JP7085482B2 - スタフィロコッカス感染症のための凍結乾燥製剤を製造する方法 - Google Patents
スタフィロコッカス感染症のための凍結乾燥製剤を製造する方法 Download PDFInfo
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- JP7085482B2 JP7085482B2 JP2018536378A JP2018536378A JP7085482B2 JP 7085482 B2 JP7085482 B2 JP 7085482B2 JP 2018536378 A JP2018536378 A JP 2018536378A JP 2018536378 A JP2018536378 A JP 2018536378A JP 7085482 B2 JP7085482 B2 JP 7085482B2
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- staphylococcus
- antibacterial protein
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Description
図面では、
本発明の抗菌性タンパク質の発現プラスミドが配列番号3に示された本発明の抗菌性タンパク質をコードする遺伝子をpBAD-TOPOベクター(Invitrogen)内に常法によってサブクローニングして作製した。得られたプラスミドで形質転換した大腸菌(Escherichia coli)BL21細胞を、本発明の抗菌性タンパク質のための産生宿主として用いた。
本発明の抗菌性タンパク質を含むスタフィロコッカス感染症治療のための薬剤学的組成物は、凍結乾燥によって製造した。次の組成を有する凍結乾燥製剤を製造した。
実施例1で製造したタンパク質溶液を、通常の透過ろ過(diafiltration)を用いて、緩衝液(1.56g/L L-ヒスチジン(pH6.0)、50g/L D-ソルビトール、1.47g/L CaCl2 2H2Oおよび1g/Lポロクサマー188)に緩衝液を交換し、
得られた溶液を遠心分離フィルター(10K)を用いて濃縮し、
通常のビシンコニン酸(bicinchoninic acid、BCA)検定法によって決定されたタンパク質の濃度を基にして、抗菌性タンパク質の濃度を緩衝液(1.56g/L L-ヒスチジン(pH6.0)、50g/L D-ソルビトール、1.47g/L CaCl2 2H2Oおよび1g/Lポロクサマー188)で18mg/mLになるように調整して、
濃度調整された溶液を0.2μmフィルターを用いて濾過し、
濾過溶液1mLを3mLガラスバイアルに添加して、充填したバイアルをステンレススチールトレイに置いて、
前記トレイを凍結乾燥機にかけて、凍結乾燥サイクルを用いて凍結乾燥する:
4℃で約20分間平衡化し、
保管温度を-40℃に下げて12時間維持し、
凝縮器の温度を-50℃に下げ、
チャンバーに真空をかけ、
真空が1,500mtorrの数値に達したら、保管温度を-20℃まで上げて、16時間維持し、
保管温度を時間当たり10℃のずつ20℃まで上げて、4時間維持し、
真空を解除し、
終結し(stoppering)、終結したバイアルを適切な栓で密封する。
凍結乾燥製剤および液体製剤の生物学的活性を実施例2で用いた濁度減少検定法を用いて比較した。凍結乾燥製剤として、1ヶ月保存した凍結乾燥製剤を使用した。生物学的活性を分析する前に、注射用水(0.92mL)を用いて再構成した。液体製剤として、実施例2で記述した手順に従って、新たに製造濾過した溶液を使用した。本実験では、次の菌株を使用した。表3は、テスト菌株を示す。
本発明の凍結乾燥製剤が単一のスタフィロコッカス感染症に及ぼす治療効果を、動物モデルを用いて調査した。本実験では、スタフィロコッカスエピデルミディスおよびスタフィロコッカスヘモリチカスをスタフィロコッカス菌株のモデルとして選んだ。凍結乾燥製剤として、1ヶ月保存した凍結乾燥製剤を使用した。動物実験に使用する前に、注射用水(0.92mL)を用いて再構成した。液体製剤として、実施例2で記述した手順に従って新たに製造し濾過した溶液を使用した。
本発明の凍結乾燥製剤が複数のスタフィロコッカス感染症に及ぼす治療効果を、動物モデルを用いて調査した。本実験では、スタフィロコッカスエピデルミディス、スタフィロコッカスルグドゥネンシスおよびスタフィロコッカスワルネリをスタフィロコッカス菌株のモデルとして選んだ。凍結乾燥製剤として、1ヶ月保存した凍結乾燥製剤を使用した。動物実験に使用する前に、注射用水(0.92mL)を用いて再構成した。液体製剤として、実施例2で記述した手順に従って新たに製造し濾過した溶液を使用した。
