JP6329516B2 - Il−17a及びil−17fに結合する抗体分子 - Google Patents
Il−17a及びil−17fに結合する抗体分子 Download PDFInfo
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Description
フェニルアラニン、チロシン及びトリプトファン(芳香族側鎖を有するアミノ酸)
リシン、アルギニン及びヒスチジン(塩基性側鎖を有するアミノ酸)
アスパラギン酸及びグルタミン酸(酸性側鎖を有するアミノ酸)
アスパラギン及びグルタミン(アミノ側鎖を有するアミノ酸)及び
システイン及びメチオニン(硫黄含有側鎖を有するアミノ酸)
を含む。同一性又は類似性の度合は、容易に計算できる(Computational Molecular Biology、Lesk、A.M.編、Oxford University Press、New York、1988;Biocomputing.Informatics and Genome Projects、Smith,D.W.編、Academic Press、New York、1993;Computer Analysis of Sequence Data、Part1、Griffin、A.M.and Griffin,H.G.編、Humana Press、New Jersey、1994;Sequence Analysis in Molecular Biology、von Heinje、G.、Academic Press、1987;及びSequence Analysis Primer、Gribskov、M.and Devereux,J.編、M Stockton Press、New York、1991)
大腸菌株INVαF’(Invitrogen)を、形質転換及び日常の培養成長に使用した。DNAの制限酵素及び修飾酵素は、Roche Diagnostics Ltd.及びNew England Biolabsから入手した。プラスミドの調整は、マキシプラスミド(Maxi Plasmid)精製キット(QIAGEN、カタログ番号12165)を使用して実施した。DNAシークエンシング反応は、ABI Prism Big Dye terminator sequencing kit(カタログ番号4304149)を使用して実施し、ABI 3100自動シークエンサー(Applied Biosystems)で実行した。データを、プログラムAutoAssembler(Applied Biosystems)を使用して分析した。オリゴヌクレオチドは、Invitrogenから入手した。IgGの濃度は、IgG会合ELISAを使用して決定した。
組換えIL−17A及びIL−17Fは、R&D Systemsから購入した。
組換えIL−17A/Fヘテロ二量体は、GSリンカーを使用して、IL−17A及びIL−17Fを連結することによって作製した。このヘテロ二量体は、以下の配列(配列番号19)を有した。
組換えカニクイザルIL−17F(配列番号20)
カニクイザルのL−17FをコードするDNA配列は、NdeI及びXhoIの制限部位に導入されたプライマーを使用して、PCRにより増幅した。PCR産物は、pCR4Blunt−TOPO内において連結し分解及びpET43.1aのNdeI/XhoI部位への連結前に、配列を確認した。
中和抗IL−17抗体の作製
メスのSprague Dawlyラットを組換えヒトIL−17(R&D systemsから購入)を用いて免疫化した。ラットは、100μlのフロイントのアジュバント中の20μgIL−17の免疫化を4回受けた。ヒトIL−17と結合した抗体225を、WO04/051268に記載の方法を使用して単離した。抗体225の重鎖可変領域(VH)及び軽鎖可変領域(VL)に関する遺伝子を単離し、逆転写PCRを介したクローニングの後でシークエンシングした。
抗体CA028_0496はIL−17及びIL−17F及びIL−17A/Fヘテロ二量体を中和する。
ヒーラ細胞
ヒーラ細胞におけるヒト組換えIL−17A及びヒト組換えIL−17Fに対する抗体CA028_0496の能力を試験し、抗体CDP435(WO06/054059)と比較した。ヒーラ細胞は、ATCC(ATCC CCL−2)の細胞バンクから得た。細胞を、10%ウシ胎児血清、ペニシリン、ゲンタマイシン及びグルタミンを添加したダルベッコ変法イーグル培地(DMEM)で成長させた。1×104の細胞を、96ウェルの平底組織培養プレートに播種した。細胞を一晩インキュベートし、アッセイバッファーで1回洗浄した。ヒトIL−17A(25ng/ml)又はヒトIL−17F(125ng/ml)のどちらかを、固定濃度のヒトTNFαの存在下でインキュベートし、この混合物を、抗体CA028_0496又は抗体CDP435とともにプレインキュベートした。その後、サイトカインと抗体とを、一晩インキュベートしたヒーラ細胞に加えた。細胞培養の上清におけるIL−6の産生は、細胞に加えたIL−17A/IL−17Fの量と比例していた。ヒトIL−6のレベルをELISAにより測定し、ヒトIL−6の公知の標準濃度と比較することによって定量化した。
