JP5563572B2 - 三末端官能基を有する非ペプチド性重合体を用いた生理活性ポリペプチド薬物結合体 - Google Patents
三末端官能基を有する非ペプチド性重合体を用いた生理活性ポリペプチド薬物結合体 Download PDFInfo
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- JP5563572B2 JP5563572B2 JP2011519993A JP2011519993A JP5563572B2 JP 5563572 B2 JP5563572 B2 JP 5563572B2 JP 2011519993 A JP2011519993 A JP 2011519993A JP 2011519993 A JP2011519993 A JP 2011519993A JP 5563572 B2 JP5563572 B2 JP 5563572B2
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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- A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
- A61K47/6889—Conjugates wherein the antibody being the modifying agent and wherein the linker, binder or spacer confers particular properties to the conjugates, e.g. peptidic enzyme-labile linkers or acid-labile linkers, providing for an acid-labile immuno conjugate wherein the drug may be released from its antibody conjugated part in an acidic, e.g. tumoural or environment
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Description
5K プロピオンALD(3)PEG(プロピオンアルデヒド基を3つ有しているPEG、NOF、日本)を免疫グロブリンFcのN−末端にペグ化させるために免疫グロブリンFcとPEGのモル比を1:2、免疫グロブリンFc濃度を10mg/mlにし、4℃で4.5時間反応させた。この時の反応は、pH6.0の100mM濃度のリン酸カリウム緩衝液中で行われ、還元剤の20mM SCB(NaCNBH3)を添加して反応させた。反応液は、SOURCE Q(XK 16ml、GE Healthcare)を介してモノペグ免疫グロブリンのFcを精製した。その後、オクトレオチドと免疫グロブリンFc−5K PEGのモル比を1:2、全蛋白質濃度を25mg/mlにし、4℃で20時間反応させた。反応液は、100mMリン酸カリウム pH6.0であり、還元剤の20mM SCBを添加した。カップリング反応液は、SP HP精製コラムで精製される。SP HP(XK 16ml、GE Healthcare)に10mM リン酸ナトリウム緩衝液(pH5.4)を用い、カップリング反応に参与していない免疫グロブリンFc−5Kは、コラムにつけず、ローディングを介して分離し、免疫グロブリン−PEG−オクトレオチド(HM11760B)は、コラムに弱くつけ、1M 塩化ナトリウム(Nacl)を用いて塩勾配で溶出させる。
流速:2.0ml/分
勾配:A 0→20%60分B(A:10mM Na-P pH5.4、B:A+1M NaCl)。
実施例1の方法を用い、5K プロピオンALD(3)PEGを免疫グロブリン−FcのN−末端と反応させた後、モノペグ免疫グロブリンFcのみを精製してカルシトニンとカップリングさせた。カルシトニンと免疫グロブリンFc−5K PEGモル比を1:2、全蛋白質濃度を25mg/mlにし、4℃で20時間反応させた。反応液は、100mMリン酸カリウム pH6.0であり、還元剤の20mM SCBを添加した。カップリング反応液は、SP HP精製コラムで精製される。