Claims (7)
- 凍結乾燥製剤を製造する方法であって、
配列番号1で示されるアミノ酸配列を含む第1抗菌性タンパク質および配列番号2で示されるアミノ酸配列からなる第2抗菌性タンパク質の混合物を製造する工程と、
前記混合物、ポロクサマー188、D-ソルビトールおよびL-ヒスチジンを含む溶液を製造する工程と、
前記溶液を凍結乾燥機にかけて凍結乾燥サイクルを用いて凍結乾燥する工程とを含み、
前記混合物が次のスタフィロコッカス種:スタフィロコッカスアルレッテ(Staphylococcus arlettae)、スタフィロコッカスアウレウス(Staphylococcus aureus)、スタフィロコッカスアウリクラリス(Staphylococcus auricularis)、スタフィロコッカスカルノスス(Staphylococcus carnosus)、スタフィロコッカスカルプレ(Staphylococcus carprae)、スタフィロコッカスクロモゲネス(Staphylococcus chromogenes)、スタフィロコッカスコーニィ(Staphylococcus cohnii)、スタフィロコッカスデルフィニ(Staphylococcus delphini)、スタフィロコッカスエピデルミディス(Staphylococcus epidermidis)、スタフィロコッカスエクオルム(Staphylococcus equorum)、スタフィロコッカスガリナルム(Staphylococcus gallinarum)、スタフィロコッカスヘモリチカス(Staphylococcus hemolyticus)、スタフィロコッカスホミニス(Staphylococcus hominis)、スタフィロコッカスインターメディウス(Staphylococcus intermedius)、スタフィロコッカスクローシィ(Staphylococcus kloosii)、スタフィロコッカスレントゥス(Staphylococcus lentus)、スタフィロコッカスルグドゥネンシス(Staphylococcus lugdunensis)、スタフィロコッカスムスカエ(Staphylococcus muscae)、スタフィロコッカスパステウリ(Staphylococcus pasteuri)、スタフィロコッカスサプロフィティクス(Staphylococcus saprophyticus)、スタフィロコッカスワルネリ(Staphylococcus warneri)とスタフィロコッカスザイロサス(Staphylococcus xylosus)のすべてに対し殺菌活性を有し、
前記混合物が次の(1)~(5)の工程によって生物学的に製造され、
(1)配列番号3に示された抗菌性タンパク質をコードする遺伝子をベクター内にサブクローニングして発現プラスミドを作製する工程、
(2)前記発現プラスミドで大腸菌(Escherichia coli)BL21細胞を形質転換して産生宿主細胞を作製する工程、
(3)前記産生宿主細胞を37℃で培養する工程、
(4)600nmでの光学密度2.0でアラビノースを添加して抗菌性タンパク質の発現を誘導する工程、
(5)誘導地点から19℃で10時間前記産生宿主細胞を培養する工程、
前記混合物が15~35モル%の前記第1抗菌性タンパク質および65~85モル%の前記第2抗菌性タンパク質を含むものである、方法。 - 前記混合物の凍結乾燥以前の前記溶液の濃度が、0.1mg/mL~30mg/mLである、請求項1に記載の方法。
- 前記混合物が、25モル%の前記第1抗菌性タンパク質および75モル%の前記第2抗菌性タンパク質を含む、請求項1に記載の方法。
- 凍結乾燥以前の前記溶液での前記ポロクサマー188の濃度が、0.1g/L~10g/Lである、請求項1に記載の方法。
- 凍結乾燥以前の前記溶液での前記D-ソルビトールの濃度が、1g/L~600g/Lである、請求項1に記載の方法。
- 凍結乾燥以前の前記溶液での前記L-ヒスチジンの濃度が、0.1g/L~10g/Lである、請求項1に記載の方法。
- 前記凍結乾燥サイクルが、
4℃で20分間平衡化する工程、
保管温度を-40℃に下げて12時間維持する工程、
凝縮器の温度を-50℃に下げる工程、
チャンバーに真空をかける工程、
真空が1,500mtorrの数値に達したら、保管温度を-20℃まで上げて、16時間維持する工程、
保管温度を時間当たり10℃ずつ20℃まで上げて、4時間維持する工程、
真空を解除する工程、
終結し、終結したバイアルを栓で密封する工程を含む、請求項1に記載の方法。
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