JP4113890B2 - 抗体の調製 - Google Patents
抗体の調製 Download PDFInfo
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- JP4113890B2 JP4113890B2 JP2005351160A JP2005351160A JP4113890B2 JP 4113890 B2 JP4113890 B2 JP 4113890B2 JP 2005351160 A JP2005351160 A JP 2005351160A JP 2005351160 A JP2005351160 A JP 2005351160A JP 4113890 B2 JP4113890 B2 JP 4113890B2
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- C07K16/2809—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
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Description
(a)
(b)
(c)
(d)
(e)
(f)
およびこれらの保存的に修飾された派生体である。
“保存的に修飾された派生体“とは当該技術分野においてよく知られており、抗体−抗原の親和力に本質的に影響を与えることのない変化を有する派生体を意味する。
(a)
(b)
(c)
および、これらの保存的に修飾された派生体から選択された重鎖、および/または、少なくとも1つ、特に3つのCDRがアミノ酸配列:
(d)
(e)
(f)
およびこれらの保存的に修飾された派生体から選択される軽鎖を有する。
本発明の脱グリコシル抗体は、前述のような好ましいCDRを含んでいる場合、都合のいいことに、特異的な重鎖CDRを1つ以上と特異的な軽鎖CDRを1つ以上を両方とも有している。CDR(a),(b),(c)は重鎖中で次のように配列される。リーダー配列から定常部(N末端からC末端へ)の方向へ、フレームワーク領域1/(a)/フレームワーク領域2/(b)/フレームワーク領域3/(c)/フレームワーク領域4。また、CDR(d),(e),(f)は軽鎖中で次のように配列される。リーダー配列から定常部(N末端からC末端へ)の方向へ、フレームワーク領域1/(d)/フレームワーク領域2/(e)/フレームワーク領域3/(f)/フレームワーク領域4。そこで3つの配列が全て存在する場合には、重鎖CDRはリーダー配列から定常部の方向へ、(a),(b),(c)と並び、軽鎖CDRはリーダー配列から定常部の方向へ、(d),(e),(f)と並ぶのが好ましい。
3つの望ましいCDRをすべて含む脱グリコシル抗体においては、重鎖可変部は下記の配列:
より成る。
同様にラットCD3抗体の軽鎖の1つ、或いはそれ以上の好ましいCDRは好ましくはヒトの可変部領域フレームワークに存在し、この領域の配列は、リーダー配列から定常領域へ向かい、次のようなものである。CDRは、前述のような(d),(e),(f)、それらの保存的に修飾された派生体、若しくは別の選択可能なCDRを示す。
3つの望ましいCDRをすべて含む脱グリコシル抗体においては、軽鎖可変部は下記の配列:
より成る。
可変部は、例えば上述のように1つ若しくは複数の好ましいCDRを含むが、好ましくはヒト抗体由来の可変フレームワーク領域を有する人体に適応した形で、適切な定常部に結合している。
(a)完全に2価抗体である抗体;
(b)2つの欠損重鎖(つまりFc断片)のみから成る抗体断片;および
(c)欠損重鎖と通常の重鎖に結合した軽鎖からなる、CD3抗原に対して単価な抗体断片。
上記(c)の抗体断片は、Fab’アームを1つだけ持つため、単価である。この方法によってこのような断片の形で単価抗体を生成することは、多くの理由から好ましい。すなわち、得られた抗体断片は、細胞系で生成された抗体混合物から精製することが容易である。なぜなら、例えば、分子量に基づいて簡単に分離できるからである。欧州特許出願第131424号の方法では生成された単価抗体は大きさや外見が2価抗体と似た性質を示すので、このような分離は不可能である。
(a)
(b)
(c)
(d)
(e)
(f)
そのような細胞系は特に、次のような配列からなる長いDNA配列を有する:
(1)ヒト重鎖の可変フレームワーク領域および(a),(b),(c)のうちの1つまたは複数を発現するDNA;
(2)ヒト軽鎖の可変フレームワーク領域および(d),(e),(f)のうちの1つまたは複数を発現するDNA。
(1)前述のヒトVHIII型遺伝子VH26.D.J.にコードされる重鎖フレームワーク領域中に配列された(a),(b),(c)をコードしている配列;および
(2)ヒトVL λ型遺伝子SUTにコードされる軽鎖フレームワーク領域中に配列された(d),(e),(f)をコードしている配列;
がある。CDR配列(a),(b),(c),(d),(e),(f)には下線が引いてある。
(1)(配列ID No.23)
