JP2013542722A - ヒトii型コラーゲンに結合する抗体 - Google Patents
ヒトii型コラーゲンに結合する抗体 Download PDFInfo
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Abstract
Description
i.配列番号8、14及び20;
ii.配列番号9、15及び21;
iii.配列番号9、15及び22;
iv.配列番号9、15及び23;
v.配列番号9、15及び24;
vi.配列番号9、15及び25;
vii.配列番号9、15及び26;
viii.配列番号9、15及び27;
ix.配列番号9、15及び28;
x.配列番号10、16及び29;
xi.配列番号11、17及び30;
xii.配列番号12、18及び31;又は
xiii.配列番号13、19及び32、に示されるような重鎖相補性決定領域(CDR)1、2及び3(HCDR1、HCDR2及びHCDR3)配列を含み、並びに、
VL領域は、
xiv.配列番号33、42及び46;
xv.配列番号34、42及び47;
xvi.配列番号35、43及び48;
xvii.配列番号36、44及び49;
xviii.配列番号37、42及び50;
xix.配列番号38、42及び51;
xx.配列番号35、44及び52;
xxi.配列番号39、42及び53;
xxii.配列番号40、45及び54;又は
xxiii.配列番号41、42及び55、に示されるような軽鎖CDR 1、2及び3(LCDR1、LCDR2及びLCDR3)配列を含む。
本発明は、ヒトII型コラーゲンに結合するモノクローナル抗体を提供する。これらの抗体は、研究試薬、診断試薬、及び賦形剤として有用であり、例えば、関節に治療薬を送達するための賦形剤として有用である。
本発明の抗体は、研究試薬として、並びに、関節などのヒトII型コラーゲンを発現する部位に対する治療薬分子の送達剤として、有用である。
II型コラーゲンに結合するmAbの同定
ヒトII型コラーゲンに結合するFabを、デノボpIXファージディスプレイライブラリ(Shi et al.,J.Mol.Biol.397:385〜396,2010;国際公開第2009085462(A1)号;米国特許出願番号第12/546850号)から選別した。ライブラリは、ヒト生殖系列VH遺伝子IGHV1−69*01、IGHV3−23*01、及びIGHV5−51*01、並びにヒト生殖系列VLκ遺伝子O12(IGKV1−39*01)、L6(IGKV3−11*01)、A27(IGKV3−20*01)、及びB3(IGKV4−1*01)を多様化させて生成した。完全なVH及びVLドメインを構築するにあたって、IGHV遺伝子を、H3ループによりヒトIGHJ−4ミニ遺伝子で組み換え、IGKV遺伝子をIGKJ−1ミニ遺伝子により組み換えた。多様化に際し、重鎖及び軽鎖可変領域内の、タンパク質抗原及びペプチド抗原と高頻度に接していると同定されるH1、H2、L1、L2及びL3ループ周辺の対応する位置を選別した。選別した位置の配列多様性は、それぞれのIGHV又はIGLV遺伝子に含まれるIGHV又はIGLV生殖系列遺伝子ファミリーにおいて各位置に見られる残基に制限した。長さがアミノ酸7〜14個分の単鎖〜中鎖型の合成ループを用い、H3ループにおける多様性をもたらした。H3ループにおけるアミノ酸分布は、ヒト抗体において観察されるアミノ酸変異を模倣するよう設計された。ライブラリ設計の詳細は、Shi et al.,J.Mol.Biol.397:385〜396,2010に記載されている。生成したライブラリにおけるVH H1及びH2の多様性を表4に示す。表4はH3に関し、表5はVL L1、L2及びL3に関し示す。ライブラリを生成するために利用したスキャフォールドは、これらのヒトVH及びVL遺伝子由来に従って命名した。多様性をもたらすために構築し使用したVH及びVLスキャフォールドの配列を、配列番号1〜7で示す。(3〜23:配列番号1;1〜69:配列番号2;5〜51:配列番号3;O12:配列番号4;L6:配列番号5;L27:配列番号6;B3:配列番号7)(図1)。スクリーニングにあたって、3つの重鎖ライブラリを、4種の生殖系列軽鎖又は生殖系列軽鎖ライブラリと組み合わせ、24のユニークなVH:VLの組み合わせを生成した。
他のコラーゲンとのcol II mAbの交差反応性
最初のパニングから得られた、ヒトII型コラーゲンに結合するFabを、ヒトI型、IV型及びV型コラーゲン、並びにラットI型及びII型コラーゲンとの交差反応性についてスクリーニングした。
pIXを切除した形質転換物からコロニーを採取し、2xYT Carbで増殖させた。翌日、50μLの飽和培養液を使用して、ウェル当たり400μLの2xYT Carbを含有させた発現プレートに播種し、このプレートで37℃にて6時間にわたって増殖させた。1mMのIPTGを添加してFab発現を誘導し、このプレートを30℃にて一晩静置した。翌日、発現誘導を行ったFab培養液を2000rpmにて10分に遠心沈降させ、清澄なライセートを以降のアッセイに使用した。
