JP6437913B2 - 複合体特異的抗体及び抗体断片並びにその使用 - Google Patents
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Description
本願は、その全体が参照により組み込まれる、2012年8月20日出願の米国特許仮出願第61/684,836号明細書による利益を主張する。
別の態様では、本開示は、単離されたモノクローナル抗体又はその断片に関し、該単離されたモノクローナル抗体又はその断片は、100nM、90nM、80nM、70nM、60nM、50nM、40nM、30nM、20nM、10nM、9nM、8nM、7nM、6nM、5nM、4nM、3nM、2nM又は1nM未満のEC50濃度で、特定の同族抗原結合部分とその抗原との複合体に特異的に結合する。
一態様において、本開示は、同族抗原結合部分とその抗原との複合体に特異的に結合する、単離されたモノクローナル抗体又はその断片に関する。別の態様では、本開示は、特定の同族抗原結合部分とその抗原との複合体に特異的に結合する、単離されたモノクローナル抗体又はその断片に関する。一実施形態では、前記同族抗原結合部分、又は前記特定の同族抗原結合部分は、同族抗体又はその断片である。一実施形態では、前記同族抗体若しくはその断片、又は前記特定の同族抗体若しくはその断片は、治療的抗体又は治療的抗体断片である。別の実施形態では、前記同族抗体若しくはその断片、又は前記特定の同族抗体若しくはその断片は、診断的抗体又は診断的抗体断片である。
一態様において、本開示は、特定の同族抗原結合部分とその抗原との複合体に特異的に結合する、単離されたモノクローナル抗体又はその断片に関し、ここで抗原はタンパク質である。好ましい実施形態では、タンパク質は、ヒトタンパク質である。
一態様において、本開示は、サンプル中の同族抗原結合部分とその抗原との複合体、又は特定の同族抗原結合部分とその抗原との複合体の検出のための、単離された抗体又はその断片の使用に関し、ここで前記単離された抗体又はその断片は、同族抗原結合部分とその抗原との複合体、又は特定の同族抗原結合部分とその抗原との複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合しない。
a)前記サンプルを、単離された抗体又はその断片と接触させるステップと、ここで前記単離された抗体又はその断片は、前記複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合せず、
b)前記複合体に結合した前記単離された抗体又は断片を検出するステップと、を含む。
a)前記サンプルを、単離された抗体又はその断片と接触させるステップと、ここで前記単離された抗体又はその断片は、前記複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合せず、
b)前記複合体に結合した前記単離された抗体又は断片を検出するステップと、
c)前記複合体に結合した前記単離された抗体又は断片を、抗原結合同族抗原結合部分の濃度と相関させるステップと、を含む。
a)分析するべきサンプルを提供するステップと、
b)前記サンプルを、単離された抗体又はその断片と接触させるステップと、ここで前記単離された抗体又はその断片は、前記複合体に特異的に結合し、前記同族抗体又は前記抗原の何れか単独には結合せず、
c)前記複合体に結合した前記単離された抗体又は断片を検出するステップと、
d)前記複合体に結合した前記単離された抗体又は断片を、抗原結合同族抗体の濃度と相関させるステップと、を含む。
a)同族抗原結合部分の抗原を固定化するステップと、
b)前記固定化された抗原と前記サンプルとの接触をもたらすステップと、
c)前記同族抗原結合部分とその抗原との間で形成された複合体を、前記複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合しない、単離された抗体又はその断片を用いて検出するステップと、を含む。
a)同族抗原結合部分の抗原を固定化するステップと、
b)前記固定化された抗原と前記サンプルとの接触をもたらすステップと、
c)前記同族抗原結合部分とその抗原との間で形成された複合体を、前記複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合しない、単離された抗体又はその断片を用いて検出するステップと、を含む。
a)同族抗原結合部分の抗原を固定化するステップと、
b)前記固定化された抗原と前記サンプルとの接触をもたらすステップと、
c)前記同族抗原結合部分とその抗原との間で形成された複合体を、前記複合体に特異的に結合し、前記同族抗原結合部分又は前記抗原の何れか単独には結合しない、単離された抗体又はその断片を用いて検出するステップと、
d)b)で形成された複合体を、サンプル中の非結合同族抗原結合部分の濃度と相関させるステップと、を含む。
(a)抗体又は抗体断片のライブラリーを、非結合抗原と、同族抗体と同一のアイソタイプを有する抗体との存在下で、同族抗体とその抗原との複合体、又は特定の同族抗体とその抗原との複合体に対してスクリーニングするステップと、
(b)前記同族抗体とその抗原との複合体、又は前記特定の同族抗体とその抗原との複合体、及び結合した抗原結合部分を単離するステップと、
(c)前記抗原結合部分を同定及び単離するステップと、を含む。
