JP2009533347A - 抗TNFα抗体の複合体 - Google Patents
抗TNFα抗体の複合体 Download PDFInfo
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- JP2009533347A JP2009533347A JP2009504347A JP2009504347A JP2009533347A JP 2009533347 A JP2009533347 A JP 2009533347A JP 2009504347 A JP2009504347 A JP 2009504347A JP 2009504347 A JP2009504347 A JP 2009504347A JP 2009533347 A JP2009533347 A JP 2009533347A
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- tnfα antibody
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
- A61K39/44—Antibodies bound to carriers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
- A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
- A61K39/3955—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against proteinaceous materials, e.g. enzymes, hormones, lymphokines
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
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Abstract
Description
特に、本発明の1つ以上の実施形態は、概して抗TNFα抗体(例えば、腫瘍壊死因子α、すなわち「TNFα」に結合する能力を有する抗体)およびポリマーを含む複合体に関する。さらに、本発明は(特に)複合体を含む組成物、複合体を合成する方法、および組成物を投与する方法に関する。
代替的に「カヘキシン」または「カケクチン」と称される腫瘍壊死因子α(TNFα)は、損傷した白血球、内皮細胞、および特定の組織により放出される185アミノ酸長サイトカインである。TNFαは、212アミノ酸長前駆体膜貫通タンパク質の分裂により生体内で形成される。この前駆体膜貫通タンパク質の分裂時に、集合して複合体を形成する可溶性分子が放出される。次にこれらの錯体は、様々な細胞で認められる腫瘍壊死因子レセプタ(TNF‐R)に結合し、それによって、炎症性サイトカインインターロイキン‐6およびインターロイキン‐8の放出、内皮層透過性の増強(その結果、白血球遊走を可能にする)、好中球および好酸球の活性、および滑液および軟骨細胞により生成された組織分解酵素の誘導等の一連の炎症誘発効果をもたらす。
したがって、直接またはスペーサ部分を通じて、非ペプチド水溶性ポリマーに共役結合している抗TNFα抗体を含む複合体が提供される。一般に、複合体は組成物の一部として提供される。
POLYは水溶性ポリマーであり、
(a)はゼロまたは1であり、
Xは存在する場合、1つ以上の原子から成るスペーサ部分であり、
R1はHまたは1〜3の炭素原子を含む有機ラジカルであり、
ATAは抗TNFα抗体の残渣である。
(n)は2〜4000であり、
(g’)は0、1、2、または3であり、
(c)は1〜10であり、
各R2はHまたは有機ラジカルであり、
各R3はHまたは有機ラジカルであり、
(j)は0〜20であり、
ATAは抗TNFα抗体の残渣である。
(n)は2〜4000であり、
(g’)は0、1、2、または3であり、
(c)は1〜10であり、
各R2はHまたは有機ラジカルであり、
各R3はHまたは有機ラジカルであり、
(j)は0〜20であり、
ATAは抗TNFα抗体の残渣である。
POLYは水溶性ポリマーであり、
(a)はゼロまたは1であり、
Xは存在する場合、1つ以上の原子から成るスペーサ部分であり、
R1は、Hまたは1〜3つの炭素原子を含む有機ラジカルであり、
ATAは抗TNFα抗体の残渣である。
POLYは水溶性ポリマーであり、
(a)はゼロまたは1であり、
(j)はゼロまたは1から約20までの整数であり、
(b)はゼロまたは1から約20までの整数であり、
各R2は存在する場合、Hまたは有機ラジカルであり、
各R3は存在する場合、Hまたは有機ラジカルであり、
ATAは抗TNFα抗体の残渣である。