ヒトミクログリア細胞(TCS Cellworks)を、平底の96ウェルプレートに、ウェル当たり5,000細胞で、全量100μlで播種し、プラスチックへの付着のため24時間放置した。この時、ヒト組換えIL−17A、ヒト組換えIL−17F、カニクイザル組換えIL−17F及びヒト組換えIL−17A/Fヘテロ二量体の滴定(5、1、0.2及び0.04μg/ml)を、10ng/mlのヒト組換えTNFαの存在下及び不在下で、ウェルに3重に加えた。対照ウェルは、刺激を含まず、IL−17A単独(100ng/ml)、TNFα単独並びにIL−17A及びTNFαを一緒に含む。すべてのサイトカインを、全容量が110μl/ウェルで加え、ウェルの全容量を210μlにした。抗体に関する実験において、細胞を、同じ方法で播種した。24時間後、抗体及びサイトカインを同時に加え、全最終容量200μlにおいて定められた最終濃度をもたらした。
抗体CA028_0496(ヒトIgG4定常領域)のIL−17A及びIL−17Fに対する親和性
BIA(Biamolecular Interaction Analysis)を、Biacore3000(Biacore AB)を使用して実施した。すべての実験は、25℃において実施した。Affinipure Fc Fragment goat anti−human IgG,Fc fragment specific(Jackson ImmunoResearch)を、アミン結合化学反応を介して、捕捉レベルおよそ6000反応単位(RU)まで、CM5 Sensor Chipに固定した。HBS−EPバッファー(10mM HEPES pH7.4、0.15M NaCl、3mM EDTA、0.005% Surfactant P20、Biacore AB)を、流速10μl/分で、ランニングバッファーとして使用した。固定抗ヒトIgG−Fcによって捕捉するために、抗体CA028_0496(1.81mg/ml)を10μl注入した。ヒトのIL−17A及びIL−17のイソ型を、50nMからサブnMに2重に希釈した捕捉CA028_0496により、流速30μL/分で滴定した。30μLの40mM HClを注入し、その後5μLの5mM NaOHを1度注入することによって、表面を再生した。
IL−17A、カニクイザルIL−17F及びIL−17A/Fヘテロ二量体に対する、抗体CA028_0496(マウスIgG1定常領域)の親和性
BIA(Biamolecular Interaction Analysis)を、Biacore3000(Biacore AB)を使用して実施した。
すべての実験は、25℃において実施した。Affinipure F(ab’)2 fragment goat anti−mouse IgG,Fc fragment specific(Jackson ImmunoResearch)を、アミン結合化学を介して、捕捉レベルおよそ6000反応単位(RU)まで、CM5 Sensor Chip(Biacore AB)に固定した。HBS−EPバッファー(10mM HEPES pH7.4、0.15M NaCl、3mM EDTA、0.005% Surfactant P20、Biacore AB)を、流速10μl/分で、ランニングバッファーとして使用した。固定抗マウスIgG、Fcによって捕捉するために、抗体CA028_0496(4ug/mlL)を10μl注入した。ヒトIL−17A、カニクイザルIL−17F及びヘテロ二量体A/Fを、25nMからサブnMに2重に希釈した、捕捉CA028_0496により、流速30μL/分で滴定した。流速10uL/分で10μLの40mM HClを注入し、その後5μLの5mM NaOHを1度注入することによって、表面を再生した。
Claims (15)
- IL−17Fに対して、2nMより優れた結合親和性を有し、IL−17Aに対して、100pMより優れた結合親和性を有する、ヒトIL−17A及びヒトIL−17Fに結合する中和抗体であって、競合ELISA又はBIAcoreを用いて、配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体のヒトIL−17A及びヒトIL−17Fへの結合を80%超交差ブロックし、並びに/又は配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体によって、ヒトIL−17A及びヒトIL−17Fを結合することから80%超交差ブロックされ、かつ重鎖配列gH9(配列番号9)及び軽鎖配列gL7(配列番号7)を含む抗体と同じヒトIL−17A及びヒトIL−17F上にあるエピトープに結合する、上記中和抗体。
