JP4733736B2 - Ccr5に対する抗体およびそれらの使用 - Google Patents
Ccr5に対する抗体およびそれらの使用 Download PDFInfo
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- JP4733736B2 JP4733736B2 JP2008503436A JP2008503436A JP4733736B2 JP 4733736 B2 JP4733736 B2 JP 4733736B2 JP 2008503436 A JP2008503436 A JP 2008503436A JP 2008503436 A JP2008503436 A JP 2008503436A JP 4733736 B2 JP4733736 B2 JP 4733736B2
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- C07K2317/565—Complementarity determining region [CDR]
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Description
本発明は、抗体の可変重鎖アミノ酸配列CDR3が、重鎖CDR3配列SEQ ID NO:16または17からなる群より選択されることを特徴とする、CCR5に結合する抗体を含む。
a)アミノ酸配列SEQ ID NO:1によって定義される重鎖(VH)可変ドメイン、およびSEQ ID NO:2によって定義される軽鎖(VH)可変ドメイン;
b)アミノ酸配列SEQ ID NO:3によって定義される重鎖可変ドメイン、およびSEQ ID NO:4によって定義される軽鎖可変ドメイン;
c)アミノ酸配列SEQ ID NO:5によって定義される重鎖可変ドメイン、およびSEQ ID NO:6によって定義される軽鎖可変ドメイン;
d)アミノ酸配列SEQ ID NO:7によって定義される重鎖可変ドメイン、およびSEQ ID NO:8によって定義される軽鎖可変ドメイン。
「抗体」という用語は、抗体全体、抗体断片を含むがそれらに限定されない、様々な形態の抗体構造を包含する。本発明による抗体は、好ましくは、ヒト化抗体、キメラ抗体、または、本発明による特徴的性質が保持される限り更に遺伝子改変された抗体である。
SEQ ID NO:1 <CCR5>Pz01.F3重鎖、可変ドメイン
SEQ ID NO:2 <CCR5>Pz01.F3軽鎖、可変ドメイン
SEQ ID NO:3 <CCR5>Pz02.1C11重鎖、可変ドメイン
SEQ ID NO:4 <CCR5>Pz02.1C11軽鎖、可変ドメイン
SEQ ID NO:5 <CCR5>Pz03.1C5重鎖、可変ドメイン
SEQ ID NO:6 <CCR5>Pz03.1C5軽鎖、可変ドメイン
SEQ ID NO:7 <CCR5>F3.1H12.2E5重鎖、可変ドメイン
SEQ ID NO:8 <CCR5>F3.1H12.2E5軽鎖、可変ドメイン
SEQ ID NO:9 重鎖CDR1
SEQ ID NO:10 重鎖CDR1
SEQ ID NO:11 重鎖CDR1
SEQ ID NO:12 重鎖CDR1
SEQ ID NO:13 重鎖CDR2
SEQ ID NO:14 重鎖CDR2
SEQ ID NO:15 重鎖CDR2
SEQ ID NO:16 重鎖CDR3
SEQ ID NO:17 重鎖CDR3
SEQ ID NO:18 軽鎖CDR1
SEQ ID NO:19 軽鎖CDR1
SEQ ID NO:20 軽鎖CDR1
SEQ ID NO:21 軽鎖CDR2
SEQ ID NO:22 軽鎖CDR2
SEQ ID NO:23 軽鎖CDR2
SEQ ID NO:24 軽鎖CDR3
SEQ ID NO:25 軽鎖CDR3
SEQ ID NO:26 γ1重鎖定常領域
SEQ ID NO:27 γ4重鎖定常領域
SEQ ID NO:28 κ軽鎖定常領域
ヒトCCR5に対するモノクローナル抗体の生産
a)マウスの免疫
メスのBalb/cマウスに、アジュバントCFA(完全フロイントアジュバント)を伴う107個のCCR5発現細胞(CHOまたはL1.2)での第一次(primary)腹腔内免疫がなされる。続いて、4〜6週間後に、IFA(不完全フロイントアジュバント)を伴う再び同一の107個のCCR5発現細胞での1回の更なる腹腔内免疫がなされる。その後、各マウスには、4〜6週間間隔で、PBSにおける再び107個のCCR5発現細胞(CHOまたはL1.2)が投与される。その後、融合の3日または4日前に、最後の免疫が、再び107個のCCR5発現細胞で腹腔内に、または、2x106個のCCR5発現細胞を用いて静脈内に行われる。