本発明の、人体に適応させた脱グリコシル化抗体は治療用に用いることができる。特に、人体に適応し、且つヒトCD3抗原に特異性を持つような脱グリコシル化抗体は、免疫抑制のために適用できるという価値がある。特に、免疫抑制が持続性ではなく一過性のものであることが望まれ、従って、T細胞を完全に破壊するのではなくCD3抗原−TCR複合体による抗体防御によって機能させないようにすることが強く望まれる移植拒絶反応の場合の免疫抑制のために有用である。さらに、脱グリコシル化C3抗体は、治療剤の有効性がエフェクタ−細胞のFcを介した死またはFc受容体発現細胞の非特異的な死のそれぞれによって低下する可能性がある癌の治療において、特に(エフェクタ−細胞の再標的のための)2価抗体を作成したり、抗体−毒素結合体を生成したりするといったように、他の分野においても利用できる可能性を秘めている。
本発明は、下記の実施例、および、以下に列記する実施例の解説図によって説明される。
ヒトCD3抗原に特異的なYTH12.5ラット抗体のV領域遺伝子のクローニングと再編成は、Routledgeら.,1991,Eur.J.Immunol.,21,2717及び英国特許出願第9121126.8号とその対応出願に記載されている。YTH12.5は、CD3抗原複合体に特異的なIgG2bモノクローナル抗体を分泌している、ラットハイブリドーマ細胞系である。
た。人体に適応させたVL 遺伝子を発現ベクターpHβApr−1に挿入した。
野性型ヒトIgG−CD3重鎖ベクター、p278の類似体の作成方法は、種々の文献に記載されている(Routledgeら.,1991,Eur.J.Immunol.,21,2717−2725)。ヒトIgG2(Flanagan&Rabbitts,1982,Nature 300,709−713)、IgG3(Huckら.,1986,Nuc.Acid.Res.,14、1779−1789)、IgG4(Flanagan&Rabbitts,1982,Nature 300,709−713),イプシロン(ε)(Flanagan&Rabbitts,1982,EMBO.Journal 1,655−660)およびα−2(Flanagan&Rabbitts,1982,Nature 300,709−713)の定常部遺伝子の非変異体を有するH鎖発現ベクターは、p316ベクターから作成した(各々、ベクターp317,p318,p320,p321,p325)。軽鎖ベクターp274と結合したこれらベクターを、前述のdhfr−CHO細胞へ導入することにより、各々γ1、γ2、γ3、γ4、εおよびα−2のアイソタイプに対するCD3抗体を分泌する細胞系が作成された。CD3抗体を発現している細胞を用いて軟寒天中で2回クローニングを行い、その後回転式ボトル培養装置で大量培養を行った。各々の細胞系の約4リットルの組織培養上清から、免疫グロブリンを硫酸アンモニウム沈殿法によって採集し、PBS中で透析を行い、次の方法で定量した。
CD3抗体が溶液中のT細胞の増殖を支持する能力は、抗体のFc領域と補助細胞上のFc受容体との相互作用に関係している。
実施例1の脱グリコシル化IgG1Ag抗体が、混合リンパ球反応(MLR)においてT細胞増殖を抑制する能力があるかを調べるための一連の実験を行った。2つの実験の結果を図9乃至図12に示してある。
脱グリコシル化抗体は確かに混合リンパ球反応を抑制する;抗体が滴定(希釈)されていくに従い、抑制効果が低下し、増殖が促進される。´野性型´IgG1は実際T細胞の分裂促進活性を有するので、この反応においては、MCRの抑制は全く観察されない。
実施例1の脱グリコシル化抗体(IgG1Ag)を含むヒトCD3εサブユニットを遺伝子導入したマウスにおいて、キメラ抗ヒトCD3抗体を用いて、in vivo実験を行った。注射を一回行った後に、キメラCD3抗体がTNF因子放出を引き起こす能力を比較した。
この実験は、文献(Gillilandら.,1988,PNAS USA,85,4419)の記載に従って行い、「活性化T細胞をFcγRを産生している標的細胞にクロスリンクさせ、標的細胞の溶解を媒介する能力」がCD3モノクローナル抗体にあるかを測定した。簡単に述べると、Fcγ受容体I、IIおよびIIIを発現しているヒト単核細胞U937を51Crクロム酸ナトリウム塩でラベルし、2×105 細胞/mlになるように再懸濁した。これらの細胞を標的として用いた。ヒト末梢血液リンパ球を増殖促進CD3抗体によって活性化し続いてIL−2を含む培地で培養することによって生産したヒトT細胞未分化細胞をエフェクタ−細胞として用いた。分析を行う前に、それらを洗浄し、2×105 細胞/mlの濃度で再懸濁した。精製キメラ抗体の調製液100μlをマイクロタイタープレートのウェル中で3倍希釈とした。エフェクター細胞および標的細胞を50μlずつ各々のウェルに加え、その混合物を37℃で4時間以上インキュベートした。この後100μlの上清を除去し、放出された51Crを測定した。各抗体の希釈液について二回ずつ実験を行った。
Claims (5)
- ヒトCD3に特異的に結合する、2価の脱グリコシル化IgG1アイソタイプCDR抗体であって、
