JP2009539383A - 安定化されたインスリン様増殖因子ポリペプチド - Google Patents
安定化されたインスリン様増殖因子ポリペプチド Download PDFInfo
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- JP2009539383A JP2009539383A JP2009514507A JP2009514507A JP2009539383A JP 2009539383 A JP2009539383 A JP 2009539383A JP 2009514507 A JP2009514507 A JP 2009514507A JP 2009514507 A JP2009514507 A JP 2009514507A JP 2009539383 A JP2009539383 A JP 2009539383A
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Abstract
Description
インスリン様増殖因子(IGF)は、細胞がその生理学的環境との間で情報伝達を行う際に使用する複雑な系の一部である。この複雑な系(インスリン様増殖因子軸と称されることが多い)は、2種の細胞表面受容体(IGF−1RおよびIGF−2R)、2種のリガンド(IGF−1およびIGF−2)、6種の高親和力IGF結合タンパク質(IGFBP1−6)のファミリー、および関連IGFBP分解酵素(プロテアーゼ)により構成される。この系は、正常な生理機能の調節だけでなく多くの病的状態にとっても重要である(Glass、Nat Cell Biol 5:87−90、2003)。
本発明は、実質的にそのE−ペプチドを含む前駆体IGF−1またはIGF−2タンパク質が生物活性を呈し、血清の存在下では安定化されることから、医薬として有用なIGF−1またはIGF−2ポリペプチドが得られるという発見に基づいている。本発明組成物では、IGF−1からのE−ペプチドの正常な開裂が、例えばE−ペプチドの1位のアルギニンまたは2位のセリン(野生型前駆体IGF−1の71および72位に相当)の突然変異または欠失により回避される。IGF−2では、例えばE−ペプチドの1位のアルギニンまたは2位のアスパラギン酸(野生型前駆体IGF−2の68および69位に相当)の突然変異または欠失により開裂が回避される。IGF前駆体タンパク質の他の修飾もこの開裂を回避または減少させ得る。
本発明は、E−ペプチドからの活性IGF−1またはIGF−2の放出の誘因である典型的なプロテアーゼ開裂を阻止、低減化または回避するように実質的に修飾が加えられたE−ペプチドを含む新規IGF−1およびIGF−2前駆体ポリペプチドに関するものである。本発明ポリペプチドの有用性は、前駆体ポリペプチドが生物活性を呈し、安定し、かつ医薬として有益であるという驚くべき発見に基づいている。
本発明ポリペプチドの有用性は、以下の検定法を用いて評価され得る。
安定性 本発明ポリペプチドが有効な薬剤であるためには、内在性プロテアーゼの存在下、例えばヒト血清中において十分な安定性を有すべきである。安定性を評価するため、ポリペプチドをコード化する発現ベクターは、10%胎児ウシ血清、100U/mlペニシリンおよび100μg/mlストレプトマイシンを含むDMEM培地中のCos7細胞(ATCC)へトランスフェクションされ得る。分泌されたポリペプチドを含む培養培地は、さらなる分析に適用され得るか、または別法として、発現ベクターがポリペプチドにおいて容易に利用可能な標識、例えばヘキサ−ヒスチジン標識をコード化することにより、Cos7培地中で発現されたポリペプチドの有効な精製を容易に行うことができる。しかしながら、調製したポリペプチド試料を、様々な期間(例、0、1、5、10および16時間)正常ヒト血清(Sigma)またはPBS中でインキュベーションし、ポリアクリルアミドゲル電気泳動にかけ、ニトロセルロースにブロッティングし、関連性のあるタンパク質を、ヒトIGF−1またはIGF−2に対する一次抗体および例えばホースラディッシュペルオキシダーゼで標識した二次抗体を用いて視覚化する。場合によっては蛍光染料または放射性核種を用い、かなり多数の類似したブロッティングおよび検出技術が使用され得る。前駆体バンドの強度対IGF−1またはIGF−2バンドの強度は、前駆体ポリペプチドが様々な条件下で開裂される場合の程度を示すことになる。37℃で16時間ヒト血清に暴露された本発明ポリペプチドは、約1:2〜1:0.1、例えば約1:1〜1:0.5の未開裂前駆体対開裂成熟IGFの比、特に約1:1の比率または約1:0.5の比率を呈し得る。典型的には、前駆体は少なくとも1:1の比を呈する。
当業界で公知の一モデルは、ユーザー可変負荷による自発走用ランニングホイールの使用に基づいている(例、Konhilas et al., Am J Physiol Heart Circ Physiol 289:H455−H465、2005参照)。自発走用ケージホイールは、運動強制モデルに共通する肉体的および心理的傷害を排除するため、筋肉量の増加が望まれる比較的健康な個体で使用される候補薬剤を評価するのにより適している。
クレンブテロールは、筋量の増加誘発が立証された成長促進特性をもつβ2−アドレナリン作用性アゴニストである。クレンブテロールの正確な作用機序は依然として不明瞭であるが、筋肉タンパク質分解の低減化が提案されている。臨床では、クレンブテロールは抗喘息薬として使用されるが、たいていはヒトおよび展示動物の両方で筋量を増加させる筋肉増強剤として誤用されていると思われる。
