JP5791512B2 - 組織因子経路阻害因子(tfpi)に対する抗体 - Google Patents
組織因子経路阻害因子(tfpi)に対する抗体 Download PDFInfo
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- C07K2317/565—Complementarity determining region [CDR]
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Description
配列番号1は、ヒトTFPI1のアミノ酸配列を示す。
配列番号2から4は、TFPI-3F18A4B1モノクローナル抗体の軽鎖可変ドメイン(VL)の、(コードおよび相補)ポリヌクレオチド、ならびにポリペプチド配列を示す。
配列番号5から7は、TFPI-3F18A4B1モノクローナル抗体の重鎖可変ドメイン(VH)の、(コードおよび相補)ポリヌクレオチド、ならびにポリペプチド配列を示す。
配列番号8は、重鎖可変ドメイン増幅のために使用したリバースプライマーの配列を示し、配列番号9は軽鎖増幅のために使用したリバースプライマーの配列を示す。
本発明は、TFPIに結合する抗体に関する。前記抗体は、好ましくは特異的にTFPIに結合する、すなわち、前記抗体はTFPIに結合するが、他の分子には結合しない、または、低い親和性で結合する。特に、本発明は、TFPIに結合し、かつ、TFPIの活性を調節する抗体に関する。したがって、本発明による抗体は、凝固時間を短くする能力を持ちうる。例えば、本発明の抗体は、ヒトF VIII欠損血漿において凝固時間を短くする、または、ヒト全血のトロンボエラストグラフィー(TEG)解析による凝固時間を減少させる能力を持ちうる。また、本発明はこのような抗体の使用、例えば治療的および医薬的使用に関する。
不死化した細胞と融合した、ヒト重鎖トランスジーンおよび軽鎖トランスジーンを含むゲノムを持つトランスジェニック非ヒト動物、例えば、トランスジェニックマウスから得られた、B細胞を含む、ハイブリドーマから作製しうる。
マルチプル・アライメント パラメーター―Matrix: PAM、Gap open penalty: 10.00、% identity for delay: 30、Penalize end gaps: on、Gap separation distance: 0、Negative matrix: no、Gap extension penalty: 0.20、 Residue-specific gap penalties、Hydrophilic gap penalties: on、Hydrophilic residues: GPSNDQEKR。
特定の残基における配列同一性は、簡単に誘導体化される、同一の残基を含むことを意図される。
(a)配列番号3の軽鎖可変領域アミノ酸配列、
(b)TFPIに特異的に結合する能力を保持する、(a)の少なくとも7アミノ酸のフラグメント、または、
(c)(a)の配列に対して、少なくとも70%のアミノ酸配列同一性を持つ(a)のバリアントであって、TFPIに特異的に結合する能力を保持している、(a)のバリアント、
を含みうる。
(a)配列番号6の重鎖可変領域アミノ酸配列、
(b)TFPIに特異的に結合する能力を保持する、(a)の少なくとも7アミノ酸のフラグメント、または、
(c)(a)の配列に対して、少なくとも70%のアミノ酸配列同一性を持つ(a)のバリアントであって、TFPIに特異的に結合する能力を保持している、(a)のバリアント、
を含みうる。
(a)配列番号3の軽鎖可変領域、および、配列番号6の重鎖可変領域、
(b)重鎖および軽鎖配列の一つまたは両方が、(a)に規定されている配列の少なくとも7アミノ酸のフラグメントを含むように改変されている、(a)のバリアント、または、
(c)重鎖および軽鎖配列の一つまたは両方が、(a)または(b)の配列に対して少なくとも70%アミノ酸配列同一性を持つように改変されている、(a)または(b)のいずれかのバリアント、
を含みうる抗体であって、TFPIに特異的に結合する能力を保持する。また、抗体は、本願明細書に記載の本発明の抗体の、一つまたは複数の付加的な機能または活性、例えば、場合によっては血小板数の減少を導くことなく、TFPIを阻害する能力、または凝固時間を短縮する能力を保持しうる。
状態、または一つもしくは複数の症状の治癒、軽減、または部分的な抑止に十分な量で、投与される。このような治療的処置は病気の症状の重症度の減少、または症状がない時間の頻度もしくは持続の増加をもたらす。これを達成するのに適した量は「治療に効果的な量」として定義される。例えば、治療が、不要な出血のためである場合、治療を、出血量の減少、または完全に出血を止める適切な凝血として定義しうる。
<要約>
モノクローナル抗体を組織因子経路阻害因子(TFPI)に対して作製した。望ましい結合特異性を持つモノクローナル抗体を同定し、クローニングし、配列決定した。前記抗体はin vivoにおける角質出血時間を著しく減少させるが、血小板数の著しい減少を導かないことが発見された。
全てのキットを製造者の使用説明書に従って使用した。略語:HC: 重鎖(heavy chain)、LC: 軽鎖(light chain)、VH: 可変ドメイン―重鎖(variable domain-heavy chain)、VL: 可変ドメイン―軽鎖(variable domain-light chain)、PCR: ポリメラーゼ連鎖反応(polymerase chain reaction)。
