表し、
「-」は、ペプチド結合を表し、
ここで、前記二機能性抗体は、PD-L1に結合する同時にVEGFに結合する活性を有する。
H鎖:(重鎖可変領域でのVEGR1D2のアミノ酸配列)
SDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNTGGSGGSGGSGGSGGSQVQLVQSGAEVKKPGASVKVSCKASGYAFTGYTIHWVRQAPGQRLEWMGWFYPGSGTLKYSEKFQGRVTITRDKSLSTAYMELSSLRSEDTAVYYCARHGTGTLMAMDYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSCDKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSREEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPG (SEQ ID NO:11)
H鎖:(重鎖定常領域でのVEGR1D2のアミノ酸配列)
QVQLVQSGAEVKKPGASVKVSCKASGYAFTGYTIHWVRQAPGQRLEWMGWFYPGSGTLKYSEKFQGRVTITRDKSLSTAYMELSSLRSEDTAVYYCARHGTGTLMAMDYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSCDKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSREEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGGGSGGSGGSGGSGGSSDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNT (SEQ ID NO:12)
L鎖:
DVVMTQTPLSLSVTPGQPASISCKSSQSLANSYGNTYLSWYLHKPGQSPQLLIYGISNRFSGVPDRFSGSGSGTDFTLKISRVEAEDVGVYYCLQGTHQPPTFGQGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC (SEQ ID NO:13)
本発明は、前記抗体またはそのフラグメントまたはその融合タンパク質をコードするポリヌクレオチド分子をさらに提供する。本発明のポリヌクレオチドは、DNA形態またはRNA形態であり得る。DNA形態は、cDNA、ゲノムDNAまたは合成DNAを含む。DNAは、一本鎖または二本鎖であり得る。DNAは、コード鎖または非コード鎖であり得る。本発明の成熟ポリペプチドをコードするポリヌクレオチドは、成熟ポリペプチドのみをコードするコード配列、成熟ポリペプチドのコード配列および様々な追加のコード配列、成熟ポリペプチドのコード配列(および任意の追加のコード配列)および非コード配列を含む。
本発明は、組成物をさらに提供する。好ましくは、前記組成物は、本発明の前記二重特異性抗体またはその活性フラグメントまたはその融合タンパク質および薬学的に許容されるベクターを含む医薬組成物である。一般に、これらの物質を、毒性がなく、不活性で、薬学的に許容される水性ベクター媒体で処方することができ、ここで、pHは、通常、約5~8、好ましくは、約6~8であり、pH値は、処方される物質の性質および治療される病症によって異なる。処方された医薬組成物は、従来の経路で投与されることができ、ここで、静脈内注射、静脈内点滴、皮下注射、局所注射、筋肉内注射、腫瘍内注射、腹腔内注射(腹膜内等)、頭蓋内注射、または腔内注射をふくむが、これらに限定されない。
1.本発明の二機能性抗体は、PD-L1とVEGFとに同時に結合することができ、二機能性抗体および結合標的の結合構成を不変に保つことができ、分子は、安定している。
2.本発明の二重特異性抗体HB0025は、組換えヒトPD-L1および組換えヒトVEGF165に特異的に結合(KDは、10-5M未満)することができ、非標的分子との非特異的な静電的および疎水性結合効果を有さなく、最初の培養条件において、二重特異性抗体の発現レベルは、3.9g/Lに達し、純度は、97%以上である。
3.本発明の二機能性抗体は、結合標的に対する高い結合親和力、良好な遮断活性を有し、特定の二重標的相乗効果を示し、腫瘍細胞(特に、PD-L1およびVEGFを高発現する腫瘍)を効果的に死滅することにより、腫瘍体積および腫瘍を有意に減らし、癌を治療し、特に固形腫瘍を治療する。
4.単独の抗PD-L1抗体(HB0023等)および抗VEGF融合タンパク質(HB002.1T等)と比較して、本発明の二重特異性抗体は、PD-L1および/またはVEGFに対する結合活性がより高い。具体的には、本発明の二重特異性抗体のPD-L1の親和力は、約1E~10molであり、VEGF165との親和力は、約1E~11molである。
5.本発明の調製方法は、簡単で実行可能である。本発明によって申請する抗VEGF/PD-L1二重特異性抗体は、良好な適用の見通しを有する。