当該抗体が、
各々が、ヒト可変フレームワーク領域及びその定常領域とは異なる起源であって、以下のアミノ酸配列:
(a)Ser−Phe−Pro−Met−Ala (SEQ ID No.l),
(b)Thr−Ile−Ser−Thr−Ser−Gly−Gly−Arg−Thr−Tyr−Tyr−Arg−Asp−Ser−Val−Lys−Gly (SEQ ID No.2),
(c)Phe−Arg−Gln−Tyr−Ser−Gly−Gly−Phe−Asp−Tyr (SEQ ID No.3)
を含む3つのCDRを伴うヒト重鎖、及び
各々が、可変フレームワーク領域及びその定常領域とは異なる起源であって、以下のアミノ酸配列:
(d)Thr−Leu−Ser−Ser−Gly−Asn−Ile−Glu−Asn−Asn−Tyr−Val−His (SEQ ID No.4),
(e)Asp−Asp−Asp−Lys−Arg−Pro−Asp (SEQ ID No.5),
(f)His−Ser−Tyr−Val−Ser−Ser−Phe−Asn−Val (SEQ ID No.6)
を含む3つのCDRを伴う軽鎖を有し、
ここにおいて、重鎖CDRはリーダーから定常部の方向へ、(a),(b),(c)の順に配列されており、かつ、軽鎖CDRはリーダーから定常部の方向へ、(d),(e),(f)の順に配列されている、
そして、前記抗体は、
モチーフ アスパラギン297−X298−セリン299若しくはスレオニン299(Xは、プロリン以外の任意のアミノ酸を示す)が、抗体のN−結合グリコシル化を防ぐように、アラニン297−X298−セリン299若しくはアラニン297−X298−スレオニン299のアミノ酸による置換、によって変えられている、ヒト由来の重鎖定常領域、及び、
次のアミノ酸配列:
Glu−Val−Gln−Leu−Leu−Glu−Ser−Gly−Gly−Gly−Leu−Val−Gln−Pro−Gly−Gly−Ser−Leu−Arg−Leu−Ser−Cys−Ala−Ala−Ser−Gly−Phe−Thr−Phe−Ser−Ser−Phe−Pro−Met−Ala−Trp−Val−Arg−Gln−Ala−Pro−Gly−Lys−Gly−Leu−G1u−Trp−Val−Ser−Thr−Ile−Ser−Thr−Ser−Gly−Gly−Arg−Thr−Tyr−Tyr−Arg−Asp−Ser−Val−Lys−Gly−Arg−Phe−Thr−Ile−Ser−Arg−Asp−Asn−Ser−Lys−Asn−Thr−Leu−Tyr−Leu−Gln−Met−Asn−Ser−Leu−Arg−Ala−Glu−Asp−Thr−Ala−Val−Tyr−Tyr−Cys−Ala−Lys−Phe−Arg−Gln−Tyr−Ser−Gly−Gly−Phe−Asp−Tyr−Trp−Gly−Gln−Gly−Thr−Leu−Val−Thr−Val−Ser−Ser(SEQ ID NO: 11)
を含む重鎖可変部、を有する
前記脱グリコシル化IgG1アイソタイプCDR抗体。 - 可変部フレームワーク領域の全てが、ヒトのもの、または、ヒトに由来するものである、請求項1に記載の脱グリコシル化IgG1アイソタイプCDR抗体。
- 可変部フレームワーク領域が、マウスのもの、または、マウスに由来するものである、請求項1又は2に記載の脱グリコシル化IgG1アイソタイプCDR抗体。
- 次のアミノ酸配列:
Asp−Phe−Met−Leu−Thr−Gln−Pro−His−Ser−Val−Ser−Glu−Ser−Pro−Gly−Lys−Thr−Val−Ile−lle−Ser−Cys−Thr−Leu−Ser−Ser−Gly−Asn−Ile−Glu−Asn−Asn−Tyr−Val−His−Trp−Tyr−Gln−Gln−Arg−Pro−Gly−Arg−Ala−Pro−Thr−Thr−Val−Ile−Phe−Asp−Asp−Asp−Ly−sA rg−Pro−Asp−Gly−Val−Pro−Asp−Arg−Phe−Ser−Gly−Ser−Ile−Asp−Arg−Ser−Ser−Asn−Ser−Ala−Ser−Leu−Thr−Ile−Ser−Gly−Leu−Gln−Thr−Glu−Asp−Glu−Ala−Asp−Tyr−Tyr−Cys−His−Ser−Tyr−Val−Ser−Ser−Phe−Asn−Val−Phe−Gly−Gly−Gly−Thr−Lys−Leu−Thr−Val−Leu(SEQ ID N0:16)
を含む軽鎖可変部を有する、請求項1または2に記載の脱グリコシル化IgG1アイソタイプCDR抗体。 - 請求項1または2に記載の脱グリコシル化IgG1アイソタイプCDR抗体を、生理的に許容される希釈剤若しくは担体とともに含む、免疫抑制のための薬剤組成物。
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| Application Number | Priority Date | Filing Date | Title |
