JP7140778B2 - ペプチド送達用の安定なエマルジョンを製造するための方法 - Google Patents
ペプチド送達用の安定なエマルジョンを製造するための方法 Download PDFInfo
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Description
a)少なくとも3つの異なる溶液A、B及びCを準備する工程であって、
・溶液Aが、酸性の水性媒体であり、X及びaがそれぞれシクロヘキシルアラニン及びd-アラニンを表すペプチドaKXVAAWTLKAAa(配列番号1)を含み、
・溶液Bが、任意のペプチドを添加する前のpHが12.5から12.9の間である塩基性の水性媒体であり、ペプチドYLSGADLNL(配列番号8)を含み、
・溶液Cが、DMSOであり、ペプチドKVFGSLAFV(配列番号7)を含み、
・溶液A及び/又は溶液Bが、Bがα-アミノイソ酪酸を表すKLBPVQLWV(配列番号6)、SMPPPGTRV(配列番号5)、IMIGHLVGV(配列番号9)、LLTFWNPPV(配列番号4)、KVAEIVHFL(配列番号10)、RLLQETELV(配列番号2)及びYLQLVFGIEV(配列番号3)から選択される少なくとも3つの追加のペプチドを更に含む、工程と、
b)前記溶液を混合して懸濁液を形成する工程と、
c)前記懸濁液のpHを約7に調節する工程と
を含む方法によって調製される。
本発明の好適な実施形態によると、ペプチドは、腫瘍関連抗原(TAA)エピトープ、好ましくはHLA-A2結合TAAエピトープ及び/又はその類似体から選択されてもよい。
本発明に使用されるペプチド懸濁液は、それぞれ少なくとも2つの異なるペプチドを含有する少なくとも2つの異なる溶液を準備する工程を含むプロセスにより調製することができる。本発明のある実施形態によると、それぞれが少なくとも1つの特定のペプチドを含む、3つの異なる溶液A、B及びCが調製される。特に、溶液Aは酸性の水性媒体であり、溶液Bは塩基性の水性媒体であり、溶液Cは有機媒体、特に、DMSO(ジメチルスルホキシド)である。好適な実施形態において、溶液A、B及びCは、それぞれ、少なくともaKXVAAWTLKAAa(配列番号1)、YLSGADLNL(配列番号8)及びKVFGSLAFV(配列番号7)を含む。
a)少なくとも3つの異なる溶液A、B及びCを準備する工程であって、
・溶液Aが、X及びaがそれぞれシクロヘキシルアラニン及びd-アラニンを表すペプチドaKXVAAWTLKAAa(配列番号1)を含み、
・溶液Bが、ペプチドYLSGADLNL(配列番号8)を含み、
・溶液Cが、ペプチドKVFGSLAFV(配列番号7)を含み、
・溶液A及び/又は溶液Bが、Bがα-アミノイソ酪酸を表すKLBPVQLWV(配列番号6)、SMPPPGTRV(配列番号5)、IMIGHLVGV(配列番号9)、LLTFWNPPV(配列番号4)、KVAEIVHFL(配列番号10)、RLLQETELV(配列番号2)及びYLQLVFGIEV(配列番号3)から選択される少なくとも3つの追加のペプチドを更に含む、工程と、
b)前記溶液を混合して懸濁液を形成する工程と、
c)前記懸濁液のpHを約7に調節する工程と
を含む、ペプチド懸濁液を製造するための方法であって、
好ましくは、溶液BのpHは、任意のペプチドをそこに添加する前に12.5から12.9の間に調節される、方法に関する。
本発明は、その後、油中水型エマルジョンを得るようペプチド懸濁液をアジュバントと混合することで構成され、これは、樹状細胞へのペプチドの提示を促進すると考えられる。この種のエマルジョンでは、ペプチドを含有する水相は、油の連続相中に液滴の形態で閉じ込められ、これが、水中油型エマルジョンと比較した場合、デポーからの抗原のよりゆっくりとした放出、したがって、より強い長期免疫を可能にする。
本発明はまた、本発明による懸濁液の調製に続く、前記懸濁液の油中水型乳化剤との混合を含む、非経口投与用のエマルジョンを調製するためのプロセスに関する。
本発明による懸濁液の調製
標準的なBoc又はFmoc固相化学を使用してPolyPeptide社(サンディエゴ、CA)によって以下の10個のペプチドが合成された。
aKXVAAWTLKAAa(配列番号1)=MPS-7、
SMPPPGTRV(配列番号5)=MPS-103、