本発明の1つ以上の実施形態について詳細に説明する前に、本発明は、当然のことながら特定のポリマー、合成技術、抗TNF抗体等に限定されない。これは、それらが変化する可能性があるためである。
前述のとおり、一般に複合体は、直接またはスペーサ部分を通じて、非ペプチド水溶性ポリマーに共役結合した抗TNFα抗体を含む。本明細書において「抗TNFα抗体」という用語は、複合前の抗TNFα抗体、および非ペプチド水溶性ポリマーと結合した後の抗TNFα抗体を意味する。しかし、元の抗TNFα抗体が非ペプチド水溶性ポリマーに結合されると、スペーサ部分を通じて任意でポリマーに結合に関連する1つ以上の共役結合が存在するため、抗TNFα抗体がわずかに改変することが理解される。多くの場合、別の分子に結合した抗TNFα抗体がわずかに改変した形態は、抗TNFα抗体の「残渣」と称される。複合体における抗TNFα抗体は、抗TNFα抗体活性を提供する任意のペプチドであってもよい。
前述のとおり、各複合体は水溶性ポリマーに結合した抗TNFα抗体を含む。水溶性ポリマーに関して、水溶性ポリマーは非ペプチド性、非毒性であり、自然発生せず、生体適合性がある。生体適合性に関して、生体組織とともに物質を単体で、または別の物質(例えば、抗TNF抗体等の活性剤)と併せて使用すること(例えば、患者への投与)に関連する有益な効果が、臨床医、例えば医師により評価されるように任意の悪影響に勝る場合、物質は生体適合性があると考えられる。非免疫原性に関して、生体内物質の意図的使用により望ましい免疫反応(例えば、抗体の形成)が生成されない場合、または免疫反応が生じる場合、物質は免疫原性であると考えられ、そのような反応は、臨床医により評価されるように、臨床的に有意または重要であると考えられない。非ペプチド水溶性ポリマーは、生体適合性および非免疫原性であることが好ましい。
polyaおよびpolybは、メトキシポリ(エチレングリコール)等の(同一または異なる)PEG骨格であり、
R”は、H、メチル、またはPEG骨格等の非反応性部分であり、
PおよびQは非反応性結合である。好適な実施形態において、分岐型PEGポリマーは、メトキシポリ(エチレングリコール)二基置換リジンである。使用される特定の抗TNF抗体に応じて、二基置換リジンの反応性エステル官能基をさらに修飾し、抗TNF抗体内における標的基との反応に適した官能基を形成してもよい。
複合体は一般に、組成物の一部である。一般に、組成物は複数の複合体を含み、必ずしもそうではないが、各複合体は同一の抗TNFα抗体で構成されることが好ましい(例えば、全体組成物において、1種類の抗TNFα抗体のみが検出される)。さらに、組成物は複数の複合体を含むことができる。ここで任意の所定の複合体は、2つ以上の異なる抗TNFα抗体から成る群から選択される部分で構成される(例えば、全体組成物において、2つ以上の異なる抗TNFα抗体が検出される)。しかし、最も好ましくは、組成物における実質的にすべての複合体(例えば、組成物における複数複合体の85%以上)が、それぞれ同一の抗TNFα抗体で構成される。
本発明の実施は、別段の指示がない限り、当該技術分野に含まれる有機合成、生化学、タンパク質精製等の従来技術を採用する。そのような技術は、文献において完全に説明されている。例えば、上述のJ.March,Advanced Organic Chemistry:Reactions Mechanisms and Structure,4th Ed.(New York:Wiley‐Interscience,1992)を参照する。
一部の場合において、Invitrogenシステム(SureLock II Precast Gel Electrophoresis System)を使用し、硫酸ドデシルナトリウム‐ポリアクリルアミドゲル電気永動(SDS‐PAGE)によって試料を分析した。サンプルをサンプルバッファと混合した。次に、調製したサンプルをゲルに載せ、約30分間実行した。
一部の場合において、Hitrap Q Sepharose HP陰イオン交換カラム(5ml、Amersham Biosciences)をAKTAprimeシステム(Amersham Biosciences)とともに使用し、調製した複合体を精製した。調製した複合体溶液それぞれに対して、50mM MESバッファ、pH5.4(バッファA)において事前に均衡されるカラムに複合体を載置し、次に9カラム量のバッファAで洗浄して任意の未反応PEG試薬を除去する。続いて、バッファAの勾配を0〜100%バッファB(0.5M NaClバッファを含む50mM MES、pH5.4)を用いて上昇させた。溶離剤をUV検出器により280nmで監視した。任意の高いmer(例えば、11‐mer、10‐mer等)が最初に溶離し、1‐merまで徐々に小さい複合体(例えば、5‐merおよび4‐mer等)が続き、最後に非複合体インフリキシマブ種が溶離する。フラグメントをプールすることができ、個別の複合体の精製をSEC‐HPLC、主にSDS‐PAGEにより判断した。