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| GB929206422A GB9206422D0 (en) | 1992-03-24 | 1992-03-24 | Antibody preparation |
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| JP2003270135A Division JP4113467B2 (ja) | 1992-03-24 | 2003-07-01 | 抗体の調製 |
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| JP2003270135A Expired - Fee Related JP4113467B2 (ja) | 1992-03-24 | 2003-07-01 | 抗体の調製 |
| JP2005351160A Expired - Fee Related JP4113890B2 (ja) | 1992-03-24 | 2005-12-05 | 抗体の調製 |
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| JP2003270135A Expired - Fee Related JP4113467B2 (ja) | 1992-03-24 | 2003-07-01 | 抗体の調製 |
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| CA2257357C (en) | 1996-06-07 | 2010-04-13 | Neorx Corporation | Humanized antibodies with modified glycosylation |
| US6528624B1 (en) * | 1998-04-02 | 2003-03-04 | Genentech, Inc. | Polypeptide variants |
| GB9815909D0 (en) | 1998-07-21 | 1998-09-16 | Btg Int Ltd | Antibody preparation |
| US7183387B1 (en) | 1999-01-15 | 2007-02-27 | Genentech, Inc. | Polypeptide variants with altered effector function |
| US6737056B1 (en) * | 1999-01-15 | 2004-05-18 | Genentech, Inc. | Polypeptide variants with altered effector function |
| IL144056A0 (en) * | 1999-01-15 | 2002-04-21 | Genentech Inc | Polypeptide variants with altered effector function |
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| ES2312494T3 (es) * | 2000-12-14 | 2009-03-01 | Genentech, Inc. | Produccion de anticuerpos completos en celulas procariotas. |
| US6979556B2 (en) | 2000-12-14 | 2005-12-27 | Genentech, Inc. | Separate-cistron contructs for secretion of aglycosylated antibodies from prokaryotes |
| US6720165B2 (en) | 2001-06-14 | 2004-04-13 | Zyomix, Inc. | Methods for making antibody fragments and compositions resulting therefrom |
| CN100513414C (zh) * | 2001-08-27 | 2009-07-15 | 杰南技术公司 | 进行抗体表达和装配的系统 |
| GB2380127A (en) * | 2001-09-26 | 2003-04-02 | Isis Innovation | Treatment of chronic joint inflammation |
| BR0213761A (pt) * | 2001-10-25 | 2005-04-12 | Genentech Inc | Composições, preparação farmacêutica, artigo industrializado, método de tratamento de mamìferos, célula hospedeira, método para a produção de uma glicoproteìna e uso da composição |
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-
