JP6297969B2 - 部位特異的モノpeg化エキセンジン類似体およびその調製方法 - Google Patents
部位特異的モノpeg化エキセンジン類似体およびその調製方法 Download PDFInfo
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- MASNOZXLGMXCHN-ZLPAWPGGSA-N glucagon Chemical compound C([C@@H](C(=O)N[C@H](C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(O)=O)C(C)C)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CO)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@@H](NC(=O)CNC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](N)CC=1NC=NC=1)[C@@H](C)O)[C@@H](C)O)C1=CC=CC=C1 MASNOZXLGMXCHN-ZLPAWPGGSA-N 0.000 description 1
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- 229940093181 glucose injection Drugs 0.000 description 1
- 125000003630 glycyl group Chemical group [H]N([H])C([H])([H])C(*)=O 0.000 description 1
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- A61K47/60—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 organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
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- C—CHEMISTRY; METALLURGY
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- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/575—Hormones
- C07K14/57563—Vasoactive intestinal peptide [VIP]; Related peptides
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
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- C07—ORGANIC CHEMISTRY
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- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
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Description
本発明は、部位特異的モノPEG化エキセンジン類似体、調製方法、および薬学的使用に関する。
本発明は、部位特異的モノPEG化エキセンジン類似体を調製するための方法、および記載した方法によって調製される部位特異的モノPEG化エキセンジン類似体を提供するものである。
(1)エキセンジン−4類似体のペプチド原料を合成するステップであって、
ペプチドの一部のリシン残基を、保護基のDdeによって保護し、ここで、Ddeは、N−α−1−(4,4−ジメチル−2,6−ジオキソシクロヘキシ−1−イリデン)エチル(N−α−1−(4,4−dimethyl−2,6−dioxocyclohex−1−ylidene)ethyl)であるステップ、
(2)ペプチド材料とポリエチレングリコール試薬との反応をアルカリ性有機溶媒中で行い、Ddeを有していないLys残基をポリエチレングリコール基と結合させるステップ、
(3)ステップ(2)によって製造された生成物の保護基を除去し、分離し精製した後、PEG化エキセンジン類似体を得るステップ
を含む、部位特異的モノPEG化エキセンジン類似体を調製するための方法を提供する。
(X)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Y1−Gln−Z−Glu−Glu−Glu−Ala−Val−Y2−Leu−Phe−Ile−Glu−Trp−Leu−Y3−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Y4、
(式中、XはFmocまたはDdeであり、ZはLeuまたはIleであり、Y1〜Y4はLysまたは(Dde)Lysであり、Y1〜Y4の少なくとも1つはLysであり、好ましくは、Y1〜Y4のうちで、Y2〜Y4のうちの1つだけがLysであり、残りが(Dde)Lysであり、より好ましくは、Y2はLysであり、Y1、Y3、およびY4は(Dde)Lysである。)
以下の手順による、部位特異的モノPEG化エキセンジン−4類似体の調製および精製。
