JP2020534016A - グルカゴン様ペプチド1受容体アゴニストおよびそれらの使用 - Google Patents
グルカゴン様ペプチド1受容体アゴニストおよびそれらの使用 Download PDFInfo
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Classifications
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
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- A61K31/33—Heterocyclic compounds
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- A61K31/54—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
- A61K31/5415—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame ortho- or peri-condensed with carbocyclic ring systems, e.g. phenothiazine, chlorpromazine, piroxicam
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
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- C07K16/2869—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against hormone receptors
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- C07K2319/00—Fusion polypeptide
Abstract
Description
「グルカゴン様ペプチド1」とも呼ばれる用語「GLP1」は、栄養摂取後に腸管L細胞から放出される31アミノ酸のペプチドホルモンを指す。GLP1はGLP1受容体と結合し、膵臓β細胞からのグルコース応答性インスリン分泌を増強し、インスリン発現を増加させ、β細胞アポトーシスを阻害し、β細胞新生を促進し、グルカゴン分泌を低減し、胃内消化時間を遅延し、飽満を促進し、末梢グルコース処理能を増大させる。特定実施形態では、用語「GLP1」は、完全長GLP1ペプチド(配列番号3)のアミノ酸7〜37を含む、成熟型31アミノ酸のペプチドホルモン(配列番号4)を指す。この用語はGLP1の変異体も含み、これらの変異体は1、2、3、4、5または6個のアミノ酸置換、付加または欠失を含む。例えばこの用語は、配列番号5、6、7、または8のアミノ酸配列を含む変異体を含む。
本発明のGLP1受容体アゴニストは、記載したGLP1受容体アゴニストのアミノ酸配列と異なるアミノ酸配列を有するが、GLP1受容体と結合する能力は保持するタンパク質を包含する。このような変異体GLP1受容体アゴニストは、親配列と比較したときアミノ酸の1つまたはそれ以上の付加、欠失、または置換を含むが、記載したGLP1受容体アゴニストのそれとほぼ等しい生物活性を示す。同様に、本発明のGLP1受容体アゴニストコードDNA配列は、開示配列と比較したときヌクレオチドの1つまたはそれ以上の付加、欠失、または置換を含むが、本発明のGLP1受容体アゴニストと生物学的にほぼ同等であるGLP1受容体アゴニストをコードする配列を包含する。
一般に、本発明のGLP1受容体アゴニストはGLP1受容体と結合することによって機能し、結合時にGLP1受容体の活性化を助長する。特定実施形態では、本発明のタンパク質はGLP1受容体と高いアフィニティーで結合する。例えば本発明は、例えば本明細書中の実施例2中で定義したアッセイ形式を使用し、ルシフェラーゼアッセイにより測定して(例えば、25℃または37℃で)GLP1受容体の活性化をもたらすGLP1受容体アゴニストを含む。特定実施形態では、GLP1受容体アゴニストは、例えば本明細書中の実施例2中で定義したアッセイ形式、または実質的に類似したアッセイを使用し、ルシフェラーゼアッセイにより測定して10nM未満、500pM未満、または250pM未満のEC50でGLP1受容体を活性化する。