流速:2.0ml/分
勾配:A 0→20%60分B(A:10mM Na-P pH5.4、B:A+1M NaCl)。
実施例1および2で製造した免疫グロブリンFc−3 arm PEG−オクトレオチド(N)結合体および免疫グロブリンFc−3 arm PEG−カルシトニン(N)結合体を用いて、3 arm PEG結合体と2 arm PEG結合体との製造収率比較した(表1)。
実施例1の方法を用いて5K プロピオンALD(3)PEGを免疫グロブリン−FcのN−末端と反応させた後、モノペグ免疫グロブリンFcのみを精製してFSHとカップリングさせた。FSHと免疫グロブリンFc−5K PEGのモル比を1:15、全蛋白質濃度を40mg/mlにし、4℃で20時間反応させた。反応液は、100mM リン酸カリウム pH6.0であり、還元剤の20mM SCBを添加した。カップリング反応液は、2つの精製カラムを経て精製される。まず、カップリング反応に参与していない多量の免疫グロブリンFc−5K PEGを除去するために、ブルー HP(Hitrap 5ml、GE Healthcare)を用いた。その後、リソース Iso(1ml、GE Healthcare)を用いて、FSHに免疫グロブリンFc−5K PEGが2つ以上ついた多重合体不純物を疎水性に基づいて除去する。
流速:3.0ml/分
勾配:A 0→100% 20分 B
A:50mM Gly-NaOH+0.2M KCl
B:50mM Gly-NaOH+2.5M KCl
コラム:リソース ISO(1ml, GE Healthcare)
A 0→100% 90分 B(A: 20mM Tis pH7.5, B: A + 1.3M A.S)。
5K プロピオンALD(3)PEG(プロピオンアルデヒド基を3つ有しているPEG、NOF、日本)を免疫グロブリンFcのN−末端にペグ化させるために、免疫グロブリンFcとPEGのモル比を1:2、免疫グロブリンFc濃度を10mg/mlにし、4℃で4.5時間反応させた。この時の反応は、pH 6.0の100mM濃度のリン酸カリウム緩衝液中で行われ、還元剤の20mM SCB(NaCNBH3)を添加して反応させた。反応液は、ソースQ(LRC25 85ml、GE Healthcare)を介してモノペグ免疫グロブリンのFcを精製した。その後、インスリンと免疫グロブリンFc−5K PEGのモル比を1:4、全蛋白質濃度を20mg/mlにし、4℃で19.5時間反応させた。反応液は、100mM リン酸カリウム pH6.0であり、還元剤の20mM SCBを添加した。カップリング反応液は、2つの精製コラムを経て精製される。まず、カップリング反応に参与していない多量の免疫グロブリンFc−5Kを除去するために、ソース Q(LRC25 85ml、GE Healthcare)を用いた。20mM トリス(pH7.5)で、1M 塩化ナトリウム(Nacl)を用いて塩勾配を与えると、相対的に結合力の弱い免疫グロブリンFc−5K PEGが先に溶出され、引き続いて免疫グロブリンFc−PEG−インスリンが溶出される。1次精製を介して免疫グロブリンFc−5Kが除去されるが、免疫グロブリンFc−5K PEGとインスリン多重合体不純物は完全に分離されない。したがって、2つ物質の分子量の差を用いて、セファクリル S−300(GE Healthcare)コラムで2次精製を行い、これと同時に、免疫グロブリンFc−PEG−インスリン結合体を剤形化した。分子量の大きい免疫グロブリンFc−5K PEGとインスリンの多重合体が先に溶出され、続いて免疫グロブリンFc−PEG−インスリン結合体が溶出される。
流速:8.0ml/分
勾配:A 0→25% 100分 B(A:20mM Tis pH7.5, B:A+1M NaCl)
コラム:セファクリル S−300(HiPrep 120ml, GE Healthcare)
流速:0.6ml/分。
実施例4および5で製造した免疫グロブリンFc−3 arm PEG−FSH(N)結合体および免疫グロブリンFc−3 arm PEG−インスリン(N)結合体を用いて、3 arm PEG結合体と2 arm PEG結合体との製造収率を比較した(表3)。