a)に従って免疫されたマウスの脾臓細胞は、Galfre, Methods in Enzymology 73, 1981,3に従って骨髄腫細胞と融合される。免疫されたマウスの約1 x 108個の脾臓細胞が、およそ同一の数の骨髄腫細胞(P3X63-Ag8-653, ATCC CRL 1580)と混合され、融合されて、続いてHAZ培地(100 mmol/l ヒポキサンチン、1μg/ml アザセリンを含むRPMI 1640+10% FCS)において培養される。約10日後、初代培養が、特異的な抗体産生について試験される。細胞ELISAにおいてCCR5と陽性反応を示し、かつ、トランスフェクションされていない親細胞と交差反応を示さない初代培養が、限界希釈または蛍光活性化細胞選別器の手段によって、96ウェル細胞培養プレートにおいてクローン化される。寄託された細胞株は、この様式で取得された。
マウス可変領域に連結されたヒト定常領域からなるキメラ抗体の発現のためのベクターは、以下のように構築され得る。発現ベクターpSVgptにおいて、ヒトIgG1およびヒトIgG4定常領域に連結された抗CCR5マウスVHからなる2個のキメラ重鎖発現ベクターが構築される。発現ベクターpSVhygにおいて、ヒトCκに連結された抗CCR5マウスVKからなるキメラ軽鎖ベクターが構築される。リーダーシグナルペプチド、リーダーイントロンおよびマウスイムノグロブリンプロモーターを含む5フランキング配列、ならびに、スプライス部位およびイントロン配列を含む3フランキング配列が、ベクターVH-PCR1およびVK-PCR1を鋳型として用いて導入される。重鎖および軽鎖発現ベクターは、NS0細胞(ECACC No 85110503、イムノグロブリンを産生しないマウス骨髄腫)にコトランスフェクションされる。トランスフェクションされた細胞クローンは、ヒトIgGのためのELISAによって、ヒト抗体の産生についてスクリーニングされる。
変異種(変異体)抗CCR5 IgG1およびIgG4のための発現プラスミドの構築
変異種抗CCR5γ1およびγ4重鎖をコードする発現プラスミドは、QuickChange(登録商標)Site-Directed mutagenesis Kit (Stratagene)を用いて、野生型発現プラスミドの部位特異的変異誘発によって作製され得、表1に記述される。アミノ酸は、EUナンバリング[Edelman, G.M., et al., Proc. Natl. Acad. Sci. USA 63 (1969) 78-85; Kabat, E.A., et al., Sequences of Proteins of Immunological Interest, Fifth Ed., NIH Publication No. 91-3242 (1991)]によって、番号がつけられる。
細胞‐細胞融合アッセイ
1日目に、gp160発現HeLa細胞(2 x 104細胞/50μl/ウェル)が、10% FCSおよび2μg/mlドキシサイクリンで補足されたDMEM培地において、白色96マイクロタイタープレートに播種される。2日目に、ウェルあたり100μlの上清試料または抗体対照が、透明の96マイクロタイタープレートに添加される。その後、培地中に8x104個のCEM-NKr-Luc浮遊細胞を含む100μlが添加され、30分、37℃でインキュベーションされる。Hela細胞培養培地が、96ウェルプレートから吸引され、200μl抗体/CEM-NKr-Luc混合物より100μlが添加されて、一晩、37℃でインキュベーションされる。3日目に、100μl/ウェルのBright-Glo(登録商標) Luciferase assay substrate(1,4-ジチオスレイトールおよび亜ジチオン酸ナトリウム;Promega Corp. USA)が添加され、RTでの最低15分のインキュベーションの後、発光が測定される。
Hela-R5-16細胞(デオキシサイクリン誘導時にHIV gp160を発現する細胞株)は、400μg/ml G418および200μg/mlハイグロマイシンBとともに、栄養素および10%FCSを含むDMEM培地において培養される。
Bright-Glo(登録商標) Luciferase assay substrate (Promega Corp. USA, part No EE26B)
抗体Bについての結果が、図1に示される。
生ウイルスでの抗ウイルスアッセイ
PBMCは、Lymphoprep(登録商標)(Nycomed Pharma AG, Oslo, Norway)を用いた密度勾配遠心分離によって単離されたバフィーコートより調製される。4人の異なるドナー由来の細胞が混合されて、1日間PHAで刺激され、続いて、1%ペニシリン/ストレプトマイシン、1% glutamax、1%ピルビン酸ナトリウム、1%非必須アミノ酸、および10% FBSを含むRPMI培地において、2日間、5 U/ml IL-2の存在下で培養された。
CCR5細胞ELISA