1992
- 1992-03-24 GB GB929206422A patent/GB9206422D0/en active Pending
- 1992-10-21 WO PCT/GB1992/001933 patent/WO1993019196A1/en active IP Right Grant
- 1992-10-21 EP EP92921508A patent/EP0586617B1/en not_active Expired - Lifetime
- 1992-10-21 AT AT92921508T patent/ATE155818T1/de active
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- 1992-10-21 CA CA002109815A patent/CA2109815C/en not_active Expired - Lifetime
- 1992-10-21 KR KR1019930703582A patent/KR100238497B1/ko not_active Expired - Lifetime
- 1992-10-21 DE DE69221147T patent/DE69221147T2/de not_active Expired - Lifetime
- 1992-10-21 US US07/988,925 patent/US5585097A/en not_active Expired - Lifetime
- 1992-10-21 ES ES92921508T patent/ES2106195T3/es not_active Expired - Lifetime
- 1992-10-21 JP JP51633993A patent/JP4065554B2/ja not_active Expired - Lifetime
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- 2005-12-15 US US11/300,278 patent/US20060165691A1/en not_active Abandoned
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Also Published As
| Publication number | Publication date |
|---|---|
| GR3024489T3 (ja) | 1997-11-28 |
| JPH07500017A (ja) | 1995-01-05 |
| US20060165692A1 (en) | 2006-07-27 |
| US20060088526A1 (en) | 2006-04-27 |
| US20070134241A1 (en) | 2007-06-14 |
| CA2109815C (en) | 2003-02-04 |
| US20060269547A1 (en) | 2006-11-30 |
| US20060165691A1 (en) | 2006-07-27 |
| US6706265B1 (en) | 2004-03-16 |
| WO1993019196A1 (en) | 1993-09-30 |
| JP4065554B2 (ja) | 2008-03-26 |
| CA2109815A1 (en) | 1993-09-30 |
| DE69221147T2 (de) | 1998-01-15 |
| EP0586617B1 (en) | 1997-07-23 |
| JP2006089501A (ja) | 2006-04-06 |
| US20070178092A1 (en) | 2007-08-02 |
| ATE155818T1 (de) | 1997-08-15 |
| JP2004000249A (ja) | 2004-01-08 |
| GB9206422D0 (en) | 1992-05-06 |
| AU671085B2 (en) | 1996-08-15 |
| DE69221147D1 (de) | 1997-09-04 |
| EP0586617A1 (en) | 1994-03-16 |
| KR100238497B1 (ko) | 2000-01-15 |
| US20060165693A1 (en) | 2006-07-27 |
| US20070154477A1 (en) | 2007-07-05 |
| AU2766892A (en) | 1993-10-21 |
| JP4113467B2 (ja) | 2008-07-09 |
| US5585097A (en) | 1996-12-17 |
| ES2106195T3 (es) | 1997-11-01 |
| US20040202657A1 (en) | 2004-10-14 |
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