一部の場合において、サイズ排除クロマトグラフィ(SEC‐HPLC)分析をAgilent 1100 HPLCシステム(Agilent)上で実施した。GF‐450 Zorbax(Agilent)、およびリン酸緩衝化した生理食塩水90%およびpH7.2のエタノール10%を含む移動相を使用してサンプルを分析した。カラムの流量は0.5ml/分であってもよい。溶離したタンパク質およびPEG‐タンパク質複合体は、UVを使用して280nmで検出できる。
実施例1を繰り返し、実施例2bの対照とした。
実施例5の拡大
アルゴン下、−20℃で保存したmPEG‐SMB、30kDaを大気温度に温めた。温めたmPEG‐SMB(65.6mg)を2.0mLの2mM HClに溶解し、mPEG‐SMB溶液を形成した。インフリキシマブに対して200モル過剰のmPEG‐SMBが得られるまで、1.64mgのインフリキシマブを含むストックインフリキシマブ懸濁液のアリコートにmPEG‐SMB溶液を添加した。mPEG‐SMBを添加した後、反応混合液のpHを試験し、確実にpH7.2〜7.5とした。アミド結合を介してmPEG‐SMBをインフリキシマブに結合可能にするため、反応溶液を3時間室温で撹拌した。反応溶液を一晩(16時間)6℃で撹拌し、複合体溶液を生成することによって、結合の継続が可能となった。グリシンで反応を停止させた。
実施例8Aの拡大
実施例8Aを再度、より大規模で実行した。その結果および収率は同様であった。
分岐型mPEG‐MAL、60kDaを用いたインフリキシマブのPEG化
(「mPEG2‐MAL」)
(20:1 ポリマー:インフリキシマブ比)
ほとんどの場合において、抗体を還元することにより、PEG化の後に同様の構造に戻すことができないフラグメントが生成される。任意のイベントにおいて、この反応を行い、還元後の遊離システイン残渣の数に削減する前に、遊離残渣の数を比較した。
実施例および前述の説明に従って調製した複合体を、放射性リガンド結合アッセイに基づく活性について試験した。以下の材料を使用した。ヒトU937細胞;リガンド:0.028nM[125I]TNF‐α;担体:1%50mM NaPO4 pH8.0;培養時間/温度:3時間/4℃;培養バッファ:50mM Tris‐HCl、pH7.4、4℃の0.5mM EDTA;非特異的リガンド:0.04μM TNF‐α;KD0.07nM;BMAX0.2pmol/mgタンパク質;特異的結合60%;定量方法:放射性リガンド結合;有意性基準:最大誘発または抑制の50%以上。提示される場合、Data Analysis ToolboxTM(MDL Information Systems社、San Leandro,CA)を使用し、非線形最小二乗回帰分析によりIC50値を特定した。阻害定数(K1)が提示される場合、ChengおよびPrusoffの方程式(Cheng et al.Biochem.Pharmacol.22:3099-3108,1973)を使用し、観察された試験化合物のIC50、アッセイに採用される放射性リガンドの濃度、およびリガンドのKDの歴史的価値(実験的に取得される)を用いてK1値を計算する。提示される場合、Data Analysis Toolbox(登録商標)を使用して競合的結合曲線の勾配を定義するヒル係数(nH)を計算した。1.0から有意に異なるヒル係数は、結合の変位が単一の結合部位との質量作用の法則に従わないことを意味する場合がある。IC50、K1、および/またはnHデータが標準誤差(SEM)なく提示される場合、データは十分に定量的でなく、提示される値(IC50、K1、nH)は注意して解読する必要がある。表4に結果を示す。
Claims (21)
- 直接または1つ以上の原子を通じて、全長抗TNFα抗体の残渣に共有結合している水溶性ポリマーを含むことを特徴とする複合体。
- 直接または1つ以上の原子を通じて、抗TNFα抗体の残渣に共有結合した水溶性ポリマーを含む複合体であって、前記水溶性ポリマーは、直接または1つ以上の原子を通じて、前記抗TNFα抗体内のシステインに共有結合しないことを特徴とする複合体。
- 前記抗TNFα抗体は、抗TNFα抗体断片の形態であることを特徴とする請求項2乃至4のいずれか1項に記載の複合体。
- 前記抗TNFα抗体は、全長抗TNFα抗体の形態であることを特徴とする請求項2乃至4のいずれか1項に記載の複合体。