5K プロピオンALD(3)PEG(プロピオンアルデヒド基を3つ有しているPEG、NOF、日本)を免疫グロブリンFcのN−末端にペグ化させるために、免疫グロブリンFcとPEGのモル比を1:2、免疫グロブリンFc濃度を6mg/mlとし、4℃で4.5時間反応させた。この時の反応は、pH6.0の100mM濃度のリン酸カリウム緩衝液中で行われ、還元剤の20mM SCB(NaCNBH3)を添加して反応させた。反応液は、ソースQ(LRC25 85ml、GE Healthcare)を介してモノペグ免疫グロブリンのFcを精製した。その後、FVIIaと免疫グロブリンFc−5K PEGのモル比を1:9、全蛋白質濃度を20mg/mlにし、4℃で18時間反応させた。反応液は、100mM リン酸カリウム pH6.0であり、還元剤の20mM SCBを添加した。カップリング反応液は、2つの精製コラムを経て精製される。まず、カップリング反応に参与していない多量の免疫グロブリンFc−5Kを除去するために、ソース Q(LRC25 85ml、GE Healthcare)を用いた。20mM トリス(pH7.5)で、1M 塩化ナトリウム(Nacl)を用いて塩勾配を与えると、相対的に結合力の弱い免疫グロブリンFc−5Kが先に溶出され、免疫グロブリンFc−3 arm PEG−FVIIaが溶出される。以後、免疫グロブリンFc−3 arm PEG−FVIIaとFVIIa多量体不純物を除去するために、リソースISO(GE Healthcare)コラムで2次精製を行った。免疫グロブリンFc−3 arm PEG−FVIIaが先に溶出され、続いてFVIIa多量体不純物が溶出される。
流速:4ml/分
勾配:A 0→7% 1分 B、7%→37% 80分 B(A:20mM Tris pH7.5, B:A+1M NaCl)
コラム:リソースISO(Pre-packed 1ml, GE Healthcare)
流速:2ml/分
勾配:B 100→0% 60分 A(A:20mM Tris pH7.5, B:A+1.6M (NH4)2SO4)。
免疫グロブリンFc−3 arm PEG−オクトレオチド(N)をSDラットに皮下投与して試験動物の体重変化と、試験動物での試験物質によるIGF−1の変化を測定した。オクトレオチドは、強力な成長ホルモン抑制剤であって、末端肥大症(acromegaly)を適応症として置いており、速効性製品であるサンドスタチンと持続型製剤であるサンドスタチン−LAR(Novatis)で市販されている。末端肥大症は、hGHの過分泌によって成長抑制が阻害される現象である。オクトレオチドの生体内試験としてラットGHの分泌低下で体重増加の抑制およびGHの減少によるラットのIGF−1の変化を測定する試験が用いられており、免疫グロブリンのFc−3 arm PEG−オクトレオチド(N)の効能もラットの体重変化およびIGF−1の変化を測定する試験として進行された。試験物質は、免疫グロブリンのFc−3 arm PEG−オクトレオチド(N)を0.5、1.0、2.0mg/kg用量で単回投与し、対照物質としてサンドスタチン−LARを1.0、2.0mg/kgで単回投与して2週間での変化を測定した。2つの試験物質のいずれも皮下投与で進行された。
免疫グロブリンFc−3 arm PEG−FSH(N)の生体内効力の測定は、Steelman and Pohley試験法(Endocrinology 53、504-616)に基づいて行われた。詳細には、免疫グロブリンFc−3 arm PEG−FSH(N)の生体内効果を測定するために、未成熟雌SDラット(21日齢)が使用された。試験物質は、免疫グロブリンFc−3 arm PEG−FSH(N)を0.018、0.075、0.3ug/rat容量で単回投与し、対照物質として天然型市販品であるFollitropeを4、2、1IU/ratの容量で3日間毎日投与した。ビークル(vehicle)投与群と試験物質投与群のいずれも13.3U/rat容量のhcG(human chorionic gonadotropin)を併用投与した。各試験物質は、いずれも0.25mL/kg投与液量で皮下投与された。試験物質の最初の投与後72時間後に、試験動物などを安楽死させ、卵巣を摘出し、各試験動物で卵巣の重量を測定した。