本発明は、本発明のGLP1受容体アゴニストを含む治療用組成物を提供する。本発明による治療用組成物を、製剤中に取り込まれた適切な担体、賦形剤、および他の作用物質と共に投与して、改善された移動性、送達性、耐性などをもたらす。多数の適切な製剤を、全ての製薬化学者に知られている処方集:Remington’s Pharmaceutical Sciences、Mack Publishing Company、Easton、PA中に見ることができる。これらの製剤は、例えば粉末、ペースト、軟膏、ゼリー、ワックス、油、脂質、(カチオン性またはアニオン性)脂質含有小胞(LIPOFECTIN(商標)など)、DNAコンジュゲート、無水吸収性ペースト、水中油型および油中水型エマルション、エマルションカルボワックス(様々な分子量のポリエチレングリコール)、半固形ゲル、およびカルボワックス含有半固形混合物を含む。Powellら、「Compendium of excipients for parenteral formulations」PDA(1998年)J Pharm Sci Technol52:238〜311頁も参照。
本発明のGLP1受容体アゴニストは、糖尿病などの高血糖症と関係がある疾患もしくは障害もしくは状態の治療、および/または予防、および/またはこのような疾患、障害もしくは状態と関係がある少なくとも1つの症状の軽減に有用である。一実施形態では、本発明のGLP1受容体アゴニストを、糖尿病(例えば、2型糖尿病)がある患者に治療用量で投与することができる。
併用療法剤は、本発明のGLP1受容体アゴニスト、および本発明のGLP1受容体アゴニスト、またはその本発明の生物活性断片と有利に併用することができる任意の他の治療剤を含むことができる。本発明のGLP1受容体アゴニストは、高血糖症(例えば糖尿病)と関係がある任意の疾患または障害を治療するのに使用される1つまたはそれ以上の薬物または治療剤と相乗的に併用することができる。幾つかの実施形態では、本発明のGLP1受容体アゴニストを第2の治療剤と併用して、対象における血糖レベルを低減することができ、または糖尿病の1つまたはそれ以上の症状を軽減することができる。
特定実施形態に従い、一回用量の本発明のGLP1受容体アゴニスト(またはGLP1受容体アゴニストと本明細書で言及する任意の他の治療活性成分の組合せを含む医薬組成物)を、それを必要とする対象に投与することができる。本発明の特定実施形態に従い、複数用量の本発明のGLP1受容体アゴニスト(またはGLP1受容体アゴニストと本明細書で言及する任意の他の治療活性成分の組合せを含む医薬組成物)を、規定の時間行程にわたり対象に投与することができる。本発明のこの態様に従う方法は、複数用量の本発明のGLP1受容体アゴニストを対象に逐次的に投与する工程を含む。本明細書中で使用する「逐次的に投与する」は、異なる時間地点で、例えば所定間隔(例えば数時間、数日間、数週間または数カ月)隔てた異なる日に、各用量のGLP1受容体アゴニストを対象に投与することを意味する。本発明は、1回の初回用量のGLP1受容体アゴニスト、次に1回またはそれ以上の二次用量のGLP1受容体アゴニスト、および場合により次に1回またはそれ以上の三次用量のGLP1受容体アゴニストを患者に逐次的に投与する工程を含む方法を含む。
本発明の方法に従い対象に投与されるGLP1受容体アゴニストの量は、一般に治療有効量である。本明細書中で使用する語句「治療有効量」は、(a)正常レベル(例えば、80〜130mg/dLの食前血中グルコースレベル)への高血糖レベルの低減、および/または(b)糖尿病の1つまたはそれ以上の症状または徴候の検出可能な改善の、1つまたはそれ以上をもたらすGLP1受容体アゴニストの量を意味する。
実施形態1では、本発明は、(i)N末端へのアミノ酸の付加、および(ii)ペプチド配列からのアミノ酸の欠失からなる群から選択される少なくとも1つのアミノ酸修飾がある成熟GLP1(7〜37)(配列番号4)を含むグルカゴン様ペプチド1(GLP1)変異体であって、タンパク質分解切断に対する高い耐性および/または高い血中グルコース低下能力を有するGLP1変異体を提供する。
酵素ジペプチジルペプチダーゼ4(DPP4)によるその急速な不活性化のため、GLP1(7〜37)は非常に短い循環半減期(1〜2分)を有する。以前の研究は、GLP1(7〜37)の位置8における様々なアミノ酸置換によってDPP4に対する耐性が高まり、それによってさらに長い半減期をもたらすことを示した(Deaconら、1998年、Diabetologia41:271〜278頁)。しかしながら、これらの分子のDPP4切断に対する感受性は残る。したがって、DPP4に対してより一層の耐性がある、新たな分子を開発する必要がある。
HAEGTFTSDVSSYLEGQAAKEFIAWLVKGRG(配列番号4)を有する。
・アミノ酸配列HEGTFTSDVSSYLEGQAAKEFIAWLVKGRG(配列番号5)を含むDes−Ala−GLP1
