JP6761889B1 - 抗ヒトCripto−1抗体 - Google Patents
抗ヒトCripto−1抗体 Download PDFInfo
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- JP6761889B1 JP6761889B1 JP2019204019A JP2019204019A JP6761889B1 JP 6761889 B1 JP6761889 B1 JP 6761889B1 JP 2019204019 A JP2019204019 A JP 2019204019A JP 2019204019 A JP2019204019 A JP 2019204019A JP 6761889 B1 JP6761889 B1 JP 6761889B1
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Abstract
Description
I―1 ヒトCripto−1の細胞外ドメインを特異的に認識する、ヒト由来抗ヒトCripto−1モノクローナル抗体であって、
(A) 配列番号1に示すアミノ酸配列、
(B) (A)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列、
(C) 配列番号2に示すアミノ酸配列、及び
(D) (C)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列、
の何れかに示すアミノ酸配列からなる重鎖CDR1、
(E) 配列番号3に示すアミノ酸配列、又は
(F) (E)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列
(G) 配列番号4に示すアミノ酸配列、及び
(H) (G)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列、
の何れかに示すアミノ酸配列からなる重鎖CDR2、
(I) 配列番号7に示すアミノ酸配列、又は
(J) (I)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列からなる軽鎖CDR1、並びに
(K) 配列番号8に示すアミノ酸配列、又は
(L) (K)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列からなる軽鎖CDR2、
からなる群より選択される少なくとも一つのCDRを含有する抗体。
(M) 配列番号5に示すアミノ酸配列、若しくは
(N) (N)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、或いは付加されたアミノ酸配列からなる重鎖CDR3及び/又は
(O) 配列番号9に示すアミノ酸配列、若しくは
(P) (O)のアミノ酸配列において、1〜3個のアミノ酸残基が、置換、欠失、或いは付加されたアミノ酸配列からなる軽鎖CDR3
を含有する抗体である、I−1又はI−2に記載する抗体。
(R) (Q)のアミノ酸配列において、1〜50個のアミノ酸残基が、置換、欠失、或いは付加されたアミノ酸配列からなる重鎖可変領域、及び/又は
(S) 配列番号10に示すアミノ酸配列、若しくは
(T) (S)のアミノ酸配列において、1〜50個のアミノ酸残基が、置換、欠失、或いは付加されたアミノ酸配列からなる
軽鎖可変領域を含有する、I−1〜I−3の何れかに記載する抗体。
II−1 上記I−1〜I−11の何れかに記載する抗体をコードするポリヌクレオチド。
III−1 上記I−1〜I−11の何れかに記載する抗体を産生する細胞。
IV―1 上記I―1〜I―11の何れかに記載する抗体を含有する飲食品組成物。
V―1 上記I―1〜I―11の何れかに記載する抗体を含有する医薬組成物。
VI―1 ガンの罹患に対して予防を所望する生体に、上記I−1〜I〜11の何れかに記載する抗体を投与する工程を含む、ガンの予防方法。
本発明の抗体は、ヒト由来であり、且つ、ヒトCripto−1の細胞外領域を特異的に認識するモノクローナル抗体である。本発明の抗体がヒトCripto−1を特異的に認識することは、ヒトCripto−1のホモログ又はオルソログがヒトCripto−1と同一の系内に存在する状況下において、本発明の抗体が、ヒトCripto−1のホモログ又はオルソログを認識しないこと(ヒトCripto−1を選択的に認識すること)を意味しているのではなく、これらのホモログ又はオルソログより、ヒトCripto−1を、より強く認識すること、または、これらのホモログ又はオルソログに対する親和性より、ヒトCripto−1に対する親和性のほうが高いことを意味する。したがって、本発明にて使用する「特異的」との用語は、「選択的」との意味とは全く異なって理解される。
本発明の抗体に含有される重鎖CDR1は、以下の(A)〜(D)の何れかに示すアミノ酸配列からなる。
(B) (A)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(C)配列番号2に示すアミノ酸配列。
(D) (C)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