(a)抗体又は抗体断片のライブラリーを、非結合抗原と、同族抗体と同一のアイソタイプ及び同一のフレームワークを有する抗体との存在下で、同族抗体とその抗原との複合体、又は前記特定の同族抗体とその抗原との複合体に対してスクリーニングするステップと、
(b)前記同族抗体とその抗原との複合体、又は前記特定の同族抗体とその抗原との複合体、及び結合した抗原結合部分を単離するステップと、
(c)前記抗原結合部分を同定及び単離するステップと、を含む。
本明細書で使用される用語「抗原結合部分」は、所定の抗原に特異的に結合する能力を与えるポリペプチドを含む部分を指す。例えば、抗体、抗体断片、抗体誘導体、抗体様足場及び代替的な足場は、少なくとも1つの抗原結合部分を含む。抗原結合部分はまた、単一ドメイン抗体、マキシ抗体、ミニ抗体、細胞内抗体、二重特異性抗体、三重特異性抗体、四重特異性抗体、v−NAR及びscFvに組み込まれてもよい(例えば、Hollinger and Hudson,2005,Nature Biotechnology,23,9,1126−1136参照)。抗原結合部分を含む分子の更なる例は、本明細書にて下記に提供され、フィブロネクチン(Adnexus、Bristol−Myers Squibb,Waltham,MAが完全に所有)、ラクダ科動物抗体、アンキリン(Molecular Partners AG,Zurich,Switzerland)、ドメイン抗体(Domantis,Ltd.,Cambridge,MA及びAblynx nv,Zwijnaarde,Belgium)、リポカリン(Pieris Proteolab AG,Freising,Germany)、小モジュラー免疫薬(Trubion Pharmaceuticals Inc.,Seattle,WA)、マキシボディ(Avidia,Inc.,Mountain View,CA)、タンパク質A(Affibody AG,Sweden)、及びアフィリン(γ−クリスタリン又はユビキチン)(Scil Proteins GmbH,Halle,Germany)を含む。
抗体/抗原複合体を特異的に認識する抗体を選択するために、市販のファージディスプレイライブラリー、MorphoSys HuCAL PLATINUM(登録商標)ライブラリーを使用した。前記抗体ライブラリーは、HuCAL(登録商標)概念(Knappik et al.,(2000)J Mol Biol 296:57−86)に基づき、ファージ表面上にFabを表示するのにCysDisplay(登録商標)技術を使用する(Lohningに付与された国際公開第2001/05950号パンフレット)。しかしながら、利用可能な任意の他の抗体ライブラリーが複合体特異的な抗体の同定に好適であろう。
アダリムマブ/TNF−α複合体に特異的に結合する抗体を同定するために、溶液パニング手法において、磁気ビーズ及びアダリムマブに結合した組み換えTNF−α(BioLegend 570108、Lot B137143)を抗原として使用した。
溶液パニングのために、TNF−αをEpoxy M−450磁気ビーズ(Dynabeads M−450、Dynal)に共有結合させ、ファージディスプレイ抗体ライブラリーのファージ製剤を洗浄し、Chemiblocker(Chemicon)でブロックする。
一次スクリーニングをELISAにより行った。上述したパニング手順の結果から368のクローンを無作為に選定し、384ウェルのELISAプレート内で成長させた。抗体発現の誘導(0.75mM IPTG、30℃で20時間)と、リゾチームを使用した細胞溶解の後、抗体を含む細胞溶解物をELISAにて試験した。
最初に、7つの抗体を、ELISAにて、一連の無関連及び関連抗原並びにアダリムマブ/TNF−α複合体に対する特異的結合に関して試験し、ここでアダリムマブをプレート上に被覆して、TNF−αを複合体の形成に供し、又はその逆の何れかであった。従って、5μg/mLの各抗原をマイクロタイタープレート上に一晩被覆した。5%BSAで洗浄及びブロッキングした後、Fab−FHフォーマットの抗アダリムマブ/TNF−α抗体(2μg/mL溶液から20μL)を加えた。検出は、HRP標識抗His抗体及びQuantaBlu蛍光ペルオキシダーゼ基質を使用して行った。AdaTNF#1及びAdaTNF#5は、複合体に対して高い特異性を有することが証明された(図1)。
インフリキシマブTNF−α複合体に特異的に結合する抗体を同定するために、溶液パニング手法において、磁気ビーズ及びインフリキシマブに結合した組み換えTNF−α(BioLegend 570108、Lot B137143)を抗原として使用した。
MOR103/GM−CSF複合体に特異的に結合する抗体を同定するために、固相パニング手法において、組み換えビオチン化ヒトGM−CSF及びMOR103を抗原として使用した。
実施例1に記載したパニング手順に従って、ファージ製剤を調製した。
一次スクリーニングをELISAにより行った。上述したパニング手順の結果から368のクローンを無作為に選定し、284ウェルのELISAプレート内で成長させた。抗体発現の誘導(0.75mMIPTG、30℃で20時間)と、リゾチームを使用した細胞溶解の後、抗体を含む細胞溶解物をELISAにて試験した。