・アミノ酸配列QHAEGTFTSDVSSYLEGQAAKEFIAWLVKGRG(配列番号6)を含むQ−GLP1
・アミノ酸配列AHAEGTFTSDVSSYLEGQAAKEFIAWLVKGRG(配列番号7)を含むA−GLP1
・アミノ酸配列AEGTFTSDVSSYLEGQAAKEFIAWLVKGRG(配列番号8)を含むdesH−GLP1
・mAb1の軽鎖のN末端と融合したDes−Ala−GLP1−mAb1:Des−Ala−GLP1(配列番号5)
・mAb1の軽鎖のN末端と融合したQ−GLP1−mAb1:Q−GLP1(配列番号6)
・mAb1の軽鎖のN末端と融合したA−GLP1−mAb1:A−GLP1(配列番号7)
・GLP1−hFc(配列番号9)
・A−GLP1−hFc(配列番号10)
・Q−GLP1−hFc(配列番号11)
・Des−Ala−GLP1−hFc(配列番号12)
・desH−GLP1−hFc(配列番号13)
コンパレーター:Glaesnerら、2010年(Diabetes Metab.Res.Rev.26:287〜296頁)中に開示された、hIgG4Fcドメインと融合したLY2189265のアミノ酸配列特性を有するGLP1アナログ(デュラグルチド;Eli Lilly)を、以下の実施例中でコンパレーター(配列番号14)として使用した。
cAMPに応答するcreプロモーターの制御下でヒトGLP1受容体およびルシフェラーゼコード配列を安定的に発現するレポーター細胞株293/FSC11/Cre−Lucにおいて、cAMP生成を刺激するそれらの能力に関してGLP1融合タンパク質を試験した。
血中グルコースおよびグルコース抵抗性に対する抗GLP1R抗体の軽鎖のN末端と融合したQ−GLP1(Q−GLP1−mAb1)の影響を、ヒトGLP1Rタンパク質を発現する遺伝子操作型マウス(「GLP1Rヒト化マウス」)において決定した。31匹のGLP1Rヒト化マウスを、7〜8匹の動物の4群に分けた。各群に、194nmol/kgでアイソタイプ対照、Q−GLP1−hFc、mAb1、またはQ−GLP1−mAb1を一回皮下注射した。マウスは第0、1、4、7、11、14、16、18日に飼育状態で出血させ、第22日に血中グルコースを測定した。各時間地点での血中グルコースレベルの平均±SEMを各群に関して計算し、それを表2中に示す。
様々なGLP1変異体および融合タンパク質の安定性を、血中プロテアーゼとそれらをインキュベートし、質量分析によって切断ペプチドを分析することにより試験した。
血清酵素による切断に対する各構築物の感受性を特徴付けるため、各構築物に関して完全ペプチド(N末端ペプチド)、切断ペプチド(切断後のN末端ペプチド)、および1つの内部参照ペプチド(構築物における如何なる修飾にも影響を受けない安定ペプチド)をナノLC−MS/MSによってモニタリングした。完全ペプチドと参照ペプチドの低減した比、および切断ペプチドと参照ペプチドの付随的に増大した比は、経時的な構築物の酵素媒介切断を示唆した。以下の式:100×切断ペプチドの面積/(切断ペプチドの面積+非切断ペプチドの面積)を使用して切断率を計算した。
Claims (24)
- グルカゴン様ペプチド1(GLP1)変異体を含む融合タンパク質であって、該GLP1変異体がN末端にアミノ酸の付加がある成熟GLP1(7〜37)(配列番号4)を含み、該融合タンパク質がタンパク質分解切断に対する高い耐性および/または高い血中グルコース低下能力を有する、前記融合タンパク質。
- アミノ酸がアラニン(Ala)およびグルタミン(Gln)からなる群から選択される、請求項1に記載の融合タンパク質。
- アミノ酸がGlnを含む、請求項1または2に記載の融合タンパク質。
- GLP1変異体が配列番号6および7からなる群から選択されるアミノ酸配列を含む、請求項1〜3のいずれか1項に記載の融合タンパク質。
- GLP1変異体が配列番号6のアミノ酸配列を含む、請求項1〜4のいずれか1項に記載の融合タンパク質。
- 安定型ドメインをさらに含み、該安定型ドメインが、GLP1受容体と特異的に結合し重鎖可変領域(HCVR)と軽鎖可変領域(LCVR)を含む抗原結合性タンパク質またはその抗原結合性断片である、請求項1〜5のいずれか1項に記載の融合タンパク質。
- GLP1変異体が抗原結合性タンパク質またはその抗原結合性断片のHCVRのN末端またはC末端と融合した、請求項6に記載の融合タンパク質。
- GLP1変異体が抗原結合性タンパク質またはその抗原結合性断片のLCVRのN末端またはC末端と融合した、請求項6に記載の融合タンパク質。
- 安定型ドメインが抗体またはその断片である、請求項6〜8のいずれか1項に記載の融合タンパク質。
