JP4652807B2 - アンギオテンシンiiタイプ1レセプターに対するモノクローナル抗体の治療的使用方法 - Google Patents
アンギオテンシンiiタイプ1レセプターに対するモノクローナル抗体の治療的使用方法 Download PDFInfo
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Description
または、次のようにも表される。
現在では、驚いたことにアンギオテンシンIIタイプ1レセプターのN末端配列を含むペプチド配列に対するモノクローナル抗体が以前にはそのような用途について示唆も実証もされなかった一部の医学的状態におけるさらなる治療用途を持つことが明らかになっている。さらに、これらの治療効果は、アンギオテンシンIIの有益な作用は保持しつつ、関連する医学的状態におけるこの分子の有害作用を遮断するモノクローナル抗体の能力に見られる。現在では、N末端配列全体の機能的に重要な役割が認識されている。
MILNSSTEDG IKRIQDDCPK AGRHNYIFVM IPTLYSIIFV VGIFG
によって定義されるアンギオテンシンIIタイプ1レセプターのN末端部分を含むペプチドまたはその断片に対するモノクローナル抗体またはその断片の使用法が提供される。
本明細書で用いられるように、「ペプチド」という用語はオリゴペプチドまたはポリペプチドを含み、これらの用語は互換的に使用することができる。
を持つペプチド配列またはその活性断片および/もしくはその保存的変異型に対するモノクローナル抗体の使用を内包する。この配列はラットアンギオテンシンIIタイプ1レセプター配列、残基8〜17に由来する。この断片における保存的置換は、Eに対するD、Dに対するE、Gに対するA、Iに対するL、Kに対するR、Rに対するK、Qに対するN、またはこれらの任意の組み合わせである。
は、ヒト、チンパンジー、マウス(AT1b)および(AT1b)、ウシ、イヌ、ヒツジ、ウサギ、およびラット(AT1b)の種間で完全に100%保存される。変異は残基8に見られて、モルモットの場合はQであり、ラット(AT1a)ではDであり、スナネズミではDである。N末端配列の1〜45の領域全体におけるこれらの種の配列相同性を図9に示す。
の構造を持ち、ここで次の残基はそれぞれ独立に次の通りであることができる:残基8はE、DまたはQであることが可能であり、残基9はDまたはE、残基10はGまたはA、残基11はIまたはA、残基12はKまたはR、残基13はRまたはK、残基14はIまたはA、残基15はQまたはN、残基16および17はぞれぞれDまたはEであることができる。
により示される。
上記のアンギオテンシンIIタイプ1レセプターのN末端配列残基1〜45、好ましくは8〜17のエピトープは、そのエピトープの全体的な形状および/または立体配座が依然抗原性であるようなアミノ酸の置換、および/または挿入、および/または欠失による修飾によって変化させることができる。
によって定義されるアンギオテンシンIIタイプ1レセプターのN末端部分を含むペプチドまたはその断片に対するモノクローナル抗体の、血管平滑筋(VSM)細胞増殖の治療のための医薬品の調製における使用法が提供される。
によって定義されるアンギオテンシンIIタイプ1レセプターのN末端部分を含むペプチド配列またはその断片を含むワクチン組成物が提供される。このワクチン組成物は、上記配列のポリペプチドまたは上記に定義されるような抗原性断片を含むことができ、任意にキャリアタンパク質に抱合される。このようなタンパク質またはペプチドに抗原性を付与する方法は、本発明の先の局面に関連して上記に定義される。例えば、ヒト血清アルブミン、ウシ血清アルブミン、およびオボアルブミンのようなアルブミンタンパク質。または、キーホールリンペットタンパク質(時に、キーホールリンペットヘモシアニンと呼ばれることもある)を用いることができる。このキャリアは一般に、断片の元となる動物とは別の種に由来する。このワクチン組成物には、例えばキラジャ(Quillaja)サポニンまたはその誘導体のようなサポニンアジュバントなどのその他のアジュバントをさらに加えることができる。
(1)任意に静脈内注射用のような薬学的に許容される適切なアジュバントおよび/または希釈剤中のキャリアペプチドまたはタンパク質に抱合される、上記に定義されるようなアンギオテンシンIIタイプ1レセプターのN末端部分を含むペプチドに対するモノクローナル抗体またはその断片を調製する工程
(2)任意に(1)のモノクローナル抗体調製物をリポソームまたは腸溶性コーティングカプセル調製剤としてさらに調製する工程
(3)(2)または(3)の調製物をインビトロにおける癌細胞集団または癌患者に投与する工程。
テトラゾリウム塩である臭化3-(4,5-ジメチルチアゾル-2-イル)-2,5-ジフェニルテトラゾリウム(MTT)は細胞酸化的代謝活性の指示薬として広く用いられる。MTTは還元されると強く着色したホルマザン産物を形成して、これは比色法によって測定することが可能であり、従ってしばしば細胞の生存度および増殖の定量的評価に用いられる。
ASMCは、ラットの胸部および腹部動脈(RASMC)ならびにウシ大動脈(BASMC)から培地外植法によって単離して、数回、継代培養した。ラットの腹部および胸部大動脈の一部は、屠殺したラットから慎重に摘出して得た。子ウシの大動脈の一部は麻酔下にて得た。大動脈の一部を、組織培養培地を含むディプレッションスライドガラスに載せた後、解剖顕微鏡下において各組織片の外膜および外層部分を慎重に除去した。組織の残りの内側部分および内膜を別々の解剖用シャーレに回収して、新鮮な培養培地で数回洗浄した。この時点で、各組織片を約1mm四方に刻んで、25cm2組織培養フラスコに入れた。このフラスコに軽くキャップを被せて、加湿したCO2インキュベーターに収容した。2時間後、組織を剥離しないように、フラスコに100単位/mlペニシリン、100μg/mlストレプトマイシン、4μmol/L L-グルタミン、および20%FBSを添加したRPMI-1640培養培地の4mlを慎重に加えた。1週間後、試料に新鮮な培地を加えた。外植片に由来する細胞は、約2週間の期間中に比較的コンフルエントであった。続いて、それらをPBSですすいだ後、0.125%トリプシンおよび0.02%EDTAのPBS溶液を加えて37℃で1〜2分間、トリプシン処理した。得られた細胞懸濁液を、培養培地10mlを含む75cm2組織培養フラスコにピペットで分取して、上記の通りインキュベートした。実験は、3〜5回継代した細胞を用いて実施した。