本発明の抗PD-L1抗体は、ヒトPD-L1-Hisタンパク質でマウスを免疫化した後、スクリーニングしてマウスモノクローナル抗体(重鎖可変領域および軽鎖可変領域配列は、それぞれSEQ ID NO:1およびSEQ ID NO:2に示される)を得た後、ヒト化して得られたヒト化モノクローナル抗体(900339)である。ここで、重鎖配列は、SEQ ID NO:8に示され、軽鎖配列は、SEQ ID NO:9に示される。人工的に合成されたVEGFR1D2 (配列は、SEQ ID NO:10に示される)は、リンカー(Linker)(GGSGGSGGSGGSGGS、SEQ ID NO:16)を介して重鎖発現ベクターの5’末端または3’末端に接続され、軽鎖ベクター(1:1)とともにCHO-S細胞に、37℃、5%CO2でコトランスフェクトされ、130rpm/minで7日間培養した後、遠心分離して上清を収集する。上清を4000rpmで10分間遠心分離し、0.45μmフィルターメンブレンでろ過して、ろ液を収集する。ろ液をプロティン(Protein)Aアフィニティーカラムで精製した後、抗体900387および900388を得、その構造マップは、図1に示される。精製されたタンパク質をSEC_UPLCによって検出され、純度は、98%を超え、SDS-PAGEによって検出され、SDS-PAGE還元または非還元電気泳動検出結果は、図2に示される。
QVQLVQSGAEVKKPGASVKVSCKASGYAFTGYTIHWVRQAPGQRLEWMGWFYPGSGTLKYSEKFQGRVTITRDKSLSTAYMELSSLRSEDTAVYYCARHGTGTLMAMDYWGQGTLVTVSS
900339-VL SEQ ID NO:9(下線は、標識された順序の軽鎖可変領域CDR1、CDR2およびCDR3のアミノ酸配列)
DVVMTQTPLSLSVTPGQPASISCKSSQSLANSYGNTYLSWYLHKPGQSPQLLIYGISNRFSGVPDRFSGSGSGTDFTLKISRVEAEDVGVYYCLQGTHQPPTFGQGTKLEIK
VEGFR1D2 SEQ ID NO:10
SDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNT
本実施例において、SPR法を使用して、抗体-抗原結合の動力学および親和力を測定する。
組換えヒトPD-L1、シノバイオロジカル(Sino Biological)、10084-H08H
組換えヒトVEGF165、シノバイオロジカル、11066-HNAH
アミノカップリングキット、GE、BR-1000-50
HBS-EP(10X)、GE、BR-1006-69
ヒト抗体キャプチャーキット(Human Antibody Captrue Kit)、GE、BR-1008-39
Sシリーズセンサーチップ(Series S Sensor Chip CM5)、GE、BR-1005-30
ビアコア(BIACORE)、GE、ビアコア 8K
本実施例において、SPR法をしようして、抗体と非標的分子との非特異的吸着効果を測定する。
卵白リゾチーム、シグマ(Sigma)、L3790
大豆膵臓阻害剤1-S型、シグマ、T-2327
アミノカップリングキット、GE、BR-1000-50
HBS-EP(10X)、GE、BR-1006-69
リゾチームのウサギポリクローナル抗体、ABcam、Ab391
抗トリプシン阻害剤抗体、ライフスパンバイオサイエンシーズ(LifeSpan Biosciences)、LS-C76609
0.85%リン酸溶液、ProteOn、176-2260
50mM水酸化物、ProteOn、176-2230
SシリーズセンサーチップCM5、GE、BR-1005-30
ビアコア、GE、ビアコア 8K
4.1.二重特異性抗体の調製
図4に示されるように、BalanA培地を使用して、特定のフィーディング(feeding)追加して培養し、そのCHO-K1細胞株は、乳酸を十分に代謝することができ、細胞増殖状態は、良好で、16日で獲得する場合、生存率は、90%を超え、温度を33℃および31℃に下げても、発現に有意な差はなく、約3g/Lであり、毎日の給餌は、細胞密度および発現レベルを大幅に増加させることができ、最重的な発現は、3.9g/Lであり、培養プロセス全体の純度は、低下せず、約97%に維持される。
HB0025のインビボでの薬効を検出する。hCD34+ヒト化マウスの右脇の下にヒト肺腺癌HCC-827細胞を接種し、腫瘍が平均約100~150mm3に成長したとき、末梢血中のhCD45+の比率および腫瘍体積に応じて、48匹の担癌マウスをランダムに六つのグループに分け、各グループの八つの動物にグループG1のPBS、グループG2のHB0023(抗PD-L1モノクローナル抗体、実施例1のヒト化モノクローナル抗体900339)1mg/kg、グループG3のHB0025 1mg/kg、グループG4のHB0025 3mg/kg、グループG5のHB0025 10mg/kgおよびグループG6のHB002.1T(抗VEGF融合タンパク質、特許番号CN103319610B)1mg/kgを尾静脉を介して投与し、2回/週、9回投与する。腫瘍体積およびマウス体重を2回/週測定した。実験中、特定のグループの動物の平均腫瘍体積が2000mm3を超えるか、または実験が終了する場合、動物を安楽死させ、腫瘍の重さを量った。