- 安定型ドメインと融合したグルカゴン様ペプチド1(GLP1)変異体を含む融合タンパク質であって、(i)該GLP1変異体がN末端にグルタミン(Gln)の付加がある成熟GLP1(7〜37)(配列番号4)を含み、(ii)該安定型ドメインがGLP1受容体と特異的に結合する抗原結合性タンパク質またはその抗原結合性断片であり、かつ(iii)該融合タンパク質がタンパク質分解切断に対する高い耐性および/または高い血中グルコース低下能力を有する、前記融合タンパク質。
- 安定型ドメインがHCVRおよびLCVRを含む抗体またはその抗原結合性断片である、請求項10に記載の融合タンパク質。
- GLP1変異体が抗体またはその抗原結合性断片のLCVRのN末端と融合した、請求項11に記載の融合タンパク質。
- GLP1変異体が配列番号6のアミノ酸配列を含む、請求項10〜12のいずれか1項に記載の融合タンパク質。
- 請求項1〜13のいずれか1項に記載の融合タンパク質および薬学的に許容される担体または希釈剤を含む医薬組成物。
- 請求項1〜13のいずれか1項に記載の融合タンパク質をコードするポリヌクレオチド配列を含む単離ポリヌクレオチド分子。
- 請求項15に記載のポリヌクレオチド配列を含むベクター。
- 請求項16に記載のベクターを発現する細胞。
- 血糖レベルを低減する方法であって、それを必要とする対象に、請求項1〜13のいずれか1項に記載のタンパク質を治療有効量含む医薬組成物を投与する工程を含む、前記方法。
- 対象が、糖尿病、肥満症、インスリン抵抗性、高血圧、脂質異常症、2型糖尿病、1型糖尿病、前糖尿病、心血管疾患、アテローム性動脈硬化症、うっ血性心不全、冠動脈性心疾患、動脈硬化症、末梢動脈疾患、脳卒中、呼吸機能障害、腎疾患、脂肪肝疾患、非アルコール性脂肪性肝炎(NASH)、およびメタボリックシンドロームからなる群から選択される疾患または障害を有する、請求項18に記載の方法。
- 2型糖尿病の少なくとも1つの症状、兆候または合併症を予防、治療または軽減する方法であって、それを必要とする対象に、請求項1〜13のいずれか1項に記載のタンパク質を治療有効量含む医薬組成物を投与する工程を含む、前記方法。
- 少なくとも1つの症状、徴候または合併症が、高血糖レベル、過剰な喉の渇き、頻尿、尿中ケトン体の存在、疲労、体重変動、かすみ目、治癒が遅い痛み、頻繁な感染、歯肉の腫れまたは圧痛、肥満症、心疾患、脳卒中、腎疾患、眼部疾患、神経損傷および高血圧からなる群から選択される、請求項20に記載の方法。
- 第2の治療剤または治療と組み合わせて医薬組成物を投与する、請求項18〜21のいずれか1項に記載の方法。
- 第2の治療剤または治療が、インスリンまたはインスリンアナログ、メトホルミン、チアゾリジンジオン、スルホニルウレア、ビグアニド、クロプロパミド、グリニド、αグルコシダーゼ阻害薬、ナテグリニド、DPP4阻害薬、プラムリンチド、シタグリプチン、ブロモクリプチン、SGLT2阻害薬、カナグリフロジン、降圧薬、スタチン、アスピリン、食生活改善、エクササイズ、および栄養補助食品からなる群から選択される、請求項22に記載の方法。
- 医薬組成物を皮下、静脈内、皮内、腹腔内、経口、または筋肉内投与する、請求項18〜23のいずれか1項に記載の方法。
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US11045522B2 (en) | 2021-06-29 |
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AU2018338178B2 (en) | 2023-06-08 |
US20190091296A1 (en) | 2019-03-28 |
AU2018338178A1 (en) | 2020-04-02 |
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EP3684793A1 (en) | 2020-07-29 |
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US11779633B2 (en) | 2023-10-10 |
IL304574A (en) | 2023-09-01 |
CA3073964A1 (en) | 2019-03-28 |
US20240024428A1 (en) | 2024-01-25 |
US20210283225A1 (en) | 2021-09-16 |
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