1.保護基を有するエキセンジン−4類似体の合成
PEG化がN末端アミノ基において起こる場合、保護基を有する以下の構造のエキセンジン−4類似体が合成される:
His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lys
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lysまたは
(Dde)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lys;
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lysまたは
(Dde)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lys;
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lysまたは
(Dde)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lys;
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Lys、または
(Dde)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Lys;
His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−Lys−Leu−Phe−Ile−Glu−Trp−Leu−Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Lys、
(式中、ZはLeu(配列番号1)またはIle(配列番号2)であり、1つのLys残基のアミノ基はポリエチレングリコールに結合している。)
Fmoc−His(Trt)−OH、Dde−His(Trt)−OH、Fmoc−Ala−OH、Fmoc−Gly−OH、Fmoc−Glu(OtBu)−OH、Fmoc−Thr(tBu)−OH、Fmoc−Phe−OH、Fmoc−Ser(tBu)−OH、Fmoc−Asp(OtBu)−OH、Fmoc−Leu−OH、Fmoc−Lys(Boc)−OH、Fmoc−Lys(Dde)−OH、Fmoc−Gln(Trt)−OH、Fmoc−Val−OH、Fmoc−ILe−OH、Fmoc−Trp(Boc)−OH、Fmoc−Asn(Trt)−OH、Fmoc−Pro−OH、Fmoc−Cys(Trt)−OH
上記の略語は次のとおりである。Fmocは9−フルオレニル−メトキシカルボニル、Bocはtert−ブトキシカルボニル基、Trtはトリチル、OtBuはtert−ブトキシ、tBuはtert−ブチル、DdeはN−α−1−(4,4−ジメチル−2,6−ジオキソシクロヘキシ−1−イリデン)エチル
A.合成:0.25mmolの規模で例示すると、リンクアミド樹脂0.5gおよびDIC/HOBt法を用いて活性化しておいたアミノ酸1mmolの存在下、反応器中でC末端からN末端に向かって配列を合成した。25℃の室温で反応を行い、この工程は以下のように実施した。
1.20%ピペリシンDMF溶液を用いることによって、保護基Fmocを除去した。各工程につき10分。
2.10mLのDMFを用いて3回洗浄し、液体を捨てる。
3.保護されたアミノ酸(1mmol)およびHOBt(1mmol)を10mLのDMFに溶解し、活性化するためにDIC(1mmol)を10分間添加した。
4.活性化されたアミノ酸の溶液を反応器に添加し、1時間振盪した。
5.DMFを用いて3回洗浄し、液体を捨てる。
6.ニンヒドリン反応が陰性である場合、続いてステップ1〜5を繰り返すべきである。陽性である場合、ステップ3〜5を繰り返す。
ペプチド鎖の合成を完了した後、メタノールで樹脂を洗浄し、それを乾燥させる。
ペプチドが結合した樹脂1gを反応器に添加し、次いで、溶解溶液(比率:アニソール2ml、メタノール2ml、トリイソプロピルシラン2ml、およびトリフルオロ酢酸6ml)を添加した。
得られた粗生成物を少量の10%酢酸溶液に溶解し、カラムに載せ、分取HPLCによって精製し、次いで凍結乾燥した。質量分析法によって、得られたペプチドが必要とされる化合物であることを証明した。
勾配:10% 0.05% TFA/CAN−45% 0.05% TFA/CAN 20分、45% 0.05% TFA/CAN 10分。
本実施形態では、エキセンジン−4類似体上のPEG化できる唯一の遊離側鎖アミノ基に結合し修飾するために、従来のアミノPEG誘導体、例えば、(SC−PEG、SS−PEG、NHS−PEGなど)を使用した。ここで、PEG誘導体は、好ましくは40KD Y型NHS−PEGから選択され、部位特異的に保護されたエキセンジン−4類似体は、
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−(Dde)Lysまたは
(Fmoc)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−(Dde)Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−(Dde)Lys−Leu−Phe−Ile−Glu−Trp−Leu−(Dde)Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Lys
である。
