JP2018523673A - Pdgfに対する重鎖のみ抗体 - Google Patents
Pdgfに対する重鎖のみ抗体 Download PDFInfo
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- JP2018523673A JP2018523673A JP2018507602A JP2018507602A JP2018523673A JP 2018523673 A JP2018523673 A JP 2018523673A JP 2018507602 A JP2018507602 A JP 2018507602A JP 2018507602 A JP2018507602 A JP 2018507602A JP 2018523673 A JP2018523673 A JP 2018523673A
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- pdgf
- antigen binding
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Abstract
Description
本願は、2015年8月14日に出願された米国仮出願第62/205,191号及び2016年5月9日に出願された米国仮出願第62/333,772号の利益を主張する。前記出願はいずれもその内容全体を参照として本明細書に援用する。
本明細書において、PDGFに対する特異性を有する単一特異性重鎖のみ抗体(HCAb)ならびにPDGF及びANG‐2またはVEGFに対する特異性を有する二重特異性抗体を開示する。
表1
(1)疎水性:ノルロイシン、Met、Ala、Val、Leu、Ile;
(2)中性親水性:Cys、Ser、Thr;
(3)酸性:Asp、Glu;
(4)塩基性:Asn、Gin、His、Lys、Arg;
(5)鎖の配向性に影響を与える残基:Gly、Pro;及び
(6)芳香族:Trp、Tyr、Phe。
すべての動物の処置は、動物実験委員会によって定められたガイドラインに従って実施した。Harbour抗体(ケンブリッジ、マサチューセッツ州)のHCAbマウスを用いて、抗PDGF抗体を作製した。
所望のハイブリドーマから全RNAを単離し、特異的プライマーを用いてPCRにより増幅した。各ハイブリドーマから単離したVH領域(図3)を、LgG1ヒンジ領域及びCH2/CH3領域に融合させ、GS SYSTEM(商標)(Lonza、バーゼル、スイス)発現プラスミド中にHCAb配列を形成した。発現プラスミドをCHO細胞株に形質移入して完全ヒト組換えHCAbを産生した。
表2.抗PDGF‐BB HCAbの配列
BIACORE(登録商標)instrument(Biacore T200、GE Healthcare Life Sciences)による25℃でのリアルタイム表面プラズモン共鳴バイオセンサーアッセイを用いて、選択した精製抗ヒトPDGF‐βモノクローナル抗体への抗原結合の結合親和性及び速度定数を測定した。抗ヒトIgG Fc抗体を、標準的なカップリングキット(GE Healthcare、BR‐1008‐39)を使用し、メーカーの説明書に従って、CM5バイオセンサーチップ(GE Healthcare)に直接固定した。精製した抗PDGF‐BB HCAb分子をランニングバッファーHBS‐EPB(GE Healthcare、BR‐1006‐69)で希釈して0.5〜1.0μg/mlとし、抗ヒトIgG Fc表面に結合させて捕捉した。ヒトPDGF‐BB(R&Dシステム、220‐BB)の0.625〜10nMの範囲の2倍系列希釈物を、30μl/minの流速で抗PDGF‐BB HCAb捕捉表面上に注入した。会合速度(Ka)及び解離速度(Kd)を、BIAcore T200評価ソフトウェアバージョン2.0(GE Healthcare)を用いた1:1 Langmuir結合モデルに基づいて計算した。平衡解離定数(Kd)は、Koff/Konの比によって決定した。異なる抗PDGF BB HCAbの速度論的結合パラメータを表3に示す。
表3.ヒトPDGF BBへの抗PDGF BB HCAbの結合特性
*検出限界未満
96ウェルマイクロタイタープレート上で2μg/mL/ウェルのPDGFRβ‐Fc(R&D Systems)を4℃で一晩コーティングした。別のプレートにおいて、抗PDGF BB HCAbの系列希釈物を、2nMのヒトビオチン化PDGF‐BB(R&D Systems)の存在下で1時間、インキュベートした。PDGFRβ‐Fcをコーティングしたマイクロタイタープレートに、100μLの抗PDGF BB HCAb‐PDGF‐BB混合物を1時間、アプライした。次いで、検出抗体(抗ビオチンHRP)を1時間、添加し、化学発光HRP基質を用いてELISAを実施し、ELISAプレートリーダーで読み取った。抗PDGF BB HCAbは、PDGF‐BBの、その受容体PDGFRβへの結合をブロックしたが、そのPDGFRβへのブロックに関する抗PDGF BB HCAbのIC50を表4にまとめる。
表4.PDGFRβへのPDGF BBの結合に対する抗PDGF BB HCAbのブロッキング
改変した場合に抗PDGF BB HCAb P36C12の結合親和性を変化させるようなCDR配列中のアミノ酸位置を、アラニンスキャニング法を用いて同定した。
