JP5638628B2 - 持続型エリスロポエチン結合体の液剤 - Google Patents
持続型エリスロポエチン結合体の液剤 Download PDFInfo
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- JP5638628B2 JP5638628B2 JP2012549940A JP2012549940A JP5638628B2 JP 5638628 B2 JP5638628 B2 JP 5638628B2 JP 2012549940 A JP2012549940 A JP 2012549940A JP 2012549940 A JP2012549940 A JP 2012549940A JP 5638628 B2 JP5638628 B2 JP 5638628B2
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Description
持続型EPO結合体の製造
<1−1>免疫グロブリンを利用した免疫グロブリンFcフラグメントの製造
本実施例に有用な免疫グロブリンFcフラグメントは、ヒト非グリコシル化IgG4Fcフラグメントであり、韓国特許登録第725314号に記載された方法により大腸菌形質転換体から発現されたものである。
本実施例に使用されたヒトEP0は、韓国登録特許第880509号に記載された方法により得られた。このために、遺伝子の転写調節配列であるジヒドロ葉酸レダクターゼ(dihydrofolate reductase)遺伝子プロモータを人為的に弱体化させ、遺伝子の増幅効率を大きく改善できるベクターで形質転換された動物細胞株を利用してヒトEPOタンパク質を発現するように培養した。高グリコシル化されたタンパク質のみ精製して使用した。
本実施例における持続型EPO結合体は、ヒトエリスロポエチンと免疫グロブリンFcフラグメントを非ペプチドポリマーで共有結合して製造した。また、前記結合体は、韓国登録特許第725315号及び第775343号に記載された方法により得られた。
各種安定化剤による持続型EPO結合体の安定性評価
リン酸緩衝溶液存在下で、糖類、糖アルコール、多価アルコール及びアミノ酸が含まれる各種安定化剤における持続型EPO結合体の安定化能力を分析した。
塩による持続型EPO結合体の安定性評価
リン酸緩衝溶液の存在下で、各種塩の持続型EPO結合体を安定化する能力を分析するために下記実験を行った。アルカリ塩、無機塩などの塩は、pH緩衝剤として持続型結合体にさらなるpH安定性を付与するだけでなく、等張化剤として浸透圧を適切に維持する役割を果たす。
非イオン性界面活性剤による持続型EPO結合体の安定性評価
リン酸緩衝溶液の存在下で、各種非イオン性界面活性剤の持続型EPO結合体を安定化する能力を分析するために下記実験を行った。
持続型EPO結合体の液剤の比較(I)
保存安定性について、市販のEPO液剤であるロシュ社のレコルモン(Roche)を、本発明の持続型EPO結合体の液剤と比較した。レコルモンの組成は明らかでないが、緩衝溶液としてのリン酸ナトリウム、界面活性剤としてのポリソルベート20、塩としての塩化ナトリウム、並びに安定化物質としてのウレア、塩化カルシウム(CaCl)、グリシン(glycine)、ロイシン(leucine)、イソロイシン(isoleucine)、トレオニン(threonine)、グルタミン酸(glutamic acid)及びフェニルアラニン(phenylalanine)を含む。
持続型EPO結合体に保存安定性を付与する安定化剤の探索
持続型EPO結合体に長期間の保存安定性を付与する安定化剤を探索するために、持続型EPO結合体の液剤を下記表7の組成で製造した。これに関連して、グリシンとメチオニンをそれぞれ界面活性剤−塩化ナトリウム−マルトースの組成に添加して長期間の保存安定性に対するアミノ酸の影響を試験した。また、前記液剤において、EPOの濃度を10mMリン酸ナトリウム緩衝溶液(pH6.5)中で200μg/mlにした。
持続型EPO結合体の長期間の保存安定性に対するマンニトール及びマルトースの評価
実施例6で持続型EPO結合体の最も大きな安定性を示したマルトース−グリシンを含む液剤、同一条件でマルトースの代わりにマンニトールを含む液剤、及びマンニトールのみを含む液剤の3種類の液剤を下記表9のように製造した。これらの長期間の保存安定性を評価した。液剤において、EPOの濃度を10mMリン酸ナトリウム緩衝溶液(pH6.5)中で200μg/mlにした。
持続型EPO結合体の長期間の保存安定性に対する緩衝溶液の評価
緩衝溶液の持続型EP0結合体を安定化する能力について評価した。持続型EPO結合体の安定性と塩及び糖アルコールの容量の関係について試験するために下記実験を行った。
持続型EPO結合体の液剤の保存安定性の比較(II)
保存安定性について、実施例2〜8で安定化能力が証明された、リン酸緩衝溶液(pH6.5)、塩化ナトリウム、マンニトール及びポリソルベート80で製造された液剤を、市販のEPO液剤であるロシュ社のレコルモンと比較した。本発明の液剤とレコルモンの組成を下記表13に示す。これらを40℃で4週間保存し、持続型EPO結合体の液剤を保存中の2週間後及び4週間後に逆相クロマトグラフィーとサイズ排除クロマトグラフィーで分析した。結果を下記表14に示す。RP−HPLC(%)とSE−HPLC(%)は初期値に対する持続型EPO結合体の残存率を示す。
各種液剤組成間の保存安定性の比較
保存安定性について、実施例2〜8で保存安定性が証明された、リン酸緩衝溶液(pH6.5)、塩化ナトリウム、マンニトール及びポリソルベート80で製造された液剤を、市販されている様々な種類の剤形の組成を持続型EPO結合体に適用して製造された液剤と比較した。
持続型EPO結合体の液剤の長期保存及び加速安定性の試験