本発明の抗体に含有される重鎖CDR2は、以下の(E)〜(H)の何れかに示すアミノ酸配列からなる。
(F) (E)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(G) 配列番号4に示すアミノ酸配列。
(H) (G)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
本発明の抗体に含有される軽鎖CDR1は、以下の(I)又は(J)に示すアミノ酸配列からなる。
(J) (I)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
本発明の抗体に含有される軽鎖CDR2は、以下の(K)又は(L)に示すアミノ酸配列からなる。
(L) (L)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(N) (M)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(P) (O)のアミノ酸配列において、1〜3個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(R) (Q)に示すアミノ酸配列において、1〜50個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
(T) (O)のアミノ酸配列において、1〜50個のアミノ酸残基が置換、欠失、又は付加されたアミノ酸配列。
本発明のポリヌクレオチドは、上記する本発明の抗体をコードする塩基配列を有するポリヌクレオチドである。このようなポリヌクレオチドは、特に限定されない。例えば、デオキシリボヌクレオチド、リボヌクレオチド、核酸ペプチド、又はこれらの公知の修飾物であってもい。このようなポリヌクレオチドは、一本鎖の形状であっても、二本鎖の形状であってもよい。
本発明の細胞は、上記する本発明の抗体を産生する細胞である。このような抗体の産生は、細胞内での産生であってもよいし、細胞外の産生(分泌産生)であってもよい。
本発明の飲食品組成物に含有される有効成分は、上記するヒトCripto−1の細胞外領域を特異的に認識する、ヒト由来抗ヒトCripto−1モノクローナル抗体である。
本発明の医薬組成物に含有される有効成分は、上記するヒトCripto−1の細胞外ドメインを特異的に認識する、ヒト由来抗ヒトCripto−1モノクローナル抗体である。
本発明の予防方法は、ガンの罹患に対して予防を所望する生体に、ヒトCripto−1の細胞外領域を特異的に認識する、ヒト由来抗ヒトモノクローナル抗体を投与する工程を含む、ガンの予防方法である。
ヒトCripto−1の細胞外ドメインを特異的に認識する抗体を、ファージ提示型ヒト抗体ライブラリーから、スクリーニングした。このようなヒトCripto−1の細胞外ドメインは、配列番号11に示すアミノ酸配列からなり、そのN末端側に、配列番号12に示すアミノ酸配列からなるHisタグ配列が設けられている。Alam.et.al.Int J Mol Sci.2018,26;19(11)に記載の方法に従って、可溶化型として調製した。スクリーニング対象として使用した抗体ライブラリーは、(Sakai,K.,et.al.Biochemistry46(1):253-62)に記載された抗体ライブラリーであり、斯かる抗体のサブクラスはIgGである。
上記する#35クローン抗体の培養上清を採取し、これをリン酸緩衝液で25倍に希釈し、さらに2倍毎の連続希釈を行った。これを96ウェルプレートに添加し、各ウェルに吸着したIgG分子(ヒト由来抗ヒトCripto−1抗体)を、HRP標識抗ヒトIgGヤギ抗体(Abcam社製)によって検出した。その結果を図2に示す。
ヒト癌組織アレイ(US Bioma社製BCN801)に対して、免疫染色を行った。一次抗体として、上記する#35クローンを用いた。2次抗体として、ALEXA568標識抗ヒトIgGヤギ抗体(Invitrogen社製)を用いて、各ガン組織(膵臓ガン組織、甲状腺ガン組織、前立腺ガン組織、胃ガン組織、子宮頸ガン組織、大腸ガン組織、及び乳ガン組織)におけるヒトCripto−1の検出を行った。これらのガン組織には、ガン細胞と共にガン幹細胞も含まれ、斯かるガン幹細胞の細胞膜表面上に、Cripto−1がGPIアンカーで結合していると考えられる。陰性対照実験として、上記2次抗体のみを用いてシグナルのバックグラウンドの確認を行った。これらの結果を、図3〜5に示す。
ガン幹細胞の増殖に対する効果は、3−(4,5−dimethylthiazol−2−yl)−2,5−diphenyltetrazolium bromide(MTT)を用いて評価した。ここでガン幹細胞として使用したU251MG SC1細胞は、以下に示す方法によって作製した。
Claims (12)
- ヒトCripto−1の細胞外ドメインを特異的に認識する、ヒト由来抗ヒトCripto−1モノクローナル抗体であって、
(A)配列番号1に示すアミノ酸配列又は(C)配列番号2に示すアミノ酸配列からなる、重鎖CDR1、