組換えでCCR5を発現する20000個のCHO細胞が、96ウェルプレートにつき播種され、一晩37℃でインキュベーションされる。その後、培地が吸引されて、40μlの新鮮な培地が添加される。10μlの培地における希釈抗体が添加され、2時間、4℃でインキュベーションされる。培地が吸引され、100μlグルタルジアルデヒド(PBSにおいてc=0.05%)が添加されて、10分間室温でインキュベーションされる。200μl PBSで3回洗浄した後、50μlの検出抗体1(ELISAブロッキングにおいて1000倍希釈)が添加され、2時間、室温でインキュベーションされる。50μlの3,3',5,5'-テトラメチルベンジジン(TMB)が添加されて、7分後に反応が停止される。光学濃度が、450 nm(対620 nm)で測定される。
NK細胞上のFcγRIIIaに結合するCCR5 Mabの能力
本発明の抗体の、ナチュラルキラー(NK)細胞上のFcγRIIIa(CD16)に結合する能力を決定するために、末梢血単核球(PBMC)が単離され、FcγRIIIaを介した結合を検証するために、20μg/mlのFcγRIIIaに対するブロッキングマウス抗体(抗CD16、クローン3G8、RDI, Flanders, NJ)の存在下または非存在下で、20μg/mlの抗体および対照抗体とインキュベーションされる。陰性対照として、FcγRIIIaに結合しないヒトIgG2およびIgG4(The Binding Site)が使用される。ヒトIgG1およびIgG3(The Binding Site)が、FcγRIIIa結合についての陽性対照として含まれる。NK細胞に結合した抗体は、PE標識マウス抗ヒトCD56(NK細胞表面マーカー)抗体(BD Biosciences Pharmingen, San Diego, CA)を、FITC標識ヤギF(ab)2抗ヒトIgG(Fc)抗体(Protos Immunoresearch, Burlingame, CA)と組み合わせて使用して、FACS解析によって検出される。最大結合(Bmax)は、20μg/mlの抗体濃度で決定される。対照抗体(ヒトIgG4)は、ヒトIgG1についての100% Bmaxと比較して、30%までのBmaxを示す。そのため、「FcγRIIIa結合が無い、またはADCCが無い」とは、20μg/mlの抗体濃度で、ヒトIgG1と比較して30%までのBmax値を意味する。
出願人 :F. Hoffmann-La Roche AG, et al.
出願人の書類番号:23010 WO-SR
国際出願番号 :PCT/EP2006/002974
記載において参照される寄託された生物材料にかかわるエキスパート・ソリューションに関する表示
寄託された生物材料に関する表示は、すべて記載に含まれる。以下の追加の表示は、記載の部分であることを要求されず、「別個の表示」として取り扱われるべきである。これらはエキスパート・ソリューションにのみ関する。
下記の追加の表示は、以下に参照される寄託された生物材料に関する:
22頁の記載における、
m<CCR5)>Pz01.F3 DSM ACC2681
m<CCR5)>Pz02.1C11 DSM ACC2682
m<CCR5)>Pz03.1C5 DSM ACC2683
m<CCR5)>Pz04.1F6 DSM ACC2684
追加の表示:
指定国CA(カナダ)について:
カナダの指定に関して、寄託された生物材料の試料は、カナダ特許の許可まで、または、カナダ特許法の下、特許法施行規則第107および108条に基づいて、出願が、拒絶され、または放棄され回復が不能となり、または取り下げられた日まで、長官により任命された独立なエキスパートへの試料の提供のみにより、入手可能である(施行規則第104条(4))。
指定国EP(欧州特許)について:
欧州特許庁の指定に関して、寄託された生物材料の試料は、ヨーロッパ特許の許可通知が公開されるまで、または、欧州特許条約の下、施行規則第28条(3)に基づいて、出願が、拒絶され、または取り下げられ、または取り下げたと見なされたた日から20年後まで、依頼人により任命されたエキスパートへの試料の提供のみにより、入手可能である(EPC施行規則第28条(4))。
指定国SG(シンガポール)について:
出願人は、上に記載された培養物の試料について、特許法施行規則1995に対する第4スケジュールの第3段落に基づくエキスパートのみが入手可能であると意図することをここに表明する。
Claims (11)
- 以下からなる群より独立して選択される可変重鎖および軽鎖領域を含むことを特徴とする、CCR5に結合する抗体、またはそれらのCCR5結合断片:
a)アミノ酸配列SEQ ID NO:1によって定義される重鎖(VH)可変ドメイン、およびSEQ ID NO:2によって定義される軽鎖(VL)可変ドメイン;
b)アミノ酸配列SEQ ID NO:3によって定義される重鎖可変ドメイン、およびSEQ ID NO:4によって定義される軽鎖可変ドメイン;