IMIGHLVGV(配列番号9)=MPS-214、
KVAEIVHFL(配列番号10)=MPS-215、
YLSGADLNL(配列番号8)=MPS-200、
KLBPVQLWV(配列番号6)=MPS-102、
LLTFWNPPV(配列番号4)=MPS-213、
RLLQETELV(配列番号2)=MPS-112、
YLQLVFGIEV(配列番号3)=MPS-106、及び
KVFGSLAFV(配列番号7)=MPS-216。
比較実験
水酸化ナトリウムの量を(WO2004/094454に記載されている)0.10Mから0.013Mに変動させたことを除いて実施例1に記載されている溶液2と同一のペプチド溶液を調製した。
懸濁液の安定性
以下に示されるとおり、ペプチド凝集の可能性を評価するためにさらなる試験を設定した。この方法は、ペプチド凝集を監視することができ、高感度で特異的で正確である。製造の間又は保存の間に起こる可能性のある構造的及び質量の改変又は変形を監視するのに適していた。液体クロマトグラフィー質量分析(LC-UV/MS)は、ペプチドの正体及びペプチド間の共有結合の不在を確実にするために行った。この方法は、いくらかのペプチド沈殿物が存在しているにもかかわらず、ペプチド間の凝集がないことを確認するために開発された。この目的は、さまざまな条件、-20℃、+5℃及び+25℃における9か月の保存の間に実施例1の懸濁液中に含まれるペプチド間にいくらか共有結合が構築され得るかを判断することであった。
カラム:Advance BioペプチドマッピングLCカラム、2.1×250mm、2.7μm、C18、120Å、Agilent参照番号651750-902
検出:215nm及び280nm
流量:0.3ml/分
注入量:5μl
ランタイム:100分
カラム温度:35℃±2℃
サンプル温度:5℃
ニードル洗浄:ジメチルスルホキシド(DMSO)中の0.1%トリフルオロ酢酸(TFA)
移動相:溶離液A:5%アセトニトリル中の0.2% TFA
溶離液B:95%アセトニトリル中の0.2% TFA
実施例1の懸濁液を含有する1バイアル(約1ml)の中身を10mlのメスフラスコに移し、DMSO中の0.1% TFAにより満杯にする。正確なサンプル質量を求めるためにサンプル採取の前後にバイアルを計量する。
本発明による必要に応じて調製されるW/Oエマルジョンの調製
注射可能な臨床上の生成物を調製するために、実施例1の懸濁液を、油中水型乳化混合物(SEPPIC社から供給されたMontanide(登録商標)ISA 51、バイアル中で暗所において2℃~8℃で保存された)と1:1の質量比で混合することによって油中水型エマルジョンを形成し、これは、0.9mlのペプチド懸濁液及び1.1mlの乳化剤に相当する。特に、懸濁液及び乳化剤は、混合する直前に室温にし、それぞれシリンジに移した。エマルジョンを、これらのシリンジに連結されたプラスチックコネクターによって必要に応じて調製した。シリンジのプランジャーを交互にゆっくりとそれぞれ20回、その後、高速でそれぞれ40回押した。任意のシリンジから、1mlのこのエマルジョンを皮下経由で患者に注射することができる。
本発明によるすぐに使えるW/Oエマルジョンの調製
注射可能な臨床上の送達生成物を調製するために、実施例1の懸濁液を、油性アジュバント(SEPPIC社から供給されたMontanide(登録商標)ISA 51)と1:1の質量比で混合することによって油中水型エマルジョンを形成した。エマルジョンを調製するために、実行中に不活性ガスブランケットをもたらすよう、デバイスのミキサーバッグをまず窒素で膨らませた。5200gの乳化剤をろ過した後、無菌条件下において、軸流タービンを備えるAllegro(登録商標)ミキサーの混合チャンバーに移した。撹拌翼の回転速度を200rpmにセットした後、無菌条件下において、5200gの上記の懸濁液をゆっくりと(1分~2分以内に)混合チャンバーに添加した。撹拌を5分間続けた。
さまざまな撹拌時間を使用したエマルジョンの調製
本発明によるエマルジョンを、さまざまな撹拌時間を使用して実施例5に記載されているとおりに調製した。各種ペプチドの最初の濃度を下の表に報告する。
エマルジョンの化学的安定性
実施例5に従って調製したエマルジョンに含まれるペプチドの化学的安定性を以下の方法によって評価する。