本実施例は、実施例1で調製された二重特異性抗体900388(重鎖アミノ酸配列および軽鎖アミノ酸配列は、それぞれSEQ ID NO:12およびSEQ ID NO:13に示される)に対する親和力、非標的分子との非特異性吸着効果およびインビボでの薬効を検出し、実験方法は、実施例2~4のHB0025を二重特異性抗体900388に置き換えた。
Claims (14)
- (a)抗PD-L1抗体;および
(b)前記抗PD-L1抗体に連結する抗VEGF抗体またはエレメントであって、抗VEGFエレメントがVEGF受容体の細胞外領域である、抗VEGF抗体またはエレメント;
を含み、
前記抗PD-L1抗体の重鎖可変領域(VH)が以下の三つの相補性決定領域(すなわちHCDR):
SEQ ID NO:3に示されるHCDR1、
SEQ ID NO:4に示されるHCDR2、および
SEQ ID NO:5に示されるHCDR3
を含み、
前記抗PD-L1抗体の軽鎖可変領域(VL)が以下の三つの相補性決定領域(すなわちLCDR):
SEQ ID NO:6に示されるLCDR1、
アミノ酸配列がGISであるLCDR2、および
SEQ ID NO:7に示されるLCDR3
を含む二機能性抗体であって、
二機能性抗体は、式Iに示されるN末端からC末端までの構造を有し、
Dは、それぞれ独立して、存在しないか、または抗VEGF抗体もしくはエレメントであり、少なくとも一つのDは、抗VEGF抗体またはエレメントであり、
L1、L2、L3、L4、L5およびL6は、それぞれ独立して、結合またはリンカーであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合または共有結合を表し、
「-」は、ペプチド結合を表し、
二機能性抗体は、PD-L1およびVEGFに同時に結合する活性を有する、
、二機能性抗体。 - 前記抗PD-L1抗体の重鎖可変領域(VH)は、SEQ ID NO:1に示されるアミノ酸配列を有し、および前記抗PD-L1抗体の軽鎖可変領域(VL)は、SEQ ID NO:2に示されるアミノ酸配列を有する;あるいは
前記抗PD-L1抗体の重鎖可変領域(VH)は、SEQ ID NO:8に示されるアミノ酸配列を有し、および前記抗PD-L1抗体の軽鎖可変領域(VL)は、SEQ ID NO:9に示されるアミノ酸配列を有する、
請求項1に記載の二機能性抗体。 - 前記抗VEGFエレメントが、血管内皮細胞増殖因子受容体1(VEGFR1)の第2の細胞外領域D2(VEGFR1D2)を含む、請求項1に記載の二機能性抗体。
- 前記二機能性抗体は、抗PD-L1抗体およびVEGFR1D2との融合によって形成され、対称な二つのペアのペプチド鎖を有し、各ペアのペプチド鎖は式IaまたはIbに示されるN末端からC末端までの構造を有し、
Dは、抗VEGFエレメントであり、
L3またはL5は、独立して、存在しないかまたはリンカーであり、
VLは、抗PD-L1抗体の軽鎖可変領域を表し、
CLは、抗PD-L1抗体の軽鎖定常領域を表し、
VHは、抗PD-L1抗体の重鎖可変領域を表し、
CHは、抗PD-L1抗体の重鎖定常領域を表し、
「~」は、ジスルフィド結合を表し、
「-」は、ペプチド結合を表す、
請求項1に記載の二機能性抗体。 - 前記抗VEGF抗体は、ナノ抗体、一本鎖抗体および二本鎖抗体からなる群から選択される、請求項1に記載の二機能性抗体。
- 前記二機能性抗体の重鎖はSEQ ID NO:11またはSEQ ID NO:12に示されるアミノ酸配列を有し、前記二機能性抗体の軽鎖はSEQ ID NO:13に示されるアミノ酸配列を有する、請求項1に記載の二機能性抗体。
- 請求項1に記載の二機能性抗体をコードする、単離されたポリヌクレオチド。
- 請求項7に記載のポリヌクレオチドを含む、ベクター。
- 請求項8に記載のベクターを含むか、またはゲノム中に請求項7に記載のポリヌクレオチドが組み込まれた、遺伝子操作された宿主細胞。
- (i)宿主細胞の増殖に適切な条件下で、請求項9に記載の宿主細胞を培養して、請求項1に記載の二機能性抗体を含む混合物を得る段階と、および
(ii)段階(i)で得られた混合物を精製および/または単離することにより、請求項1に記載の二機能性抗体を得る段階とを含む、
請求項1に記載の二機能性抗体を調製する方法。 - (I)請求項1に記載の二機能性抗体、および
(II)薬学的に許容される担体を含む、医薬組成物。 - (a)請求項1に記載の二機能性抗体、および
(b)検出可能なマーカー、薬物、サイトカイン、放射性核種、酵素、およびそれらの組み合わせからなる群から選択されるカップリング部分を含み、
前記薬物が抗腫瘍薬である、免疫コンジュゲート。 - 請求項1に記載の二機能性抗体または請求項12に記載の免疫コンジュゲートを含む、検出試薬またはキット。
- 請求項1に記載の二機能性抗体または請求項12に記載の免疫コンジュゲートを含む、癌または腫瘍を予防および/または治療するための医薬組成物。
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