Claims (25)
- 生理活性ポリペプチド、免疫グロブリンFc領域である二量体蛋白質、及び3つの官能基を有する非ペプチド性重合体を含み、前記の非ペプチド性重合体の2つの官能基は前記の二量体蛋白質の2つのN−末端に共有結合し、かつ、その第3の官能基は前記の生理活性ポリペプチドに共有結合している蛋白質結合体。
- 前記の免疫グロブリンFc領域が非糖鎖化されたものである、請求項1に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がCH1、CH2、CH3およびCH4ドメインからなる群より選択される1〜4つの相異したドメインからなる、請求項1に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がヒンジ領域をさらに含む、請求項3に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がIgG、IgA、IgD、IgE、IgM、それらの組み合わせおよびそれらのハイブリッドのFc領域からなる群より選択される、請求項1に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がIgG1、IgG2、IgG3、IgG4、それらの組み合わせおよびそれらのハイブリッドのFc領域からなる群より選択される、請求項5に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域が、同一起源のドメインからなる糖鎖免疫グロブリンから構成される二量体または多量体(免疫グロブリンFcの組み合わせ)である、請求項5に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がIgG4 Fc領域である、請求項5に記載の蛋白質結合体。
- 前記の免疫グロブリンFc領域がヒト非糖鎖化IgG4 Fc領域である、請求項8に記載の蛋白質結合体。
- 前記の非ペプチド性重合体が、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−プロピレングリコール共重合体、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、ポリビニルアルコールエチルエーテル、ポリ乳酸、ポリ乳酸−グリコール酸、生分解性高分子、脂質重合体、キチン類、ヒアルロン酸およびそれらの組み合わせからなる群より選択される、請求項1に記載の蛋白質結合体。
- 前記の非ペプチド性重合体がポリエチレングリコールである、請求項10に記載の蛋白質結合体。
- 前記の非ペプチド性重合体の官能基がアルデヒド群、プロピオンアルデヒド群、ブチルアルデヒド群、マレイミド群およびスクシンイミド誘導体からなる群より選択される、請求項1に記載の蛋白質結合体。
- 前記の非ペプチド性重合体が三末端に反応アルデヒド群の官能基を有する、請求項12に記載の蛋白質結合体。
- 前記の非ペプチド性重合体の三末端が、それぞれ免疫グロブリンFc領域と生理活性ポリペプチドのN−末端、リジン残基、ヒスチジン残基およびシステイン残基から構成される群より選択される官能基に結合されている、請求項1に記載の蛋白質結合体。
- 前記の生理活性ポリペプチドが、ホルモン、サイトカイン、インターロイキン、インターロイキン結合蛋白質、酵素、抗体、成長因子、転写調節因子、血液因子、ワクチン、構造蛋白質、リガンド蛋白質、受容体、細胞表面抗原および受容体拮抗物質からなる群より選択される、請求項1に記載の蛋白質結合体。