カラム:Advance BioペプチドマッピングLCカラム、2.1×250mm、2.7μm、C18、120Å、Agilent(登録商標)参照番号651750-902又は同等物
検出:215nm及び280nm
流量:0.3ml/分
注入量:5μl
ランタイム:100分
カラム温度:35℃±2℃
サンプル温度:5℃
ニードル洗浄:ジメチルスルホキシド(DMSO)中の0.1%トリフルオロ酢酸(TFA)
移動相:溶離液A:5%アセトニトリル中の0.2% TFA
溶離液B:95%アセトニトリル中の0.2% TFA
濃度(mg/g)=A/S×0.9X/10×5×1/W
式中、
A:サンプル溶液中のそれぞれのペプチドのピーク面積である
S:標準溶液中のそれぞれのペプチドのピーク面積である
W:g単位で表されるサンプル質量である
エマルジョンの物理的安定性
実施例5に記載されているとおりに調製したエマルジョンのさまざまなサンプルの液滴のサイズを、粒度計(Malvernマスターサイザー3000E光学システム)を使用したレーザー回折によって測定した。これらのサンプルを、ミキサーのさまざまな領域から回収した。その結果を、最大サイズの液滴のx%、すなわちDxとして表した。それらの概要を下記表に示す。
免疫原性
一部のペプチドは、実施例1に記載されているとおりに調製した懸濁液中で部分的に又は完全に沈殿すると確認した。
MPS-216 KVFGSLAFV(配列番号7)(33%の溶解度)
MPS-215 KVAEIVHFL(56%の溶解度)
MPS-106 YLQLVFGIEV(0%の溶解度)
比較実験
混合が回転子-固定子構成を有する高せん断ミキサー(Silverson(登録商標)Verso)によって行われたことを除いて、実施例1に記載されているとおりに調製した懸濁液を同じアジュバントと同じ比で混合した。2000rpm及び8000rpmの撹拌速度は、それぞれ15分間及び2分間を使用した。非常に粘稠なクリームが得られ、これは、注射可能な製品として使用することができなかった。5000rpm及び8000rpmで同じミキサーを用いて得た他のバッチはペプチド分解を引き起こしていた。特に、4℃における6週間の保存後にペプチドSMPPPGTRV(配列番号5)の8.5%の酸化が認められ、-20℃でも依然として2%の酸化が認められた。更に、ペプチドIMIGHLVGV(配列番号9)に関しては、4℃における6週間の保存後に16.5%の酸化が認められ、-20℃でも依然として4%の酸化が認められた。
Claims (15)
- すぐに使えるペプチドエマルジョンを工業規模で製造するための方法であって、少なくとも2つのペプチドの懸濁液を、低せん断条件下で、100rpmから1000rpmの間の回転速度で2分間から20分間、炭化水素油と油中水型乳化剤の混合物からなる、少なくとも1つのアジュバントと乳化する工程を含む、方法。
- 前記ペプチドが、少なくとも1つの可溶性ペプチド及び少なくとも1つの不溶性ペプチドを含むことを特徴とする、請求項1に記載の方法。
- 前記ペプチドが、ペプチドKVFGSLAFV(配列番号7)、ペプチドYLSGADLNL(配列番号8)、ペプチドKLBPVQLWV(配列番号6)(Bはα-アミノイソ酪酸を表す)、ペプチドSMPPPGTRV(配列番号5)、ペプチドIMIGHLVGV(配列番号9)、ペプチドLLTFWNPPV(配列番号4)、ペプチドRLLQETELV(配列番号2)、ペプチドaKXVAAWTLKAAa(配列番号1)(X及びaはそれぞれシクロヘキシルアラニン及びd-アラニンを表す)、ペプチドYLQLVFGIEV(配列番号3)並びにペプチドKVAEIVHFL(配列番号10)からなる群から選択されることを特徴とする、請求項1又は2に記載の方法。
- 前記懸濁液が、ペプチドKVFGSLAFV(配列番号7)、ペプチドYLSGADLNL(配列番号8)、ペプチドKLBPVQLWV(配列番号6)、ペプチドSMPPPGTRV(配列番号5)、ペプチドIMIGHLVGV(配列番号9)、ペプチドLLTFWNPPV(配列番号4)、ペプチドRLLQETELV(配列番号2)、ペプチドaKXVAAWTLKAAa(配列番号1)(X及びaはそれぞれシクロヘキシルアラニン及びd-アラニンを表す)、ペプチドYLQLVFGIEV(配列番号3)並びにペプチドKVAEIVHFL(配列番号10)の組合せを含むことを特徴とする、請求項3に記載の方法。