製造業者の指示に従い、Maxisorp ELISAプレート(Nunc)を、10μg/mLのヒトI型コラーゲン(Chondrex)、ヒトII型コラーゲン(Chondrex)、ラットI型コラーゲン(Chondrex)、ラットII型コラーゲン(Chondrex)で、又は5μg/mLのヒトIV型コラーゲン(Chemicon)若しくはヒトV型コラーゲン(Chemicon)で、又は1μg/mLの抗Fd(結合部位)(すべて溶媒はPBS)でコーティングした。ウェルをTBSTで3回洗浄し、200mLの3%ミルク(溶媒はTBST)で1時間ブロッキングした。コーティングしたELISAプレートのウェルに100μLのFabライセートを加え、室温にて1時間インキュベートした。ウェルを3回洗浄し、その後、PBSで1:5000希釈した100μLの抗κ−HRP(Southern Biotech)を添加した。これらのプレートを室温にて1時間にわたってインキュベートし、TBSTで3回洗浄し、BM化学発光ELISA基質(Roche Applied Science)で発光させた。ヒトI型、IV型若しくはV型コラーゲン又はラットI型コラーゲンに結合せずに、ヒト及びラットのII型コラーゲンに結合したクローンを配列決定し、ユニークなクローンを更に特徴付けた。図3は、更なる特徴付けのために選別した13のクローンについてのELISAデータを示す。Fabの配列は、図2及び表1に示す。
ヒト軟骨に対するCol II mAbの結合
Fabの小規模精製
2xYT Carbで(ただし、Fab 551−3の発現ではTurboBroth(Athena ES)を使用した)、大腸菌に1mMのIPTGにより30℃にて一晩Fab発現を誘導した。発現誘導したバクテリアを4500rpmで30分遠心しペレット化し、この細胞ペレットを、プロテアーゼ阻害剤を添加した溶解緩衝液(20mMトリス(pH 8.5)、350mMのNaCl、7.5mMのイミダゾール)に再懸濁し、マイクロフルイダイザーに2回通して破砕した。この細胞可溶化物に対し10,000rpmにて10分の遠心処理を2回行い、清澄化した。溶解緩衝液で平衡化したTalonレジン(Clontech)2mLを、清澄化させた可溶化物に添加した。各回毎に溶出緩衝液(150mMのEDTA、20mMのトリス(pH 8.5))を用い、5分間のインキュベートを2回行なって、結合していたFabを溶出させ、20mMのトリス(pH 8.5)で透析した。透析したFabを、Q−sepharose Fast Flow樹脂(QFF樹脂;GE Healthcare)を用い更に精製し、実験に使用した。
ヒト軟骨を変形性関節症患者から得た(Northland Laboratories)。まず軟骨を微粉砕し、プロテアーゼ阻害剤を添加したPBSに懸濁し、これを懸濁液として4℃で保存した。軟骨に対する結合性を試験するために、3%ミルクを含有させた97.5μLのTBSTに、データ点当たり2.5μLの軟骨懸濁液を添加し、混合液を室温にて1時間に振盪させた。真空マニホールドを用い、MultiScreen HTSプレート(Millipore)を使用して、軟骨に対するFabの結合性を試験した。簡潔には、予め湿らせたMultiScreenプレートに100μLの懸濁液を加え、減圧して軟骨をウェルフィルターに沈着させ、その後、ウェルをTBSTで2回洗浄した。2.4μgのFabをそれぞれ100μLのPBSウェルに溶解させたものをウェルに加え、室温にて1時間にわたってインキュベートした。ウェルをTBSTで3回洗浄した後、抗κ−HRP(Southern Biotech)をウェルに加えた。1時間のインキュベーション後、ウェルをPBSTで洗浄し、BM化学発光ELISA基質(Roche Applied Science)を添加し、得られた軟骨断片の懸濁液を、発光検出するために黒色ウェルのELISAプレートに移した。13のFabすべてが軟骨に対する結合性を示した(図4)。
Col IIに対するmAb親和性
ELISA
上述のELISAアッセイを用い、Fabを選別するためのEC50値を得た。このアッセイでは、10ng/mL〜10μg/mLの濃度範囲のFab溶液100マイクロリットルをそれぞれウェルに加えた。EC50値は表6に示す。
ヒト及びラットのII型コラーゲンに対して標準的な方法を用い、Biacore結合動態試験を実施した(表6b)。
抗II型コラーゲンmAbは、in vivoで関節に定着する。
2つの抗II型コラーゲンFab(323−G1(CNTO 3631)及び169−31(CNTO 4093)、並びに、細胞外マトリックス成分に結合しなかった対照mAb(CNTO 4234)をヨウ素標識し、半月板切除したラットの膝に注射して、コラーゲンに対するmAbの結合性が、関節滞留時間にもたらす影響について評価した。Fabは、Na125I(Perkin Elmer)及びヨウ素−GENチューブ(Pierce)を用いて、同位体標識した。PD−10脱塩カラム(GE Healthcare)を用いて遊離ヨウ素を除去し、Amiconウルトラ遠心濾過装置(Millipore;10,000 MWCO)を用いてFabを2.2mg/mLに濃縮した。ヨウ素標識後、II型コラーゲンに対する結合性についてFabを試験したところ、ヨウ素標識による明らかな障害はまったく観察されなかった。
Claims (12)
- 重鎖可変領域(VH領域)及び軽鎖可変領域(VL領域)を含む、ヒトII型コラーゲンに結合する単離モノクローナル抗体又はその断片であって、前記VH領域は、
i.配列番号8、14及び20;
