JP7411652B2 - 水性医薬製剤 - Google Patents
水性医薬製剤 Download PDFInfo
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- JP7411652B2 JP7411652B2 JP2021523191A JP2021523191A JP7411652B2 JP 7411652 B2 JP7411652 B2 JP 7411652B2 JP 2021523191 A JP2021523191 A JP 2021523191A JP 2021523191 A JP2021523191 A JP 2021523191A JP 7411652 B2 JP7411652 B2 JP 7411652B2
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- Prior art keywords
- histidine
- pharmaceutical formulation
- concentration
- aqueous pharmaceutical
- antibody
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Description
本開示の付随する特徴及び利点の多くは、以下の詳細な説明を参照し、付随する図面と共に考慮することで、より良く理解されるであろう。
添付の図面に関連して以下に提供される詳細な説明は、本発明の例の説明として意図されており、本発明の例のみが、構築され又は利用され得る形式を表すということは意図されていない。説明は、例の機能、及び例を構築し実施するための工程の順序を示している。ただし、同じ又は同等の機能及び順序が、異なる例によって実現される場合がある。
便宜のため、本明細書、例、及び添付の特許請求の範囲で使用されている特定の用語をここに集めて記載する。本明細書において異なる定義がされない限り、本開示で使用される科学的及び技術的用語は、当業者によって一般的に理解され、使用される意味を有するものとする。また、文脈上必要とされない限り、単数形には同じものの複数形が含まれ、複数形には単数形が含まれるものと理解される。具体的には、本明細書及び特許請求の範囲で使用される場合、文脈上明確に示されない限り、単数形の「1つ」には複数形の参照が含まれる。また、本明細書及び特許請求の範囲で使用される「少なくとも1つ」及び「1つ以上」という用語は同じ意味を持ち、1つ、2つ、3つ、又はそれ以上を含む。
本開示は、IL-6の受容体に特異的な抗体、すなわち抗IL6R抗体及びその抗体を安定化するための有効量のヒスチジンを含む水性医薬製剤に関する。
材料及び方法
トシリズマブIgGタンパク質
製剤に使用する抗IL6R抗体であるトシリズマブIgGタンパク質を、CHO細胞で発現させた。CHO細胞を2,000リットルのバイオリアクターで培養し、流加培養プロセスを実施した。上記のプロセスによって生成されたトシリズマブIgGタンパク質を、アフィニティークロマトグラフィー、イオン交換クロマトグラフィー、混合モードクロマトグラフィーなどを含む、当技術分野で知られている標準的な一連のクロマトグラフィーステップによって精製した。さらに、上記精製タンパク質を濃縮するために限外ろ過膜を使用したフローろ過を行った。選択したバッファーを交換するためにダイアフィルトレーションを行った。
熱ストレス試験
熱加速試験として知られる熱ストレスを、試験用製剤に適用した。簡単に説明すると、180mg/mlの抗IL6R抗体(トシリズマブIgGタンパク質)及び特定の成分(ヒスチジンなど)を含む製剤を、2~8℃、25℃、又は40℃で0、2、4、又は8週間インキュベートした。各試験製剤の純度を、サイズ排除クロマトグラフィー-高速液体クロマトグラフィー(SEC-HPLC)によって分析した。
凍結融解ストレスを、試験製剤に適用した。このプロセスは、180mg/mlの抗IL6R抗体(トシリズマブIgGタンパク質)及び特定の成分(ヒスチジンなど)を含む製剤を-80℃で少なくとも8時間凍結し、その後室温で融解させることで完了した。凍結と融解のサイクルを5回又は10回連続して繰り返した。次に、各試験製剤の純度をSEC-HPLCで分析した。
タンパク質の凝集と断片化をモニタリングし、トシリズマブタンパク質の純度を決定するために、SEC-HPLCを使用した。各サンプルを、製剤バッファーで10mg/mlの最終濃度に希釈し、HPLC分析にかけた。実験に用いたHPLCパラメータを表1にまとめた。