- 前記炭化水素油が、パラフィン油、植物油、スクアレン、スクアラン又は鉱油から選択され、前記油中水型乳化剤が、マンニドモノオレアート及びソルビタンモノオレアートから選択されることを特徴とする、請求項1から4のいずれか一項に記載の方法。
- 前記アジュバントと前記ペプチド懸濁液との質量比は、10:1から1:10、好ましくは5:1から1:5、より好ましくは2:1から1:2の範囲であり、更に好ましくは1:1であることを特徴とする、請求項1~5のいずれか一項に記載の方法。
- 混合する工程のすべて又は一部が、不活性雰囲気下、好ましくは窒素下において行われることを特徴とする、請求項1から6のいずれか一項に記載の方法。
- 前記エマルジョンの体積が、5Lよりも大きい、好ましくは10L以上であることを特徴とする、請求項1から7のいずれか一項に記載の方法。
- 前記ペプチド懸濁液が、
a)少なくとも3つの異なる溶液A、B及びCを準備する工程であって、
・溶液Aが、酸性の水性媒体であり、ペプチドaKXVAAWTLKAAa(配列番号1)(X及びaはそれぞれシクロヘキシルアラニン及びd-アラニンを表す)を含み、
・溶液Bが、任意のペプチドを添加する前のpHが12.5から12.9の間である塩基性の水性媒体であり、ペプチドYLSGADLNL(配列番号8)を含み、
・溶液Cが、DMSOであり、ペプチドKVFGSLAFV(配列番号7)を含み、
・溶液A及び/又は溶液Bが、KLBPVQLWV(配列番号6)(Bはα-アミノイソ酪酸を表す)、SMPPPGTRV(配列番号5)、IMIGHLVGV(配列番号9)、LLTFWNPPV(配列番号4)、KVAEIVHFL(配列番号10)、RLLQETELV(配列番号2)及びYLQLVFGIEV(配列番号3)から選択される少なくとも3つの追加のペプチドを更に含む、工程と、
b)前記溶液を混合して懸濁液を形成する工程と、
c)前記懸濁液のpHを約7に調節する工程と
を含む方法によって調製されることを特徴とする、請求項1から8のいずれか一項に記載の方法。 - 前記溶液Aが、aKXVAAWTLKAAa(配列番号1)、SMPPPGTRV(配列番号5)、IMIGHLVGV(配列番号9)及びKVAEIVHFL(配列番号10)を含み、前記溶液Bが、YLSGADLNL(配列番号8)、KLBPVQLWV(配列番号6)、LLTFWNPPV(配列番号4)、RLLQETELV(配列番号2)及びYLQLVFGIEV(配列番号3)を含む、請求項9に記載の方法。
- 請求項1から10のいずれか一項に記載の方法により得ることが可能なすぐに使えるエマルジョンであって、前記エマルジョンが、ペプチドKVFGSLAFV(配列番号7)、ペプチドYLSGADLNL(配列番号8)、ペプチドKLBPVQLWV(配列番号6)、ペプチドSMPPPGTRV(配列番号5)、ペプチドIMIGHLVGV(配列番号9)、ペプチドLLTFWNPPV(配列番号4)、ペプチドRLLQETELV(配列番号2)、ペプチドaKXVAAWTLKAAa(配列番号1)(X及びaはそれぞれシクロヘキシルアラニン及びd-アラニンを表す)、ペプチドYLQLVFGIEV(配列番号3)並びにペプチドKVAEIVHFL(配列番号10)の組合せを含み、前記エマルジョンのD50が10±2μmであることを特徴とする、すぐに使えるエマルジョン。
- 前記エマルジョン中のそれぞれのペプチドの量が、0.1mg/mlから10mg/ml、好ましくは0.5mg/mlから1mg/mlの範囲であり、前記エマルジョンの調製に使用された量と10%より大きく異ならないことを特徴とする、請求項11に記載のすぐに使えるエマルジョン。
- 単独で、又は化学療法、標的療法、放射線療法若しくはその他の免疫療法と組み合わせて、がんの処置において使用するための、請求項11又は12に記載のすぐに使えるエマルジョン。
- 前記その他の免疫療法が、チェックポイント阻害剤である、請求項13に記載のすぐに使えるエマルジョン。
- HLA-A2レセプターを発現する患者における、がんの処置において使用するための、請求項13に記載のすぐに使えるエマルジョン。
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