- 前記の生理活性ポリペプチドが、ヒト成長ホルモン、成長ホルモン放出ホルモン、成長ホルモン放出ペプチド、インターフェロン類、インターフェロン受容体類、コロニー刺激因子類、グルカコン様ペプチド類、エキセンディン−4−ペプチド類、ANP、BNP、CNP、DNP、G蛋白質共役型受容体(G-protein-coupled receptor)、インターロイキン類、インターロイキン受容体類、酵素類、インターロイキン結合蛋白質類、サイトカイン結合蛋白質類、マクロファージ活性因子、マクロファージペプチド、B細胞因子、T細胞因子、蛋白質A、アレルギー抑制因子、細胞壊死糖蛋白質、免疫毒素、リンポ毒素、腫瘍壊死因子、腫瘍抑制因子、転移成長因子、アルファ−1アンチトリプシン、アルブミン、α−ラクトアルブミン、アポリポ蛋白質−E、赤血球生成因子、高糖鎖化赤血球生成因子、アンジオポエチン類、ヘモグロビン、トロンビン、トロンビン受容体活性ペプチド、トロンボモジュリン、血液因子VII、VIIa、VIII、IX、およびXIII、プラズミノゲン活性因子、フィブリン−結合ペプチド、ウロキナーゼ、ストレプトキナーゼ、ヒルジン、蛋白質C、C−反応性蛋白質、レニン抑制剤、コラゲナーゼ抑制剤、スーパーオキシドジスムターゼ、レプチン、血小板由来成長因子、上皮細胞成長因子、表皮細胞成長因子、アンギオスタチン、アンギオテンシン、骨形成成長因子、骨形成促進蛋白質、カルシトニン、インスリン、ソマトスタチン、オクトレオチド(ソマトスタチンアゴニスト)、アトリオペプチン、軟骨誘導因子、エルカトニン、結合組織活性因子、組織因子経路抑制剤、卵胞刺激ホルモン、黄体形成ホルモン、黄体形成ホルモン放出ホルモン、神経成長因子類、副甲状腺ホルモン、レラキシン、セクレチン、ソマトメジン、インスリン様成長因子、副腎皮質ホルモン、グルカゴン、コレシストキニン、膵臓ポリペプチド、ガストリン放出ペプチド、コルチコトロピン放出因子、甲状腺刺激ホルモン、オートタキシン、ラクトフェリン、ミオスタチン、受容体類、受容体拮抗物質、細胞表面抗原、ウイルス由来ワクチン抗原、モノクローナル抗体、ポリクローナル抗体、および抗体断片類からなる群より選択される、請求項15に記載の蛋白質結合体。
- 前記の生理活性ポリペプチドが、ヒト成長ホルモン、インターフェロン−α、インターフェロン−β、顆粒球コロニー刺激因子、赤血球生成因子、エキセンディン−4、イミダゾールアセチルエキセンディン−4ペプチド(エキセンディン−4アゴニスト)、カルシトニン、オクトレオチド(ソマトスタチンアゴニスト)、BNPおよびFab’抗体断片からなる群より選択される、請求項16に記載の蛋白質結合体。
- (1)三末端の官能基を有する非ペプチド性重合体の三末端官能基のうち、二末端官能基を免疫グロブリンFc領域である二量体蛋白質のN−末端アミノ基に共有結合で連結する段階;
(2)前記の(1)で製造された反応混合物から非ペプチド性重合体と連結された前記二量体蛋白質を含む連結体を分離する段階;および
(3)前記の分離された連結体の非ペプチド性重合体の反対側の末端に生理活性ポリペプチドを共有結合で連結する段階を含む、生理活性ポリペプチド、免疫グロブリンFc領域である二量体蛋白質、及び3つの官能基を有する非ペプチド性重合体から構成され、前記の生理活性ポリペプチドおよび二量体蛋白質が、非ペプチド性重合体を介してそれぞれ連結された、蛋白質結合体の製造方法。 - 前記の非ペプチド性重合体が三末端にアルデヒド官能基を有することを特徴とする、請求項18に記載の蛋白質結合体の製造方法。
- 前記の段階(1)で二量体蛋白質と非ペプチド性重合体との反応モル比が1:2〜1:5である、請求項18に記載の蛋白質結合体の製造方法。
- 前記の段階(3)の段階(2)で収得された二量体蛋白質を含む連結体と生理活性ポリペプチドとの反応モル比が1:0.5〜1:0.05である、請求項18に記載の蛋白質結合体の製造方法。
- 前記の段階(1)および段階(3)の反応が還元剤の存在下で行われる、請求項18に記載の蛋白質結合体の製造方法。
- 前記の還元剤が、シアノ水素化ホウ素ナトリウム(NaCNBH3)、水素化ホウ素ナトリウム、ジメチルアミンホウ酸塩およびピリジンホウ酸塩からなる群より選択される、請求項22に記載の蛋白質結合体の製造方法。
- 請求項1乃至17のいずれか一項に記載の蛋白質結合体および薬学的に許容可能な賦形剤を含む、薬剤学的組成物。
- 請求項18乃至23のいずれか一項に記載の製造方法によって生成された、蛋白質結合体。
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