c)アミノ酸配列SEQ ID NO:5によって定義される重鎖可変ドメイン、およびSEQ ID NO:6によって定義される軽鎖可変ドメイン。 - 寄託番号DSM ACC2681で表されるハイブリドーマ細胞株mPz01.F3、寄託番号DSM ACC2683で表されるハイブリドーマ細胞株mPz03.1C5、または寄託番号DSM ACC2682で表されるハイブリドーマ細胞株mPz02.1C11によって産生されることを特徴とする、請求項1記載の抗体。
- ヒトIgG4アイソタイプ、またはヒトIgG1アイソタイプであり、IgG1が、CH1とCH2との間のaa220〜240のヒンジ領域、および/または、CH2とCH3との間のaa330の第二ドメイン間領域において任意で改変されることを特徴とする、請求項1または2記載の抗体。
- 寄託番号DSM ACC2681で表されるハイブリドーマ細胞株mPz01.F3、寄託番号DSM ACC2683で表されるハイブリドーマ細胞株mPz03.1C5、または寄託番号DSM ACC2682で表されるハイブリドーマ細胞株mPz02.1C11。
- 薬学的有効量において請求項1〜3いずれか一項記載の抗体を含む、薬学的組成物。
- 薬学的組成物の製造のための、請求項1〜3いずれか一項記載の抗体の使用。
- 薬学的有効量の請求項1〜3いずれか一項記載の抗体を含む、薬学的組成物の製造のための方法。
- 下記で定義されるそれぞれ他方の抗体鎖とともにアセンブルすることが可能であるポリペプチドをコードする核酸であって、該ポリペプチドが以下のいずれかである、核酸:
a)重鎖可変ドメインのアミノ酸配列が、SEQ ID NO:1、3、5からなる群より選択される、抗体重鎖、
b)軽鎖可変ドメインのアミノ酸配列が、SEQ ID NO:2、4、6からなる群より選択される、抗体軽鎖
ここで、前記アセンブルは、
重鎖可変ドメインのアミノ酸配列がSEQ ID NO:1である抗体重鎖と軽鎖可変ドメインのアミノ酸配列がSEQ ID NO:2である抗体軽鎖、
重鎖可変ドメインのアミノ酸配列がSEQ ID NO:3である抗体重鎖と軽鎖可変ドメインのアミノ酸配列がSEQ ID NO:4である抗体軽鎖、又は
重鎖可変ドメインのアミノ酸配列がSEQ ID NO:5である抗体重鎖と軽鎖可変ドメインのアミノ酸配列がSEQ ID NO:6である抗体軽鎖
の間で可能である、前記核酸。 - 治療的有効量の請求項1〜3いずれか一項記載の抗体を含む、免疫抑制性疾患を患う患者の処置のための薬学的組成物。
- Fcγ受容体および/またはC1qに結合しない、請求項1記載のCCR5に結合する抗体の生産のための方法であって、
CCR5に結合するヒトIgG1タイプの請求項1記載の抗体の重鎖をコードする核酸の配列が、改変抗体がC1qおよび/またはFcγ受容体に結合しないような様式で改変され、該改変核酸および該抗体の軽鎖をコードする核酸が発現ベクターに挿入され、該ベクターが真核生物宿主細胞に挿入され、コードされたタンパク質が発現され、および、宿主細胞または上清から回収されることを特徴とする、方法。 - ヒトIgG1タイプであることを特徴とする、Fcγ受容体および/またはC1qに結合しない、請求項1記載のCCR5に結合する抗体。
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BRPI0609792A2 (pt) | 2010-04-27 |
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ZA200708332B (en) | 2009-04-29 |
US7615216B2 (en) | 2009-11-10 |
EP1869087A2 (en) | 2007-12-26 |
TW200720289A (en) | 2007-06-01 |
CA2603692A1 (en) | 2006-10-05 |
CN101175771A (zh) | 2008-05-07 |
WO2006103100A3 (en) | 2006-12-28 |
EP2336183A3 (en) | 2011-10-12 |
AU2006228663A1 (en) | 2006-10-05 |
CR9393A (es) | 2008-02-20 |
JP2008533998A (ja) | 2008-08-28 |
JP2011079836A (ja) | 2011-04-21 |
SG151284A1 (en) | 2009-04-30 |
AR052959A1 (es) | 2007-04-11 |
RU2007139953A (ru) | 2009-05-10 |
NO20074867L (no) | 2007-12-07 |
US20070036796A1 (en) | 2007-02-15 |
EP2336183A2 (en) | 2011-06-22 |
KR20070116136A (ko) | 2007-12-06 |
IL186071A0 (en) | 2008-01-20 |
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