長期保存安定性及びその加速安定性を確認するために、最も優れた保存安定性を示すことが確認された安定化剤組成であるリン酸緩衝溶液(pH6.5)、塩化ナトリウム、マンニトール及びポリソルベート80を含む持続型EPO結合体の液剤を4℃で12カ月間保存して試料の保存安定性を分析した。保存の具体的な条件を下記表18に示す。分析結果を下記表19及び図2に示す。表19において、RP−HPLC(%)及びSE−HPLC(%)は初期値に対する持続型EPO結合体の残存率を示す。
Claims (25)
- エリスロポエチン(EPO)が非ペプチドポリマーまたはペプチドリンカを通して免疫グロブリンFcフラグメントに共有結合された治療学的有効量の持続型エリスロポエチン結合体と、緩衝溶液及びマンニトールを含むアルブミンフリー安定化剤とを含み、
前記アルブミンフリー安定化剤は、5〜20%(w/w)の濃度でマンニトールを含み、且つ中性アミノ酸を含んでいない、持続型エリスロポエチン(EPO)結合体の液剤。 - 前記緩衝溶液が、クエン酸、リン酸、酒石酸、炭酸、コハク酸、乳酸及び酢酸緩衝溶液からなる群から選択されるものである請求項1に記載の液剤。
- 前記緩衝溶液が、5〜100mMの濃度を有するものである請求項1に記載の液剤。
- 前記緩衝溶液が、4〜8のpHを有するものである請求項1に記載の液剤。
- 前記アルブミンフリー安定化剤が、等張化剤、多価アルコール、糖類、非イオン性界面活性剤及びそれらの組み合わせからなる群から選択された成分をさらに含むものである請求項1に記載の液剤。
- 前記等張化剤が、塩化ナトリウム、硫酸ナトリウム、クエン酸ナトリウム及びそれらの組み合わせからなる群から選択された塩である請求項5に記載の液剤。
- 前記等張化剤が、5〜200mMの濃度を有するものである請求項5に記載の液剤。
- 前記非イオン性界面活性剤が、ポリソルベート系又はポロキサマー系非イオン性界面活性剤である請求項5に記載の液剤。
- 前記ポリソルベート系非イオン性界面活性剤が、ポリソルベート20、ポリソルベート40、ポリソルベート60及びポリソルベート80からなる群から選択されるものである請求項8に記載の液剤。
- 前記非イオン性界面活性剤が、液剤の総体積比で0.001〜0.05%(w/v)の濃度を有するものである請求項5に記載の液剤。
- 前記糖類が、マンノース、グルコース、フコース(fucose)、キシロース(xylose)、ラクトース、マルトース、スクロース、ラフィノース、デキストラン及びそれらの組み合わせからなる群から選択されるものである請求項5に記載の液剤。
- 前記糖類が、液剤の総体積比で1〜20%(w/v)の濃度を有するものである請求項5に記載の液剤。
- 前記多価アルコールが、プロピレングリコール、低分子量ポリエチレングリコール、グリセロール、低分子量ポリプロピレン、グリコール及びそれらの組み合わせからなる群から選択されるものである請求項5に記載の液剤。
- 前記多価アルコールが、液剤において1〜15%(w/v)の濃度を有するものである請求項5に記載の液剤。
- 前記アルブミンフリー安定化剤が、5〜12%(w/v)の量のマンニトールを含むものである請求項1に記載の液剤。
- 前記アルブミンフリー安定化剤が、5〜100mMの濃度のリン酸緩衝溶液、5〜20%(w/v)の濃度のマンニトール、5〜200mMの濃度の塩化ナトリウム、及び0.001〜0.05%(w/v)の濃度のポリソルベート80を含むものである請求項1に記載の液剤。
- 前記EPOが、野生型EPOから1つもしくは複数のアミノ酸が置換、除去もしくは挿入されることにより変異した変異体EPOタンパク質、又は野生型EPOと同程度の活性を示すペプチド類似体である請求項1に記載の液剤。
- 前記EPOが、1〜500μg/mlの濃度を有するものである請求項1に記載の液剤。
- 前記免疫グロブリンFcフラグメントが、IgG、IgA、IgD、IgE、IgM及びそれらの組み合わせからなる群から選択されるものである請求項1に記載の液剤。
- 前記免疫グロブリンFcフラグメントが、IgG、IgA、IgD、IgE及びIgMからなる群からの異種由来のドメインからなるハイブリッド(hybrid)フラグメントである請求項19に記載の液剤。
- 前記免疫グロブリンFcフラグメントが、同種由来のドメインからなる一本鎖免疫グロブリンで構成される二量体又は多量体形態である請求項19に記載の液剤。
- 前記免疫グロブリンFcフラグメントがIgG4Fcフラグメントである請求項19に記載の液剤。
- 前記免疫グロブリンFcフラグメントがヒト非グリコシル化IgG4Fcフラグメントである請求項22に記載の液剤。
- 前記非ペプチドポリマーが、生分解性ポリマー、脂質ポリマー、キチン類、ヒアルロン酸及びそれらの組み合わせからなる群から選択されるものである請求項1に記載の液剤。
- 前記生分解性ポリマーが、ポリエチレングリコール、ポリプロピレングリコール、エチレングリコールとプロピレングリコールの共重合体、ポリオキシエチル化ポリオール、ポリビニルアルコール、ポリサッカライド、デキストラン、ポリビニルエチルエーテル、PLA(ポリ乳酸)及びPLGA(ポリ乳酸グリコール酸)からなる群から選択されるものである請求項24に記載の液剤。
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EP2635310A2 (en) | 2010-11-05 | 2013-09-11 | Rinat Neuroscience Corp. | Engineered polypeptide conjugates and methods for making thereof using transglutaminase |
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US10195289B2 (en) | 2013-07-31 | 2019-02-05 | Rinat Neuroscience Corp. | Engineered polypeptide conjugates using transglutaminase |
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