マウスにおける薬理学的筋肉消耗誘導方法では、20mg/kgのデキサメタゾンによる腹腔内注射を毎日行う。デキサメタゾンは、グルココルチコイド類のホルモンの合成構成員である。それは、抗炎症および免疫抑制剤として作用し、ヒドロコルチゾンの約40倍の効力をもつ。デキサメタゾンを用いて、多くの炎症および自己免疫状態、例えば慢性関節リウマチを処置する。また、それは、化学療法を受けている癌患者にも投与され、抗癌治療のある種の副作用を打ち消す。デキサメタゾンは、マウスおよびヒト患者の両方において筋委縮を誘発する。
様々な筋肉群を物理的に使わないと、それらの筋肉は萎縮する。足根関節固定(「踵固定」またはギプス固定)は、ラットおよびマウスの後脚筋系の物理的固定を誘導する非常に有用かつ再現性のある方法であることがわかった。
一般には、除神経するためイソフルオランガスでマウスに麻酔をかける。無菌手術手順(ベタジンで3回洗浄、最後にエタノール洗浄)を用いて、右坐骨神経を大腿中間部で分離し、2〜5mm片を切り取る。反対側の足を対照として用いる。
遺伝子操作を加えたトランスジェニックマウスは、筋委縮モデルとしても使用され得る。例えば、いわゆるミニマウス(The Jackson Laboratory、ストック番号003258)は、IGF−1遺伝子に生後の成長の異常な低下並びに低体重および体格をもたらすノックアウト突然変異を含む。追加的情報については、Powell-Braxton et al., Genes Dev 7:2609−2617(1993)参照。さらに、いわゆるミディマウス(The Jackson Laboratory、ストック番号003259)は、低成体体重を呈する矮小体型および他の心臓血管表現型をもたらす異なる突然変異をIGF−1遺伝子に含む。追加的情報については、Lembo et al., J Clin Invest 98:2648−2655(1996)参照。
「決定的突然変異」 本発明は、一つには実質的にそのE−ペプチドを含むIGF前駆体ポリペプチドが血清の存在下では生物活性および安定性を残しているという観察に基づいている。E−ペプチドが、二塩基性プロテアーゼ部位をターゲッティングする内在性プロテアーゼにより開裂されないことを確認するため、一般には前駆体におけるE−ペプチドの2個のN−末端二塩基性アミノ酸のいずれか一方が欠失、突然変異導入または他の方法で遮蔽され得る。hIGF−1の場合、これら2個のアミノ酸はR71およびS72であり、hIGF−2の場合、初めのこれら2個のアミノ酸はR68およびD69である。
(1)一方または両方の二塩基性残基の欠失
(2)一または両二塩基性残基の非塩基性アミノ酸、例えばアラニンへの突然変異
(3)二塩基性残基間における1個またはそれ以上の非塩基性アミノ酸の挿入
(4)プロテアーゼ部位の遮蔽に十分な形で二塩基性残基付近にグリコシル化部位を配置
(5)下記要領による、いずれかの二塩基性残基の置換、または二塩基性残基の付近またはその間における非天然アミノ酸挿入を用いる位置指定ペギル化。
適応症 本発明はまた、筋骨格疾患の処置または予防用の医薬の製造における本発明IGF前駆体ポリペプチドの使用を含む。さらに、本発明は、個体が筋骨格疾患の危険に直面しているかまたはそれに罹患している場合であれ、そうでない場合であれ、上記個体において筋肉または骨量を増加させるためのIGF前駆体ポリペプチドの使用を包含するものである。
(i)動物における成長の速度および/または範囲の向上、例えばブタ、ウシ、家禽および魚類における筋肉成長の促進;
(ii)例えば、ブタ、ウシ、ヒツジ、家禽および魚類における体組織への飼料の変換効率(赤身肉対脂肉比)の向上;および
(iii)泌乳動物、例えば乳牛、ヒツジ、ヤギにおける乳生産の向上。
他の獣医学的治療適用例には、以下のものがあるが、これらに限定されるわけではない:
(iv)例えばイヌ、ネコおよびウマといった伴侶動物における、悪液質、外傷または他の消耗性疾患に伴う動物の消耗的症状の処置、および
(v)新生児の健康状態を改善するための泌乳動物の処置、例えば新生児の能力を改善するための泌乳雌豚の処置。
前記のヒトにおける投与方法に加えて、さらに獣医学的投与についても考察を進める。
以下、実施例により本発明についてさらに説明するが、限定するものではない。
以下の修飾を含むhIGF−1−Ea前駆体ポリペプチドをコード化するDNA発現ベクターを構築した:G1の欠失、P2の欠失、およびE3の欠失;R37のAへの突然変異;およびR71の欠失およびS72の欠失。これらの突然変異は、本開示全体を通して「3mut」と称される場合もある。この結果、以下の分泌タンパク質配列がもたらされる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm(配列番号8)
以下の突然変異を含むhIGF−1−Eb前駆体ポリペプチドをコード化するDNA発現ベクターを構築した:G1の欠失、P2の欠失、およびE3の欠失;R37のAへの突然変異;およびR71の欠失およびS72の欠失(すなわち、「3mut」)。この結果、以下の分泌タンパク質配列がもたらされる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk(配列番号9)
以下の突然変異を含むhIGF−1−Ec前駆体ポリペプチドをコード化するDNA発現ベクターを構築した:G1の欠失、P2の欠失、およびE3の欠失;R37のAへの突然変異;およびR71の欠失およびS72の欠失(すなわち、「3mut」)。この結果、以下の分泌タンパク質配列がもたらされる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk(配列番号10)