表5
Claims (40)
- PDGFに対する抗原結合特異性を有する重鎖のみ抗体(HCAb)であって、前記HCAbが、配列番号10、14、18、22、26、30、34、38、42、46、または50のうちの1つの可変重鎖(VH)領域配列を有する、前記HCAb。
- PDGFに対する抗原結合特異性を有するHCAbであって、前記HCAbのVH領域配列が、前記配列番号10、14、18、22、26、30、34、38、42、46、または50のうちの1つの配列に対し、少なくとも85%の同一性を有する、前記HCAb。
- PDGFがPDGF‐BBである、請求項1または2のいずれかに記載のHCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、1つ以上の相補性決定領域(CDR)が、配列番号11〜13、15〜17、19〜21、23〜25、27〜29、31〜33、35〜37、39〜41、43〜45、47〜49及び51〜53から選択される、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、1つ以上の前記CDRが、配列番号11〜13、15〜17、19〜21、23〜25、27〜29、31〜33、35〜37、39〜41、43〜45、47〜49及び51〜53から選択される前記CDR配列に少なくとも85%の同一性を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号11〜13を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号15〜17を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号19〜21を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号23〜25を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号27〜29を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号31〜33を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号35〜37を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号39〜41を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号43〜45を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号47〜49を有する、前記HCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDRが配列番号51〜53を有する、前記HCAb。
- 前記VH領域の少なくとも1つのアミノ酸が、置換、付加、または欠失しており、HCAbがPDGF‐BBに対するその特異性を保持している、請求項1、2、または4〜16のいずれか一項に記載のHCAb。
- PDGF‐BBに対する抗原結合特異性を有するHCAbであって、前記CDR1がGFTFSSYA_(配列番号23)を有し、7位のアミノ酸が任意のアミノ酸で置換され、HCAbがPDGF‐BBに対するその特異性を保持している、前記HCAb。
- 前記7位のアミノ酸が保存的アミノ酸で置換されており、HCAbがPDGF‐BBに対するその特異性を保持している、請求項18に記載のHCAb。
- 前記7位のアミノ酸が同じクラスのアミノ酸で置換されており、HCAbがPDGF‐BBに対するその特異性を保持している、請求項18に記載のHCAb。
- PDGFに対する抗原結合特異性を有するHCAbであって、前記CDR2がISGSGGST(配列番号24)を有し、3位または8位のアミノ酸の1つ以上が任意のアミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、前記HCAb。
- 前記3位または8位のアミノ酸の1つ以上が保存的アミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、請求項21に記載のHCAb。
- 前記3位または8位のアミノ酸の1つ以上が同じクラスのアミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、請求項21に記載のHCAb。
- PDGFに対する抗原結合特異性を有するHCAbであって、前記CDR3がRNSEIFMVKGVIQYNS(配列番号25)を有し、3、4、8、9、10、11、12、13、14、または16位のアミノ酸の1つ以上が任意のアミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、前記HCAb。
- 前記3、4、8、9、10、11、12、13、14、または16位のアミノ酸の1つ以上が保存的アミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、請求項24に記載のHCAb。