マウスを、全長TFPIおよび、最初の2つのKunitzドメインのみを含む、短縮型TFPIB161Bの両方を用いて免疫化した。RBFマウスを免疫化およびマウスモノクローナル抗体作製に使用した。注射をマウスの背中の皮下に行った。20 μgタンパク質を、最初の注射のために、完全フロイントアジェバントと混合した。次の免疫化において、不完全フロイントアジェバントを同濃度の抗原と使用した。最後の免疫化の後10日目、マウス由来の眼の血液を、TFPI特異的抗体について、ELISAによってスクリーニングを行った。陽性の血清力価を伴うマウスを10 μgのTFPIを用いて、静脈内の注射によって追加免疫し、3日後に解剖した。脾臓を無菌的に取り出し、単細胞の懸濁液へ分散させた。脾臓細胞と骨髄腫細胞との融合を、PEG法または、電気融合によって行った。
イムノプレート(immunoplate)を、抗マウスIgGでコーティングした。ハイブリドーマ細胞由来の培養上清をプレートに加え、洗浄後、可溶性ビオチン化ヒトTFPI、またはTFPIB161Bを、特異的結合に関して試験するために、加えた。
F Xa阻害アッセイ:F Xaの90%阻害を引き起こす、固定された濃度のTFPIを、抗TFPIモノクローナル抗体を含んだハイブリドーマ細胞由来の培養上清とプレインキュベートし、F Xaに加えてF Xa特異的発色基質を加えた。このアッセイは、TFPIのF Xaへの結合(K2ドメイン)に対応する。
希釈プロトロンビン(PT)解析:希釈したヒトトロンボプラスチン(TFソース)と組み合わせたヒト血漿。血漿の凝固時間を、濃度を増加させたプロテインAで精製したTFPIモノクローナル抗体を添加して測定し、凝固時間の用量依存的減少について探索した。F VIIa(25 nM)はポジティブコントロールであり、前記凝固時間を短くする。
結合相互作用解析を、Biacore 3000における表面プラズモン共鳴により行った。固定した濃度の関連するモノクローナル抗体のキャプチャーを、固定化したマウス抗IgGで得た。異なる濃度のTFPIをテストした。結合定数(Kon、Koff、KD)の決定を、TFPIおよび対象とする抗体との相互作用を1:1と仮定して、得た。
全血における、血塊形成および線溶の動態の記録。血友病Aのような状態を、中和抗F VIII IgGを用いて血液をプレインキュベートすることにより誘導する。
ウサギを、2000 RBU/kgの、抗F VIIIモノクローナル抗体の静脈注射による投与によって、一過的な血友病にした。10分後、ウサギに、12000 U/kgの、抗TFPI抗体(3F18、1.93 mg/kg)を投与した。角質出血時間は、抗F VIII抗体投与後45分間誘導された。
抗TFPI抗体に関する、マウスの重鎖および軽鎖の配列をハイブリドーマからクローニングした:TFPI-3F18A4B1(本願明細書においては3F18と略した)。QiagenのRNeasy-Mini Kitを用いてハイブリドーマ細胞から抽出した全RNAを、cDNA合成の鋳型として使用した。cDNAを、ClontechのSMART(商標)RACE cDNA amplication kitを用いて、5’-RACE反応で合成した。引き続いて、HCおよびLC配列の標的増幅を、Phusion Hot Star polymerase(Finnzymes)および、フォワードプライマーとして、SMART(商標)RACE kitに含まれるuniversal primer mix(UPM)を用い、PCRにより行った。HC(VHドメイン)の増幅のために、以下の配列のリバースプライマー、5’-CCCTTGACCAGGCATCCCAG-3’(primer#129)を、使用した。LC増幅のために、以下の配列のリバースプライマー、5’-GCTCTAGACTAACACTCATTCCTGTTGAAGCTCTTG-3’(primer#69)を使用した。
Claims (8)
- 組織因子経路阻害因子(TFPI)に特異的に結合し、かつ、(a)ヒトF VIII欠損血漿、および/または(b)ヒト全血における、凝固時間を減少させる抗体であって、
(a)配列番号3のアミノ酸24から39、
(b)配列番号3のアミノ酸55から61、
(c)配列番号3のアミノ酸94から102、
(d)配列番号6のアミノ酸31から35、
(e)配列番号6のアミノ酸50から65、および
(f)配列番号6のアミノ酸98から107、
を含む抗体。 - 配列番号3の軽鎖可変領域、および、配列番号6の重鎖可変領域を含む、請求項1に記載の抗体。
- 血小板レベルの著しい減少なしに、in vivoにおける凝固時間を減少させる、請求項1または2に記載の抗体。
- モノクローナル抗体である、請求項1または2に記載の抗体。
- 請求項1または2に記載の抗体をコードするポリヌクレオチド。
- 配列番号2および5から選択される配列を含む、請求項5に記載のポリヌクレオチド。
- 請求項1から4のいずれか一項に記載の抗体、または、請求項5もしくは6に記載のポリヌクレオチド、および、医薬的に許容可能なキャリアーまたは希釈剤を含む、医薬組成物。
- (a)出血性疾患の治療もしくは予防用の、または、(b)血液凝固の刺激用の、請求項7に記載の医薬組成物。
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US (2) | US8618263B2 (ja) |
EP (1) | EP2379599B1 (ja) |
JP (1) | JP5791512B2 (ja) |