hIGF−1−Ebペプチドへの以下の修飾を含むhIGF−1−Eabキメラ前駆体ポリペプチドをコード化するDNA発現ベクターを構築した:G1の欠失、P2の欠失、およびE3の欠失;R37のAへの突然変異;R71の欠失およびS72の欠失(すなわち、「3mut」);およびEbのアミノ酸95と96の間におけるEaアミノ酸93〜102の挿入。この挿入により、N92において推定的N−結合グリコシル化シグナルが作成される。この結果、以下の分泌タンパク質配列がもたらされる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk(配列番号11)
以下の突然変異を含むhIGF−1−Ebマルチマー前駆体ポリペプチドをコード化するDNA発現ベクターを構築した:G1の欠失、P2の欠失、E3の欠失、R36の欠失、R37の欠失、R71の欠失、S72の欠失、Ebの最後の7個のC−末端アミノ酸の欠失、および両方ともR71およびS72および最後の7個のC−末端アミノ酸を伴わない2個の追加的EbペプチドおよびR71およびS72を伴わない第4かつ最終のEbペプチドの、この前駆体のC−末端への挿入。図6は、この構築物の概略図である。この結果、以下の分泌タンパク質配列がもたらされる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaersvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaersvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaersvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk(配列番号12)
図6Bに概略を示した本発明のhIGF−1−Eb前駆体ポリペプチドが発現され得る。この構築物は、以下の修飾を含む:G1の欠失、P2の欠失、E3の欠失、R36の欠失、R37の欠失、R71の欠失、S72の欠失、およびEbのアミノ酸95と96の間におけるEaアミノ酸93〜102の挿入。これによりN92およびN100位にN−結合グリコシル化部位が作成される。この結果、以下の分泌タンパク質配列が得られる:
tlcgaelvdalqfvcgdrgfyfnkptgygsssapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk(配列番号13)
以下の修飾を有する本発明のhIGF−2−E前駆体ポリペプチドが発現され得る:P4の欠失、S5の欠失、およびE6の欠失;R38のAへの突然変異;およびR68の欠失およびD69の欠失。この結果、以下の分泌タンパク質配列が得られる:
ayrtlcggelvdtlqfvcgdrgfyfsrpasrvsrasrgiveeccfrscdlalletycatpaksevstpptvlpdnfprypvgkffqydtwkqstqrlrrglpallrarrghvlakeleafreakrhrplialptqdpahggappemasnrk(配列番号14)
以下の突然変異を有する本発明のhIGF−1−Ea前駆体ポリペプチドが発現され得る:G1の欠失およびP2の欠失;E3のX(Xは、ペギル化された非天然アミノ酸である)への突然変異;R37のAへの突然変異;およびR71の欠失およびS72の欠失。この結果、以下の分泌タンパク質配列が得られる:
Xtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm(配列番号15)
9) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R36A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号16)
10) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R36A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号17)
10) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R36A; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号18)
11) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R37A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号19)
12) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R37A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号20)
13) hIGF-1-Ea: ΔG1, ΔP2, ΔE3, ΔR37; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号21)
14) hIGF-1-Ea: ΔG1, ΔP2, ΔE3, ΔR37; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号22)
15) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; ΔR37; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号23)
16) hIGF-1-Eb: ΔG1, ΔP2, ΔE3; R36A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号24)
17) hIGF-1-Eb: ΔG1, ΔP2, ΔE3; R36A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号25)