- 前記3、4、8、9、10、11、12、13、14、または16位のアミノ酸の1つ以上が同じクラスのアミノ酸で置換されており、前記HCAbがPDGF‐BBに対するその特異性を保持している、請求項24に記載のHCAb。
- HCAb P36F3、P36E10、P36E8、P36C12、P36A4、P36A3、P36D9、P36E4、P36E9、P36G9、及び/またはP36H4とPDGF‐BBとの結合に競合するヒトまたはヒト化抗体。
- PDGFに対する第一の抗原結合特異性、及びVEGFに対する第二の抗原結合特異性を有する二重特異性抗体。
- 前記第一の抗原結合特異性が、請求項1、2、または4〜26のいずれか一項に記載のHCAbによって表される、請求項28に記載の二重特異性抗体。
- 前記第二の抗原結合特異性が、ベバシズマブ、またはそのVHもしくはVL領域によって表される、請求項28に記載の二重特異性抗体。
- 前記第二の抗原結合特異性が、ラニビズマブ、またはそのVHもしくはVL領域によって表される、請求項28に記載の二重特異性抗体。
- PDGFに対する第一の抗原結合特異性、及びANG‐2に対する第二の抗原結合特異性を有する二重特異性抗体。
- 前記第一の抗原結合特異性が、請求項1、2、または4〜27のいずれか一項に記載のHCAbによって表される、請求項32に記載の二重特異性抗体。
- 前記第二の抗原結合特異性が、HCAb A33A8(配列番号54)、A1G2(配列番号55)、A1F8(配列番号56)、A2B6(配列番号57)、またはA1B1(配列番号58)によって表される、請求項32に記載の二重特異性抗体。
- 請求項1、2、または4〜27のいずれか一項に記載のPDGF結合型HCAb、または請求項28〜34のいずれか一項に記載の二重特異性抗体を、それを必要とする対象に投与することを含む、癌疾患の治療方法。
- 前記癌疾患Iが、萎縮型加齢性黄斑変性症、滲出型加齢性黄斑変性症、脈絡膜新生血管(CNV)、嚢胞様黄斑浮腫(CME)、近視関連脈絡膜新生血管、血管線条、糖尿病性黄斑浮腫(DME)、黄斑浮腫、網膜静脈閉塞症、異常な角膜血管新生、結膜翼状片、網膜下浮腫、または網膜内浮腫からなる群から選択される、請求項35に記載の方法。
- 前記異常な角膜血管新生が、角膜炎、角膜移植、ケロイド形成または低酸素症の結果である、請求項35に記載の方法。
- それを必要とする対象における癌疾患の治療用の薬剤の製造における、請求項1、2、または4〜27のいずれか一項に記載のVH領域を有するPDGF結合型HCAb、または請求項28〜34のいずれか一項に記載の二重特異性抗体の使用。
- 前記癌疾患が、加齢性黄斑変性症(AMD)、脈絡膜新生血管(CNV)、嚢胞様黄斑浮腫(CME)、近視関連脈絡膜新生血管、血管線条、糖尿病性黄斑浮腫(DME)、黄斑浮腫、網膜静脈閉塞症、異常な角膜血管新生、結膜翼状片、網膜下浮腫、または網膜内浮腫を含む、請求項38に記載の使用。
- 前記異常な角膜血管新生が、角膜炎、角膜移植、ケロイド形成または低酸素症の結果である、請求項38に記載の使用。
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PCT/US2016/046595 WO2017030909A1 (en) | 2015-08-14 | 2016-08-11 | Heavy chain only antibodies to pdgf |
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JP2018523673A5 JP2018523673A5 (ja) | 2019-08-22 |
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EP (1) | EP3334762A1 (ja) |
JP (1) | JP2018523673A (ja) |
AU (1) | AU2016307943A1 (ja) |
CA (1) | CA2992788A1 (ja) |
HK (1) | HK1254093A1 (ja) |
WO (1) | WO2017030909A1 (ja) |
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US20240043518A1 (en) | 2024-02-08 |
US11028163B2 (en) | 2021-06-08 |
US20200123240A1 (en) | 2020-04-23 |
US20220098295A1 (en) | 2022-03-31 |
AU2016307943A1 (en) | 2018-02-15 |
WO2017030909A1 (en) | 2017-02-23 |
EP3334762A1 (en) | 2018-06-20 |
CA2992788A1 (en) | 2017-02-23 |
US20170044247A1 (en) | 2017-02-16 |
US10308711B2 (en) | 2019-06-04 |
HK1254093A1 (zh) | 2019-07-12 |
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