CN (1) | CN102300876A (ja) |
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WO (1) | WO2010072687A1 (ja) |
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PL2379600T5 (pl) * | 2008-12-22 | 2021-03-08 | Novo Nordisk A/S | Przeciwciała przeciwko inhibitorowi szlaku czynnika tkankowego |
EP2542257B1 (en) | 2010-03-01 | 2017-07-05 | Bayer Healthcare LLC | Optimized monoclonal antibodies against tissue factor pathway inhibitor (tfpi) |
CN103080135B (zh) * | 2010-06-30 | 2017-06-13 | 诺沃—诺迪斯克有限公司 | 能够特异性结合组织因子途径抑制剂的抗体 |
US9228022B2 (en) | 2010-06-30 | 2016-01-05 | Novo Nordisk A/S | Antibodies that are capable of specifically binding tissue factor pathway inhibitor |
US9896513B2 (en) | 2013-03-15 | 2018-02-20 | Novo Nordisk A/S | Antibodies capable of specifically binding two epitopes on tissue factor pathway inhibitor |
WO2014210546A1 (en) | 2013-06-27 | 2014-12-31 | University Of Washington Through Its Center For Commercialization | Biocompatible polymeric system for targeted treatment of thrombotic and hemostatic disorders |
CN105473619B (zh) | 2013-07-19 | 2020-12-15 | 诺和诺德股份有限公司 | 能够引起促凝血活性的识别组织因子途径抑制剂的n-末端部分的抗体 |
CN106687482B (zh) * | 2014-09-17 | 2022-01-25 | 诺和诺德股份有限公司 | 能够结合组织因子途径抑制剂(1-161)上的两个表位的抗体 |
WO2016137108A1 (en) * | 2015-02-25 | 2016-09-01 | Mogam Biotechnology Institute | Novel antibody binding to tfpi and composition comprising the same |
MY195443A (en) | 2015-08-19 | 2023-01-21 | Pfizer | Tissue Factor Pathway Inhibitor Antibodies and uses Thereof |
WO2020075083A1 (en) | 2018-10-11 | 2020-04-16 | Pfizer Inc. | Dosage regimen for tfpi antagonists |
CN112442127A (zh) * | 2019-08-29 | 2021-03-05 | 苏州康宁杰瑞生物科技有限公司 | 针对tfpi的单克隆抗体 |
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EP0539975A1 (en) | 1991-10-31 | 1993-05-05 | Teijin Limited | Method for immunological assay of free lipoprotein-associated coagulation inhibitor (LACI) and kit therefor |
JPH0875736A (ja) | 1994-09-06 | 1996-03-22 | Chemo Sero Therapeut Res Inst | ヒト組織因子凝固系インヒビターの定量法 |
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CN102300876A (zh) | 2011-12-28 |
WO2010072687A1 (en) | 2010-07-01 |
EP2379599A1 (en) | 2011-10-26 |
EP2379599B1 (en) | 2015-09-02 |
US20130344090A1 (en) | 2013-12-26 |
JP2012513193A (ja) | 2012-06-14 |
US20110268745A1 (en) | 2011-11-03 |
TW201026329A (en) | 2010-07-16 |
US8618263B2 (en) | 2013-12-31 |
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