純粋なPEG化エキセンジン−4類似体原料は、部位特異的に保護されたエキセンジン−4類似体の最終反応溶液の逆相HPLC、イオン交換、限外ろ過、分子ふるい、および凍結乾燥によって得ることができる。
移動相:A相:20mM HAc、5%アセトニトリル;B相:20mM HAc、50%アセトニトリル
カラム:GE Fineline Pilot 35
充填剤:SOURCE 30RPC 175mL
流速:30mL/分
溶離勾配:試料を送達した後、カラム体積の2倍量で平衡化する。0〜30% 5分、30%〜100% 5分。
移動相:A相:10mM pH3.5 CBS
B1相:10mM pH3.5 CBS+0.15M NaCL
B2相:10mM pH3.5 CBS+1.5M NaCL
クロマトグラフィーのカラム:GE XK 50
充填剤:SPセファロース Fast Flow 600mL
流速:30mL/分
勾配溶離:0%〜100% B1相20分、100% B1相〜B2相100% 0分
装置:10KD PALL剪断限外ろ過
プレフィルター添加体積は2400mLであり、ろ過後は400mLであった。
限外濾過(1000mL〜400mL)を3回繰り返した。
移動相:水
クロマトグラフィーのカラム:GE XK 50
充填剤:G25;900mL
流速:30mL/分
試料の添加量:200mL
PEG化エキセンジン−4類似体純水溶液の共融点は約−5℃であり、したがって、1回目の凍結乾燥温度は−10℃に設定し、2回目は5℃に設定する。他のパラメーター(凍結時間およびオーブン温度など)は、試料の量、凍結乾燥器の性能、および個々の気候条件に応じて設定する。
(1)材料
動物:Shanghai SLACCAS Laboratory Animal Co.からSPFレベルのC57マウスを購入した。会社の一時的な動物飼育施設で動物を飼育した。CLクラス。量:60匹、性別:雄。
試薬:エキセンジン−4類似体(0.125ug/ml);PEG化エキセンジン−4類似体(3.125ug/ml、未修飾のペプチドに基づいて算出);グルコースキット;20%グルコース注射;および生理食塩水注射。
薬剤投与チーム:PEG化エキセンジン−4類似体(3.125ug/ml、未修飾の(bare)ペプチドに基づいて算出)を各マウスに投与した。投与量0.2mL/20gのブランク群;0.2mL/20gの投与量で生理食塩水を各マウスに注射した。対照群:0.2mL/20gの投与量でエキセンジン−4類似体(0.125ug/ml)を各マウスに投与した。血中グルコースを検査する30分前に、0.2ml/体重20gの20%グルコース溶液を腹腔内注射することによって、血中グルコース負荷を実現した。投与後24時間後および72時間後に、試験した動物の血糖降下効果の持続期間を観察した。
図6は、個々のPEG化エキセンジン−4類似体の血糖降下効果の持続期間を示す。
Claims (6)
- 以下のステップ:
(1)エキセンジン類似体のペプチド原料を合成するステップであって、前記ペプチド原料のリシン残基の一部は、N−α−1−(4,4−ジメチル−2,6−ジオキソシクロヘキシ−1−イリデン)エチルであるDdeによって保護されており、前記ペプチド原料が、保護されていないLys残基を1つだけ含む、ステップと、
(2)ステップ(1)に記載のペプチド原料をアルカリ性有機溶媒中でPEG誘導体と反応させて、保護されていないLys残基をポリエチレングリコール基と結合させるステップと、
(3)ステップ(2)で製造された生成物の保護基を除去し、前記生成物を単離、精製して、PEG化エキセンジン誘導体を得るステップと
を含む、PEG化エキセンジン類似体を調製するための方法{ここで、前記PEG化エキセンジン誘導体は、His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Lys−Gln−Z−Glu−Glu−Glu−Ala−Val−Lys−Leu−Phe−Ile−Glu−Trp−Leu−Lys−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Lys(式中、ZはLeu(配列番号1)またはIle(配列番号2)であり、1つのLys残基のアミノ基はポリエチレングリコールに結合している。)}。 - 前記ペプチド原料において、N末端がDdeまたはFmocによって保護されており、Fmocが9−フルオレニル−メトキシカルボニルである、請求項1に記載の方法。
- 前記ペプチド原料が以下の構造:(X)His−Gly−Glu−Gly−Thr−Phe−Thr−Ser−Asp−Leu−Ser−Y1−Gln−Z−Glu−Glu−Glu−Ala−Val−Y2−Leu−Phe−Ile−Glu−Trp−Leu−Y3−Asn−Gly−Gly−Pro−Ser−Ser−Gly−Ala−Pro−Pro−Pro−Ser−Y4、(式中、XはFmocまたはDdeであり、ZはLeuまたはIleであり、Y1〜Y4はLysまたは(Dde)Lysであり、Y1〜Y4の少なくとも1つはLysである)を有する、請求項1に記載の方法。
- Y1〜Y4において、Y2〜Y4のうちの1つだけがLysであり、残りが(Dde)Lysである、請求項3に記載の方法。
- Y2がLysであり、Y1、Y3、およびY4が(Dde)Lysである、請求項4に記載の方法。
- 請求項1から5の一項に記載の方法に従って調製した、PEG化エキセンジン類似体。
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