18) hIGF-1-Eb: ΔG1, ΔP2, ΔE3; R37A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号26)
19) hIGF-1-Eb: ΔG1, ΔP2, ΔE3; R37A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号27)
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号28)
21) hIGF-1-Eb: ΔG1, ΔP2, ΔE3, ΔR37; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号29)
22) hIGF-1-Eb: ΔG1, ΔP2, ΔE3, ΔR37; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号30)
23) hIGF-1-Eb: ΔG1, ΔP2, ΔE3, ΔR37; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号31)
24) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R36A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号32)
25) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R36A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号33)
26) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R36A; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号34)
27) hIGF-1-Ec: ΔG1, ΔP2, ΔE2; R37A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号35)
28) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R37A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号36)
29) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R37A; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号37)
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号38)
31) hIGF-1-Ec: ΔG1, ΔP2, ΔE3, ΔR37, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号39)
32) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R36A; ΔR71; Ebのアミノ酸95と96の間におけるEa アミノ酸93-102の挿入(すなわち"Eab")
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号40)
33) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R37A; ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号41)
34) hIGF-1-Eab: ΔG1, ΔP2, ΔE3, ΔR37, ΔR71
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksasvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号42)
35) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R36A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号43)
36) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R37A; ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号44)
37) hIGF-1-Eab: ΔG1, ΔP2, ΔE3, ΔR37, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksarvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号45)
38) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R36A; ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssarapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号46)
39) hIGF-1-Eab: ΔG1, ΔP2, ΔE3, ΔR37, ΔR71, ΔS72
tlcgaelvdalqfvcgdrgfyfnkptgygsssrapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号47)