(E)配列番号3に示すアミノ酸配列又は(G)配列番号4に示すアミノ酸配列からなる、重鎖CDR2、
(I)配列番号7に示すアミノ酸配列からなる、軽鎖CDR1、
(K)配列番号8に示すアミノ酸配列からなる、軽鎖CDR2、
(M)配列番号5に示すアミノ酸配列からなる、重鎖CDR3、及び
(O)配列番号9に示すアミノ酸配列からなる、軽鎖CDR3、
を含有する抗体。 - (Q)配列番号6に示すアミノ酸配列、又は
(R)(Q)のアミノ酸配列において、FRに存在する1〜50個のアミノ酸残基が、置換、欠失、若しくは付加されたアミノ酸配列からなる重鎖可変領域、並びに
(S)配列番号10に示すアミノ酸配列、又は
(T)(S)のアミノ酸配列において、FRに存在する1〜50個のアミノ酸残基が、置
換、欠失、若しくは付加されたアミノ酸配列
からなる軽鎖可変領域
を含有する、請求項1に記載する抗体。 - Fv、scFv、ディアボディ、トリアボディ、テトラボディ、又はこれらを組み合わせた構造を有する抗体である、請求項1又は2に記載する抗体。
- 定常領域を含む抗体である、請求項1〜3の何れかに記載する抗体。
- イムノグロブリン、Fab、F(ab’)2、ミニボディ、scFv−Fc、又はこれらを組み合わせた構造を有する抗体である、請求項4に記載する抗体。
- 細胞障害活性を有する抗体である、請求項1〜5の何れかに記載する抗体。
- 細胞障害活性が、ADCC活性、CDC活性、及びADCPの何れかの活性である、請求項6に記載する抗体。
- サイトトキシンが結合する抗体である、請求項1〜7の何れかに記載する抗体。
- 請求項1〜8の何れかに記載する抗体をコードするポリヌクレオチド。
- 請求項1〜8の何れかに記載する抗体を産生する細胞。
- 請求項9に記載するポリヌクレオチドを保持する細胞。
- 請求項1〜8の何れかに記載する抗体を含有する医薬組成物。
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JP2019204019A JP6761889B1 (ja) | 2019-11-11 | 2019-11-11 | 抗ヒトCripto−1抗体 |
KR1020227018856A KR20220098172A (ko) | 2019-11-11 | 2020-11-10 | 항인간 cripto-1 항체 |
US17/775,706 US20220363777A1 (en) | 2019-11-11 | 2020-11-10 | Anti-human cripto-1 antibody |
CN202080078246.4A CN114729372A (zh) | 2019-11-11 | 2020-11-10 | 抗人Cripto-1抗体 |
PCT/JP2020/041801 WO2021095703A1 (ja) | 2019-11-11 | 2020-11-10 | 抗ヒトCripto-1抗体 |
EP20888504.6A EP4059519A1 (en) | 2019-11-11 | 2020-11-10 | Anti-human cripto-1 antibody |
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JP2019204019A JP6761889B1 (ja) | 2019-11-11 | 2019-11-11 | 抗ヒトCripto−1抗体 |
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EP (1) | EP4059519A1 (ja) |
JP (1) | JP6761889B1 (ja) |
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TWI710573B (zh) * | 2015-01-26 | 2020-11-21 | 美商再生元醫藥公司 | 抗伊波拉病毒醣蛋白之人類抗體 |
SG10202005268WA (en) * | 2015-12-04 | 2020-07-29 | Memorial Sloan Kettering Cancer Center | Antibodies targeting fc receptor-like 5 and methods of use |
WO2017192589A1 (en) * | 2016-05-02 | 2017-11-09 | The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | Neutralizing antibodies to influenza ha and their use and identification |
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US20220363777A1 (en) | 2022-11-17 |
KR20220098172A (ko) | 2022-07-11 |
JP2021073927A (ja) | 2021-05-20 |
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