JP2021506747A - 修飾CκおよびCH1ドメイン - Google Patents
修飾CκおよびCH1ドメイン Download PDFInfo
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- JP2021506747A JP2021506747A JP2020524871A JP2020524871A JP2021506747A JP 2021506747 A JP2021506747 A JP 2021506747A JP 2020524871 A JP2020524871 A JP 2020524871A JP 2020524871 A JP2020524871 A JP 2020524871A JP 2021506747 A JP2021506747 A JP 2021506747A
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- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2863—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for growth factors, growth regulators
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2896—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against molecules with a "CD"-designation, not provided for elsewhere
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- C07K16/32—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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Abstract
Description
「1つの(「a」または「an」)」のエンティティという用語は、そのエンティティの1または複数を指すことに留意されたい。例えば「1つの(「an」)抗体」は、1または複数の抗体を表すと理解される。したがって、1つ(「a」(または「an」))、「1または複数」および「少なくとも1つ」という用語は、本明細書では互換的に使用され得る。
CH1のIMGTエクソン番号付けおよびKabat番号付け
[表1]26位および任意に11位におけるCκの変異基、11位および任意に28位におけるCH1の変異基
[表2]Cκ17/CH1 9の変異基
[表3]破壊され再建された塩橋
水素結合(カットオフ距離:3.5Å)
1F8のCκとCH1との間の塩橋
1F8 CH1の界面残基:
1F8 Cκの界面残基:
水素結合(カットオフ距離:3.5Å)
界面残基:1cz8 CH1
界面残基:1cz8 Cκ
1L7iの疎水性界面
界面残基:1L7i CH1
界面残基:1L7i Cκ
構造4:4NYLのCκおよびCH1の界面相互作用の解析
4NYLの水素結合(カットオフ距離:3.5Å)
4NYLのCKとCHとの間の塩橋
4NYLの疎水性界面
界面残基:4NYL CH1
界面残基:4NYL Cκ
CH1の配列再コード化
[表4]Cκ/CH1相互作用に影響を与える残基対
アラニンのスクリーニング
CH1:LYS96>ASP変異およびCk:GLU16>ARG変異
CH1:LYS96>GLU変異およびCk:GLU16>ARG変異
[表5]CH1_K96/Cκ_E16の変異
[表7]変異を含む試験抗体
[表8]変異を有する試験抗体
[表9]変異を有する試験抗体
Claims (23)
- L11W置換体を含むヒトCH1断片と、V26W置換体を含むヒトCκ断片とを備える、抗体またはその抗原結合断片。
- 前記ヒトCH1断片が置換体L11WおよびK101Eを含み、前記ヒトCκ断片が置換体V26WおよびD15K/Hを含む、請求項1に記載の抗体またはその抗原結合断片。
- 前記ヒトCH1断片が置換体L11WおよびK96Dを含み、前記ヒトCκ断片が置換体V26WおよびE16Rを含む、請求項1に記載の抗体またはその抗原結合断片。
- 前記ヒトCH1断片が置換体L11WおよびK96Eを含み、前記ヒトCκ断片が置換体V26WおよびE16Kを含む、請求項1に記載の抗体またはその抗原結合断片。
- 前記ヒトCH1断片が置換体L11WおよびK96Eを含み、前記ヒトCκ断片が置換体V26WおよびE16Rを含む、請求項1に記載の抗体またはその抗原結合断片。
- 置換体L11Wを含まない第2のヒトCH1断片と、
置換体V26Wを含まない第2のヒトCκ断片と
をさらに備える、請求項1に記載の抗体またはその抗原結合断片。 - 前記第2のヒトCH1断片および前記第2のヒトCκ断片が野生型である、請求項6に記載の抗体またはその抗原結合断片。
- 重鎖可変領域、軽鎖可変領域、Fc領域、またはそれらの組み合わせをさらに備える、請求項1から7のいずれか一項に記載の抗体またはその抗原結合断片。
- クラスIgGである、請求項8に記載の抗体またはその抗原結合断片。
- アイソタイプがIgG1、IgG2、IgG3またはIgG4である、請求項9に記載の抗体またはその抗原結合断片。
- ヒトCH1断片とヒトCκ断片との対を備え、前記ヒトCH1断片および前記ヒトCκ断片は、
(a)CH1のL11KおよびL28N、CκのV26W;
(b)CH1のL11W、およびCκのF11WおよびV26G;
(c)CH1のF9D、CκのQ17RまたはQ17K;ならびに
それらの組み合わせ
からなる群から選択される置換体を含む、抗体またはその抗原結合断片。 - 前記ヒトCH1断片および前記ヒトCκ断片がさらに、(a)CH1のK101EおよびCκのD15K/H、(b)CH1のK96DおよびCκのE16R、(c)CH1のK96EおよびCκのE16K、ならびに(d)CH1のK96EおよびCκのE16Rからなる群から選択される置換体を含む、請求項10に記載の抗体またはその抗原結合断片。
- Leu11位にアミノ酸置換体を含むヒトCH1断片と、V26位および/またはF11位にアミノ酸置換体を含むヒトCκ断片とを備え、前記ヒトCH1断片が前記ヒトCκ断片と対合すると、前記アミノ酸置換体が相互作用する、抗体またはその抗原結合断片。
- 前記ヒトCH1断片が野生型ヒトCκドメインと相互作用せず、ヒトCκドメインが野生型ヒトCH1断片と相互作用しない、請求項13に記載の抗体またはその抗原結合断片。
- 前記アミノ酸置換体が表1から選択される、請求項13に記載の抗体またはその抗原結合断片。
- F9位にアミノ酸置換体を含むヒトCH1断片と、Q17位にアミノ酸置換体を含むヒトCκ断片とを備え、前記ヒトCH1断片が前記ヒトCκ断片と対合すると、前記アミノ酸置換体が相互作用する、抗体またはその抗原結合断片。
- 前記ヒトCH1断片が野生型ヒトCκ断片と相互作用せず、前記ヒトCκ断片が野生型ヒトCH1断片と相互作用しない、請求項16に記載の抗体またはその抗原結合断片。
- 前記アミノ酸置換体が表2から選択される、請求項16に記載の抗体またはその抗原結合断片。
- 重鎖可変領域、軽鎖可変領域、Fc領域、またはそれらの組み合わせをさらに備える、請求項10から18のいずれか一項に記載の抗体またはその抗原結合断片。
- 第1のCH1/Cκ対と第2のCH1/Cκ対とを備える二重特異性抗体であって、前記第1のCH1/Cκ対のCH1断片およびCκ断片は、CH1のL11WおよびCκのV26Wのアミノ酸置換体を含み、前記第2のCH1/Cκ対のCH1断片およびCκ断片は、L11WおよびV26W置換体を含まない、二重特異性抗体。
- 前記第1のCH1/Cκ対のCH1断片およびCκ断片が、(a)CH1のK101EおよびCκのD15K/H、(b)CH1のK96DおよびCκのE16R、ならびに(c)CH1のK96EおよびCκのE16Kからなる群から選択される置換体をさらに含み、前記第2のCH1/Cκ対のCH1断片およびCκ断片は、(a)から(c)の前記置換体を含まない、請求項20に記載の二重特異性抗体。
- 請求項1から19のいずれか一項に記載の抗体またはその抗原結合断片、および医薬上許容し得る担体を備える、組成物。
- 請求項1から19のいずれか一項に記載の抗体またはその抗原結合断片をコードする1または複数のポリヌクレオチドを備える、単離された細胞。
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