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号48)
41) hIGF-1-Eb: ΔP2, ΔE3; R37A; ΔR71, ΔS72
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号49)
42) hIGF-1-Ebマルチマー: (ΔG1, ΔP2, ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号50)
43) hIGF-1-Ebマルチマー:(ΔP2, ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号51)
44) hIGF-1-Ec: ΔP2, ΔE3; R37A; ΔR71, ΔS72
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号52)
45) hIGF-1-Ea: ΔE3; R37A; ΔR71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号53)
46) hIGF-1-Eb: ΔE3; R37A; ΔR71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号54)
47) hIGF-1-Ebマルチマー:(ΔG1, ΔP2, ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号55)
48) hIGF-1-Ebマルチマー:(ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号56)
49) hIGF-1-Ec: ΔE3; R37A; ΔR71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号57)
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号58)
51) hIGF-1-Eb: ΔE3; R37A; ΔR71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号59)
52) hIGF-1-Ec: ΔE3; R37A; ΔR71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号60)
53) hIGF-1-Eab: ΔE3; R37A; Δ R71, ΔS72
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号61)
54) hIGF-1-Ebマルチマー: (ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
gptlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号62)
55) hIGF-1-Ea: E3A; R37A; ΔR71, ΔS72
gpatlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号63)
56) hIGF-1-Eb: E3A; R37A; ΔR71, ΔS72
gpatlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号64)
57) hIGF-1-Ec: E3A; R37A; ΔR71, ΔS72
gpatlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号65)
58) hIGF-1-Eab: E3A; R37A; ΔR71, ΔS72
gpatlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号66)
59) hIGF-1-Ebマルチマー:(E3A; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端7 aa)-Eb(ΔR71, ΔS72)
gpatlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号67)
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号68)
61) hIGF-1-Eb: ΔP2, ΔE3; R37A; ΔR71, ΔS72
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号69)
62) hIGF-1-Ec: ΔP2, ΔE3; R37A; ΔR71, ΔS72
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号181)
63) hIGF-1-Eab: ΔP2, ΔE3; R37A; ΔR71, ΔS72
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号70)
64) hIGF-1-Ebマルチマー:(ΔP2, ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
gtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号71)
65) hIGF-1-Eb: ΔG1, ΔP2; E3X; R37A; ΔR71, ΔS72
Xtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号72)