M103GmCSF#1を更に特徴付けた。MOR103単独、ビオチン化GM−CSF、又はMOR103に結合したビオチン化GM−CSFの何れかをアビジン被覆プレート上に被覆した。HisタグM103GmCSF#1Fabを濃度を増大させて加え、His特異的POD結合二次抗体を使用して検出し、QuantaBlu蛍光ペルオキシダーゼ基質を使用して定量化した。M103GmCSF#1は、薬物−標的複合体に対する結合に高い選択性を示し、個々のタンパク質(薬物及び標的)には示さなかった(図7)。薬物−標的複合体に対するM103GmCSF#1Fabの一価親和性:kD=4.9nM。
ヒト血清又は血漿からの特定の抗体/抗原複合体を監視及び定量化するために、MSD(登録商標)(Meso Scale Discovery)技術に基づいて、頑強な薬物動態学的検出アッセイを確立した。
Claims (6)
- 特定の同族抗体とその抗原との複合体に特異的に結合し、前記特定の同族抗体又は前記抗原の何れか単独には結合しない、単離されたモノクローナル抗体又はその断片の同定方法であって、前記方法が
(a)抗体又は抗体断片のライブラリーを、非結合抗原、及び、前記特定の同族抗体と同一のアイソタイプを有する抗体の存在下で、前記特定の同族抗体とその抗原との複合体に対してスクリーニングするステップと、
(b)前記特定の同族抗体とその抗原との複合体、及び、結合した抗体又は抗体断片を単離するステップと、
(c)前記抗体又は抗体断片を同定及び単離するステップと、
を含むことを特徴とする方法。 - 請求項1に記載の方法において、前記単離されたモノクローナル抗体又はその断片が、前記特定の同族抗体の可変領域の1又は複数のアミノ酸を含むことを特徴とする方法。
- 請求項1又は2に記載の方法において、前記単離されたモノクローナル抗体又はその断片が、ヒト化又はヒトモノクローナル抗体又は断片であることを特徴とする方法。
- 請求項1乃至3の何れか1項に記載の方法において、前記特定の同族抗体が、マウス、キメラ、ヒト化又はヒトモノクローナル抗体又はその断片であることを特徴とする方法。
- 請求項4に記載の方法において、前記特定の同族抗体又はその断片が、アダリムマブ、MOR103、リツキシマブ、トラスツズマブ、アレムツズマブ、ベバシズマブ、セツキシマブ、ゲムツズマブ、インフリキシマブ、ラニビズマブ、ウステキヌマブ、ゴリムマブ、ナタリズマブ、オファツムマブ、オマリズマブ、パニツムマブからなるがこれらに限定されないリストから選択されることを特徴とする方法。
- 請求項1乃至5の何れか1項に記載の方法において、前記抗原がサイトカイン又は受容体であることを特徴とする方法。
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US8093018B2 (en) | 2008-05-20 | 2012-01-10 | Otsuka Pharmaceutical Co., Ltd. | Antibody identifying an antigen-bound antibody and an antigen-unbound antibody, and method for preparing the same |
FR2939431B1 (fr) * | 2008-12-05 | 2011-01-28 | Valagro Carbone Renouvelable | Procede de production d'un produit intermediaire destine a la production d'ethanol, et produit intermediaire obtenu. |
AU2010274320B2 (en) * | 2009-07-21 | 2013-08-01 | Sekisui Medical Co., Ltd. | Insulin measurement method |
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EP2885639B1 (en) | 2019-04-10 |
CN104995517B (zh) | 2018-07-17 |
EP3540438A1 (en) | 2019-09-18 |
JP2015531762A (ja) | 2015-11-05 |
EP2885639A1 (en) | 2015-06-24 |
US20180134807A1 (en) | 2018-05-17 |
US20200339703A1 (en) | 2020-10-29 |
KR102410763B1 (ko) | 2022-06-20 |
WO2014026905A1 (en) | 2014-02-20 |
US20240067753A1 (en) | 2024-02-29 |
CA2878814A1 (en) | 2014-02-20 |
KR20150041801A (ko) | 2015-04-17 |
AU2013304237B2 (en) | 2017-12-21 |
AU2013304237A1 (en) | 2015-01-29 |
ES2734130T3 (es) | 2019-12-04 |
CN104995517A (zh) | 2015-10-21 |
US20150197579A1 (en) | 2015-07-16 |
CA2878814C (en) | 2023-03-14 |
DK2885639T3 (da) | 2019-07-08 |
US10774154B2 (en) | 2020-09-15 |
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