IgGタンパク質の安定化に対するアミノ酸の影響を評価するために、抗IL6受容体抗体であるトシリズマブを、約180mg/mlの濃度及びpH値5で水に溶解させ、40mMのアスパラギン酸(Asp)、プロリン(Pro)、フェニルアラニン(Phe)、アラニン(Ala)、スレオニン(Thr)、ロイシン(Leu)、アスパラギン(Asn)、グルタミン酸(Glu)、グルタミン(Gln)、セリン(Ser)、トリプトファン(Trp)、アルギニン(Arg)、ヒスチジン(His)、又はバリン(Val)を添加した。調製したサンプルを40℃又は25℃で4週間保存した後、SEC-HPLC分析を行った。結果を、それぞれ表2及び表3にまとめた。
IgGタンパク質の安定性に対するヒスチジン濃度の影響を評価するために、180mg/mlのトシリズマブを、pH値6.0の様々な濃度(10、20、40、60、80、100、125、150、及び200mMを含む)のヒスチジン緩衝液で製剤化し、0.03%(w/v)のポリソルベート80を添加した。このように調製した製剤に、それぞれ凍結融解ストレス(0、5、又は10サイクル)及び熱ストレス(2~8℃、25℃、又は40℃で0、2、又は4週間)を与え、続いてトシリズマブの純度を決定するため、SEC-HPLCの分析を行った。データをそれぞれ図1及び2に示す。
図1のパネル(a)及び(b)に示されているように、トシリズマブ単量体(純度%)はヒスチジン濃度の増加とともに増加し、高分子量種(HMW%)は、5サイクル又は10サイクルの凍結融解ストレスで処理する前後に関係なく、ヒスチジン濃度の増加とともに減少した。さらに、低分子量種については、5サイクル又は10サイクルの凍結融解ストレスで処理した後、ヒスチジンの濃度が異なるサンプル間で有意差はなかった(図1のパネル(c))。
図2のパネル(a)に示されているように、ヒスチジン緩衝液の濃度の増加に従って高分子量種(すなわち凝集体)(HMW%)の形成が減少するとともに純度が徐々に上昇し、40℃での保存は2~8℃及び25℃での保存よりも多くの高分子量種の生成を誘発した。
アルギニン及びメチオニン以外のアミノ酸と組み合わせたヒスチジンの抗体安定性への効果を評価するために、180mg/mlのトシリズマブを、0.03%のポリソルベート80(w/v、界面活性剤として機能する)を添加したpH6.0の高濃度ヒスチジン緩衝液(80mM)で製剤化し、さらにヒスチジン、リジン、スレオニン、セリン、プロリン、バリン、及びアラニンのうちから選択された70mMの濃度のアミノ酸を製剤に追加した。試験製剤を熱加速試験(25℃又は40℃で8週間保存)に供し、SEC-HPLCで分析した。データをそれぞれ表4及び表5にまとめた。
低pH条件でのタンパク質安定性に対するヒスチジンの安定化効果をさらに明らかにするために、180mg/mlのトシリズマブを、賦形剤として0.03%(w/v)ポリソルベート80の存在下で、以下から選択されるアミノ酸を添加した又は添加していないpH5.4の酢酸緩衝液に溶解させた:1.5%ヒスチジンHCl(78mMヒスチジン、サンプルID:A1.5H3S)、2.5%ヒスチジンHCl(130mMヒスチジン、サンプルID:A2.5H)、1.5%リジンHCl(82.1mMリジン、サンプルID:A1.5L3S)、又は2.5%リジンHCl(136.9mMリジン、サンプルID:A2.5L)。1.5%のアミノ酸を含む製剤(つまり、A1.5L3S、及びA1.5H3S)にはさらに安定剤として3%のスクロースを追加した。アミノ酸を添加していない製剤(サンプルID:A、及びA3S)を実験の対照群とした。これらの調製された製剤を、25℃又は40℃で8週間保存し、SEC-HPLCによって分析した。結果を、それぞれ表6及び7にまとめた。
Claims (6)
- 水性医薬製剤であって、
インターロイキン(IL)-6の受容体に結合する抗体と、
60mM~150mMの濃度のヒスチジンと、
0.01~0.05%(w/v)の濃度の界面活性剤と、
リジン、スレオニン、セリン、プロリン、バリン、及びアラニンからなる群から選択される、70mMの濃度で存在するアミノ酸とを含み、
前記抗体はトシリズマブであり、かつ180mg/mLの濃度で水性医薬製剤中に存在し、
前記水性医薬製剤のpHは5.0~6.5である、水性医薬製剤。 - ヒスチジンは60mM~125mMの濃度で水性医薬製剤中に存在する、請求項1に記載の水性医薬製剤。
- 界面活性剤はポリソルベートであり、0.03%(w/v)の濃度で水性医薬製剤中に存在する、請求項1に記載の水性医薬製剤。
- 70mMのバリンを含む、請求項1に記載の水性医薬製剤。
- 180mg/mLの濃度のトシリズマブと、
80mMの濃度のヒスチジンと、
0.03%(w/v)の濃度のポリソルベート80と、
リジン、スレオニン、セリン、プロリン、バリン、及びアラニンからなる群から選択される、70mMの濃度で存在するアミノ酸と
を含み、前記水性医薬製剤のpHは6.0である、請求項1~3のいずれか一項に記載の水性医薬製剤。 - 前記アミノ酸がバリンである、請求項5に記載の水性医薬製剤。
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