66) hIGF-1-Ec: ΔG1, ΔP2; E3X; R37A; ΔR71, ΔS72
Xtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号73)
67) hIGF-1-Eab: ΔG1, ΔP2; E3X; R37A; ΔR71, ΔS72
Xtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号74)
68) hIGF-1-Ebマルチマー:(ΔG1, ΔP2; E3X; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
Xtlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号75)
69) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R37A; ΔR71; S72X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksaXvraqrhtdmpktqkevhlknasrgsagnknyrm (配列番号76)
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksaXvraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号77)
71) hIGF-1-Ec: ΔG1, ΔP2, ΔE3; R37A; ΔR71; S72X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksaXvraqrhtdmpktqkyqppstnkntksqrrkgstfeerk (配列番号78)
72) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R37A; ΔR71; S72X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksaXvraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号79)
73) hIGF-1-Ebマルチマー:(ΔG1, ΔP2, ΔE3; R37A)-Eb(ΔR71; S72X;ΔC-末端 7 aa)-2xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72)
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpakXsavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaecrgkkgk (配列番号80)
74) hIGF-1-Ea: ΔG1, ΔP2, ΔE3; R37A; ΔR71, ΔS72; N92X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkevhlkXasrgsagnknyrm (配列番号81)
75) hIGF-1-Eb: ΔG1, ΔP2, ΔE3; R37A; ΔR71, ΔS72; C142X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaeXrgkkgk (配列番号82)
76) hIGF-1-Eab: ΔG1, ΔP2, ΔE3; R37A; ΔR71, ΔS72; C151X
tlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnknasrgsagnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaeXrgkkgk (配列番号83)
78) hIGF-1-Ebマルチマー(ΔG1, ΔP2, ΔE3; R37A)-3xEb(ΔR71, ΔS72, ΔC-末端 7 aa)-Eb(ΔR71, ΔS72; C71X)
TlcgaelvdalqfvcgdrgfyfnkptgygsssraapqtgivdeccfrscdlrrlemycaplkpaksavraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaevraqrhtdmpktqkyqppstnkntksqrrkgwpkthpggeqkegteaslqirgkkkeqrreigsrnaeXrgkkgk(配列番号84)
筋芽細胞増殖検定法は、IGF活性の信頼できるインビトロ指標を提供するため、胚筋芽細胞および成人サテライト細胞に影響を及ぼす因子に関するモデルとして使用される。この系で活性を示す因子は、筋芽細胞の一次培養物において類似した反応を示す。本発明ペプチドによりインビトロでの筋芽細胞増殖が促進されるということは、筋芽細胞増殖の増加、従って子宮内での終極筋原線維数の増加の誘発におけるその活性を示している。さらに、筋芽細胞増殖が同様に促進されるということは、この発明のペプチドを用いて、例えばサテライト筋肉細胞増殖の刺激により、成人筋肉肥厚が促進され得ることを示す。
泌乳動物では、乳を生産および分泌する細胞であることから、乳房上皮組織の量が乳生産における制限因子である。インビトロ系を用いて、動物の乳腺から得た上皮細胞を本発明の修飾IGF−1またはIGF−2で刺激することにより、乳成分の量を増産させることができる。さらに、上記インビトロ細胞系で増殖するように刺激を加えた乳房上皮細胞を、澄明にした乳房脂肪パッドに再移植して、刺激を加えることにより、泌乳中の雌動物において乳を増加および/または生産させ得ることが立証され得る。