- 前記水溶性ポリマーは、分岐していることを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記水溶性ポリマーは、線状であることを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記抗TNFα抗体は、二量体または三量体でないことを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記抗TNFα抗体は、一価であることを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記抗TNFα抗体は、CDR移植されないことを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記抗TNFα抗体は、ガラクトシル化またはグリコシル化されないことを特徴とする請求項1乃至4のいずれか1項に記載の複合体。
- 前記水溶性ポリマーは、ポリ(エチレングリコール)であることを特徴とする請求項1乃至12のいずれか1項に記載の複合体。
- 前記ポリ(エチレングリコール)は、メトキシで末端封止されていることを特徴とする請求項15に記載の複合体。
- 前記ポリ(エチレングリコール)は、約6,000ダルトン〜約100,000ダルトンの範囲の重量平均分子量を有することを特徴とする請求項16に記載の複合体。
- 前記ポリ(エチレングリコール)は、約10,000ダルトン〜約85,000ダルトンの範囲の重量平均分子量を有することを特徴とする請求項17に記載の複合体。
- 前記ポリ(エチレングリコール)は、約20,000ダルトン〜約65,000ダルトンの範囲の重量平均分子量を有することを特徴とする請求項18に記載の複合体。
- 前記抗TNFα抗体は、インフリキシマブまたはアダリムマブのいずれかであることを特徴とする請求項1乃至4および6〜12のいずれか1項に記載の複合体。
- 請求項1乃至20のいずれか1項に記載の複合体と、薬学的に許容しうる賦形剤と、を含むことを特徴とする組成物。
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CA2648582C (en) | 2006-04-07 | 2016-12-06 | Nektar Therapeutics Al, Corporation | Conjugates of an anti-tnf-alpha antibody |
IL226267B (en) | 2010-11-12 | 2022-09-01 | Nektar Therapeutics | Conjugates of an il-2 moiety and a polymer, compositions comprising the same and uses thereof |
AU2016335860B2 (en) | 2015-10-08 | 2023-08-10 | Nektar Therapeutics | Combination of an IL-2Rbeta-selective agonist and a long-acting IL-15 agonist |
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PE20201286A1 (es) | 2017-12-01 | 2020-11-24 | Abbvie Inc | Agonista del receptor de glucocorticoides e inmunoconjugados de este |
KR20230159299A (ko) * | 2022-05-12 | 2023-11-21 | 가톨릭대학교 산학협력단 | 자가면역질환 치료용 항체의 치료 효과 개선을 위한 폴리프로필렌옥사이드가 포함된 고분자 기반 접합체 |
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EP2004231A2 (en) | 2008-12-24 |
WO2007117685A2 (en) | 2007-10-18 |
US9101670B2 (en) | 2015-08-11 |
US10232042B2 (en) | 2019-03-19 |
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CA2648582C (en) | 2016-12-06 |
EP2004231A4 (en) | 2013-07-10 |
CA2648582A1 (en) | 2007-10-18 |
WO2007117685A3 (en) | 2008-10-02 |
US20160030587A1 (en) | 2016-02-04 |
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