MCF-7細胞(アメリカンタイプカルチャーコレクション(ATCC), Manassas, VA 20108, USAから入手)を24穴プレートにウェル当たり細胞5000個の密度で播種して、5%ウシ胎児血清(FBS)を含むEagles最小必須培地(MEM)で24時間培養した。続いて、細胞を無血清培地でさらに24時間インキュベートした。この後、細胞を、無血清培地単独(対照ウェル)、またはアンギオテンシンII単独(1〜10nM)もしくは抗体6313/G2を併用した実験ウェルに無血清培地を加えたいずれかにて培養した。各処理は四連にて実施した。その後、細胞を24時間培養した。20時間後に各ウェルにトリチウムチミジンを加えて(Amersham Pharmacia Biotech, Amersham, UK, 50μCi/ml、比活性5Ci/mmol)、細胞をさらに4時間培養した。この期間の終了時に培地を吸引して、培養した細胞を氷冷緩衝液(50mM Tris-HCl、pH 7.4)で3回洗った。次に、細胞を0.1N NaOH 1mlに溶解して、この溶液の0.5mlをシンチレーションカクテル(トルエンシンチレーター、Packard Bioscience B. V. Groningen, Netherlands)の3.5mlと混合して、トリチウム含有量をアッセイした。
細胞外マトリックスタンパク質におけるMCF-7細胞の細胞接着アッセイを実施して検討した。96穴(平底)細胞培養プレートを段階的な量の精製ヒトマトリックスタンパク質であるコラーゲンタイプIV(50μg/ウェル)でコーティングした。プレートは、蒸発させるために室温にて層流キャビネットに入れて一晩放置した。
細胞外マトリックスタンパク質に対するMCF-7細胞の化学浸潤アッセイを実施して検討した。8μmフィルター挿入物を精製ヒトコラーゲンタイプIVマトリックスタンパク質でコーティングして、室温で乾燥させるために層流キャビネット内に一晩放置した。MCF-7細胞を6163/G2抗体(ハイブリドーマ上清)で48時間処理した。対照の細胞は無処理とした。
インテグリン発現に対する抗体6313/G2の影響を調べた。結果は、抗体6313が乳癌細胞におけるインテグリンα3およびβ1の発現を著しく抑制することを示す。
MCF-7細胞およびRASMCにおけるカルシウム応答に対する抗体6313の影響について調べた。抗体6313は双方においてカルシウム応答を刺激することが明らかとなった。
Claims (2)
- 癌の治療のための医薬品の調製における、ペプチドEDGIKRIQDDに対するモノクローナル抗体の使用。
- モノクローナル抗体がEuropean Collection of Animal Cell Cultures (ECACC)に寄託されたアクセッション番号93072117とされるハイブリドーマセルラインにより産生される6313/G2である、請求項1記載の使用。
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2002
- 2002-08-21 GB GBGB0219524.6A patent/GB0219524D0/en not_active Ceased
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2003
- 2003-08-21 DK DK03792528.6T patent/DK1534750T3/da active
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- 2003-08-21 CN CN201010167267A patent/CN101837124A/zh active Pending
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- 2003-08-21 US US10/525,277 patent/US7951904B2/en not_active Expired - Fee Related
- 2003-08-21 AU AU2003263294A patent/AU2003263294A1/en not_active Abandoned
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09509563A (ja) * | 1993-09-27 | 1997-09-30 | クイーン・メアリー・アンド・ウエストフィールド・カレッジ | タイプ▲i▼アンギオテンシン▲ii▼レセプター特異的モノクローナル抗体及びハイブリドーマ |
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WO2004018519A3 (en) | 2004-06-03 |
JP2010106035A (ja) | 2010-05-13 |
AU2003263294A1 (en) | 2004-03-11 |
ES2713057T3 (es) | 2019-05-17 |
US20110256139A1 (en) | 2011-10-20 |
JP5208975B2 (ja) | 2013-06-12 |
ATE554102T1 (de) | 2012-05-15 |
US20130202604A1 (en) | 2013-08-08 |
CN101837124A (zh) | 2010-09-22 |
DK1534750T3 (da) | 2012-07-23 |
WO2004018519A2 (en) | 2004-03-04 |
US20060034839A1 (en) | 2006-02-16 |
EP2228390A1 (en) | 2010-09-15 |
CA2496422C (en) | 2013-06-25 |
US7951904B2 (en) | 2011-05-31 |
EP1534750A2 (en) | 2005-06-01 |
EP2228390B1 (en) | 2018-12-19 |
CA2496422A1 (en) | 2004-03-04 |
JP2006513982A (ja) | 2006-04-27 |
US8383108B2 (en) | 2013-02-26 |
CN1681845B (zh) | 2011-08-17 |
CN1681845A (zh) | 2005-10-12 |
GB0219524D0 (en) | 2002-10-02 |
EP1534750B1 (en) | 2012-04-18 |
ES2385976T3 (es) | 2012-08-06 |
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