一用量につき非経口投与されるペプチドの有効量は、用量応答曲線により測定され得る。例えば、本発明の修飾IGFペプチドを、処置すべき対象の血液または体液中で測定することにより、投与量が決定され得る。別法として、増加量のペプチドを対象に投与し、修飾IGF−1およびIGF−2について対象の血清レベルをチェックすることも可能である。ペプチドの使用量は、修飾IGF−1またはIGF−2のこれらの血清レベルに基づいてモル単位で計算され得る。
成体雄マウス(n=3/群)に、1mg/kgでのrhIGF−1および1.55mg/kgでのhIGF−1−Ec 3mut(実施例3に記載)の静脈内(i.v.)ボーラス注射を行った。血液試料を試験物質投与の5、15、30および60分後に採取した。rhIGF−1およびhIGF−1−Ec 3mutの血清濃度をELISAにより測定した。この検定法は、hIGF−1に特異的である。
Claims (26)
- プロテアーゼによるIGF−1からのE−ペプチドの開裂を、前駆体タンパク質の修飾により低減化する、ヒトIGF−1前駆体タンパク質を含むポリペプチド。
- 前駆体タンパク質がEaペプチドを含む、請求項1記載のポリペプチド。
- 前駆体タンパク質がEbペプチドを含む、請求項1記載のポリペプチド。
- Ebの最後の7個のC−末端アミノ酸が欠失している、請求項3記載のポリペプチド。
- 前駆体タンパク質がEcペプチドを含む、請求項1記載のポリペプチド。
- 前駆体タンパク質のG1が欠失または突然変異している、請求項1から5のいずれか1項記載のポリペプチド。
- 前駆体タンパク質のP2が欠失または突然変異している、請求項1から6のいずれか1項記載のポリペプチド。
- 前駆体タンパク質のE3が欠失または突然変異している、請求項1から7のいずれか1項記載のポリペプチド。
- 前駆体タンパク質のR36が欠失または突然変異している、請求項1から8のいずれか1項記載のポリペプチド。
- R36がアラニンに突然変異している、請求項1から9のいずれか1項記載のポリペプチド。
- 前駆体タンパク質のR37が欠失または突然変異している、請求項1から10のいずれか1項記載のポリペプチド。
- R37がアラニンに突然変異している、請求項1から11のいずれか1項記載のポリペプチド。
- さらに、N−結合グリコシル化共通配列NXS/Tを含む、請求項1から12のいずれか1項記載のポリペプチド。
- さらに、Ebのアミノ酸N95とT96の間に挿入されたEaのアミノ酸93〜102を含む、請求項3記載のポリペプチド。
- さらに、前駆体タンパク質のアミノ酸側鎖に共有結合しているオリゴ糖を含む、請求項1から14のいずれか1項記載のポリペプチド。
- オリゴ糖が、前駆体タンパク質のアルギニン側鎖に共有結合している、請求項15記載のポリペプチド。
- 前駆体タンパク質の残基が非天然アミノ酸により置換されている、請求項1から16のいずれか1項記載のポリペプチド。
- 非天然アミノ酸がアセチレンまたはアジド基を含む、請求項17記載のポリペプチド。
- さらに、前駆体タンパク質の側鎖に共有結合しているポリ(エチレングリコール)部分を含む、請求項1から18のいずれか1項記載のポリペプチド。
- さらに、前駆体タンパク質のC−末端に結合されたさらなるE−ペプチドを含む、請求項1から19のいずれか1項記載のポリペプチド。
- N−末端からC−末端まで、
第1Ebペプチド含むIGF−1前駆体タンパク質(ただし、G1、P1およびE1は欠失しており、R36およびR37は欠失しており、R71およびS72は欠失しており、第1Ebペプチドの最後の7個のC−末端アミノ酸は欠失している)、
第2Ebペプチド(ただし、R71、S72および第2Ebペプチドの最後の7個のC−末端アミノ酸は欠失している)、
第3Ebペプチド(ただし、R71、S72および第3Ebペプチドの最後の7個のC−末端アミノ酸は欠失している)、および
第4Ebペプチド(ただし、R71およびS72は欠失している)
を含むポリペプチド。 - 前駆体タンパク質のR71またはS72が欠失または突然変異している、請求項1から20のいずれか1項記載のポリペプチド。
- プロテアーゼによるIGF−2からのE−ペプチドの開裂を、前駆体タンパク質の修飾により低減化する、ヒトIGF−2前駆体タンパク質を含むポリペプチド。
- 前駆体タンパク質のR68またはD69が欠失または突然変異している、請求項23記載のポリペプチド。
- 筋骨格疾患、糖尿病、神経細胞死、または貧血の処置方法であって、対象に治療有効量の請求項1から24のいずれか1項記載のポリペプチドを投与することを含む方法。
- 筋骨格疾患、糖尿病、神経細胞死、または貧血の処置を目的とする医薬の製造における請求項1から24のいずれか1項記載のポリペプチドの使用。
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JP2011160696A (ja) * | 2010-02-08 | 2011-08-25 | Novartis Ag | 修飾ヒトigf−1/eペプチドに対する抗体 |
JP2016501025A (ja) * | 2012-12-18 | 2016-01-18 | ノバルティス アーゲー | 安定化されたインスリン様成長因子ポリペプチド |
JP2017502005A (ja) * | 2013-12-12 | 2017-01-19 | ノバルティス アーゲー | ペグ化タンパク質の組成物を調製するための方法 |
WO2023145961A1 (ja) * | 2022-01-31 | 2023-08-03 | 国立大学法人信州大学 | IGF1Rを標的とするpre-pro前駆体型キメラ抗原受容体発現細胞 |
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