- 抗体が、抗体全体又はそれらの機能的に活性な断片又は誘導体である、請求項1に記載の抗体。
- 抗体が、モノクロナール、多価、多重特異性、ヒト化又はキメラの抗体、一本鎖抗体、Fab断片、Fab’断片、F(ab’)2断片、又はそれらのエピトープ結合断片である請求項2に記載の抗体。
- 抗体又はその断片が、CDRグラフト抗体又は完全ヒト抗体である、請求項3に記載の抗体。
- 抗体又はその断片が、1種又は複数種のエフェクター分子に結合した、請求項1から4までのいずれか一項に記載の抗体。
- 請求項1から4までのいずれか一項に記載の抗体の重鎖及び/又は軽鎖をコードする、単離DNA。
- 請求項6に記載の1種又は複数種のDNAを含む、クローニングベクター又は発現ベクター。
- 請求項7に記載の1種又は複数種のクローニングベクター又は発現ベクターを含む宿主細胞。
- 請求項8に記載の宿主細胞を培養するステップ、及び抗体を単離するステップを含む、請求項1から4までのいずれか一項に記載の抗体の作製方法。
- 請求項1から4までのいずれか一項に記載の抗体と、1種又は複数種の医薬として許容可能な賦形剤、希釈剤又は担体とを組み合わせて含む、医薬組成物。
- 他の活性成分をさらに含む、請求項10に記載の医薬組成物。
- 治療に使用するための、請求項1から4までのいずれか一項に記載の抗体、或いは請求項10又は請求項11に記載の医薬組成物。
- 病的障害が、感染(ウィルス性、細菌性、真菌性及び寄生性)、感染に伴う内毒素性ショック、関節炎、間接リウマチ、ぜんそく、骨盤内炎症性疾患、アルツハイマー病、クローン病、ペイロニー病、セリアック病、胆嚢疾患、毛巣病、腹膜炎、乾癬、血管炎、外科手術後の癒着、脳梗塞、I型糖尿病、ライム病関節炎、髄膜脳炎、多発性硬化症及びギラン・バレー症候群を含む中枢神経系及び末梢神経系の免疫介在性炎症性疾患、膵炎、外傷(外科手術)、移植片対宿主病、移植による拒絶反応、がん(メラノーマ、肝芽腫、肉腫、扁平上皮癌、移行上皮癌、卵巣癌、胃癌、及び結腸癌を含む固形腫瘍、並びに急性骨髄性白血病、慢性骨髄性白血病を含む悪性血液疾患の両方)、心筋梗塞及びアテローム性動脈硬化からなる群から選択される虚血性疾患を含む心臓疾患、血管内凝固、骨吸収、骨粗しょう症、歯周炎並びに低塩酸症からなる群から選択される、IL−17A及び/又はIL−17Fにより仲介される、或いはIL−17A及び/又はIL−17Fのレベルの上昇に伴う、該病的障害の治療又は予防における使用のための、請求項1〜4のいずれか一項に記載の抗体或いは請求項10又は11に記載の医薬組成物。
- 次に示すステップを含む、IL−17Fに対して、2nMより優れた結合親和性を有し、IL−17Aに対して、100pMより優れた結合親和性を有する、ヒトIL−17A及びヒトIL−17Fに結合する中和抗体であって、配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体を交差ブロックし、及び/又は配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体によって交差ブロックされる該中和抗体を同定する方法;
(1)該中和抗体が、配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体のヒトIL−17A及びヒトIL−17Fへの結合を交差ブロックするかどうかを決定するステップ、並びに/又は
(2)該中和抗体が、配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体によってヒトIL−17A及びヒトIL−17Fを結合することから交差ブロックされるかどうかを決定するステップ。 - 前記抗体が配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体のヒトIL−17A及びヒトIL−17Fへの結合を80%超交差ブロックし、並びに/又は配列番号9で示される配列を含む重鎖及び配列番号7で示される配列を含む軽鎖を有する抗体によって、ヒトIL−17A及びヒトIL−17Fを結合することから80%超交差ブロックされる、請求項14に記載の方法。
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