ii.配列番号9、15及び21;
iii.配列番号9、15及び22;
iv.配列番号9、15及び23;
v.配列番号9、15及び24;
vi.配列番号9、15及び25;
vii.配列番号9、15及び26;
viii.配列番号9、15及び27;
ix.配列番号9、15及び28;
x.配列番号10、16及び29;
xi.配列番号11、17及び30;
xii.配列番号12、18及び31;又は
xiii.配列番号13、19及び32、に示されるような重鎖相補性決定領域(CDR)1、2及び3(HCDR1、HCDR2及びHCDR3)配列を含み、並びに、
前記VL領域は、
xiv.配列番号33、42及び46;
xv.配列番号34、42及び47;
xvi.配列番号35、43及び48;
xvii.配列番号36、44及び49;
xviii.配列番号37、42及び50;
xix.配列番号38、42及び51;
xx.配列番号35、44及び52;
xxi.配列番号39、42及び53;
xxii.配列番号40、45及び54;又は
xxiii.配列番号41、42及び55、に示されるような軽鎖CDR 1、2及び3(LCDR1、LCDR2及びLCDR3)配列を含む、単離モノクローナル抗体又はその断片。 - VH領域及びVL領域を含む、ヒトII型コラーゲンに結合する単離モノクローナル抗体又はその断片であって、前記VH領域は、配列番号56、57、58、59、60、61、62、63、64、65、66、67又は68に示される配列を有するアミノ酸配列を含み、前記VL領域は、配列番号69、70、71、72、73、74、75、76、5又は7に示される配列を有するアミノ酸配列を含む、単離モノクローナル抗体又はその断片。
- VH領域及びVL領域を含む、ヒトII型コラーゲンに結合する単離抗体であって、前記VH領域は、配列番号9、15及び28に示されるようなHCDR1、HCDR2及びHCDR3配列を含み、前記VL領域は、配列番号39、42及び53に示されるようなLCDR1、LCDR2及びLCDR3配列を含む、単離抗体。
- VH領域及びVL領域を含む、ヒトII型コラーゲンに結合する単離モノクローナル抗体又はその断片であって、前記VH領域は、配列番号11、17及び30に示されるようなHCDR1、HCDR2及びHCDR3配列を含み、前記VL領域は、配列番号34、42及び47に示されるようなLCDR1、LCDR2及びLCDR3配列を含む、単離モノクローナル抗体又はその断片。
- 前記抗体がFab断片を含む、請求項1に記載の単離抗体。
- 配列番号56、57、58、59、60、61、62、63、64、65、66、67又は68に示されるアミノ酸配列を含む、単離抗体重鎖可変領域。
- 配列番号69、70、71、72、73、74、75又は76に示されるアミノ酸配列を含む、単離抗体軽鎖可変領域。
- 請求項6に記載の抗体重鎖可変領域をコードする、単離ポリヌクレオチド。
- 請求項7に記載の抗体軽鎖可変領域をコードする、単離ポリヌクレオチド。
- 請求項8又は9に記載の少なくとも1つのポリヌクレオチドを含む、ベクター。
- 請求項10に記載のベクターを含む、宿主細胞。
- 請求項11に記載の宿主細胞を培養する工程と、前記宿主細胞によって産生された抗体を回収する工程とを含む、ヒトII型コラーゲンに結合する抗体の製造方法。
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JP2017530092A (ja) * | 2014-07-28 | 2017-10-12 | フィロゲン エスピーエー | 治療及び診断のための抗コラーゲン抗体 |
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JP2020063198A (ja) * | 2018-10-15 | 2020-04-23 | 学校法人東京理科大学 | 樹状細胞の成熟抑制剤及び成熟抑制方法、並びに医薬組成物 |
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JP6126991B2 (ja) | 2017-05-10 |
ES2757857T3 (es) | 2020-04-30 |
CN103429616A (zh) | 2013-12-04 |
WO2012047583A3 (en) | 2013-10-03 |
EP3050899A1 (en) | 2016-08-03 |
CN103429616B (zh) | 2016-08-10 |
CA2812389C (en) | 2019-12-31 |
EP2621950A2 (en) | 2013-08-07 |
US8394378B2 (en) | 2013-03-12 |
IL225397A0 (en) | 2013-06-27 |
WO2012047583A2 (en) | 2012-04-12 |
EP2621950A4 (en) | 2015-09-02 |
EP3050899B1 (en) | 2019-09-04 |
US20120108795A1 (en) | 2012-05-03 |
CA2812389A1 (en) | 2012-04-12 |
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