JP2019520789A - Gpr92の調節因子の同定方法 - Google Patents
Gpr92の調節因子の同定方法 Download PDFInfo
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- JP2019520789A JP2019520789A JP2018552234A JP2018552234A JP2019520789A JP 2019520789 A JP2019520789 A JP 2019520789A JP 2018552234 A JP2018552234 A JP 2018552234A JP 2018552234 A JP2018552234 A JP 2018552234A JP 2019520789 A JP2019520789 A JP 2019520789A
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- gpr92
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- gpr92 receptor
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Abstract
Description
本明細書は、さらに、EFSを介して2017年4月14日に本明細書とともに提出された配列表を参照により包含する。米国特許法施行規則1.52条(e)項(5)に準じて、「seqlistingGPR92.txt」で特定される配列表のテキストファイルは、14,567バイトであり、2017年4月14日に作成された。当該配列表は、本明細書とともに電子出願され、本明細書の範囲を逸脱するものではなく、したがって新規事項を含まない。
本明細書で使用される用語は、通常、本発明の文脈内で各用語が使用される具体的状況において、当技術分野における通常の意味を有する。特定の用語は、以下に、または本明細書の別の箇所で、本発明の方法および組成物の説明において実施者に付加的ガイダンスおよびそれらの作製または使用方法を提供するために説明される。
本開示の主題は、本開示の方法で使用するためのGPR92受容体を提供する。本開示のGPR92受容体は、これらに限定されないが、たとえば、ネコ、イヌまたはヒトの受容体などの哺乳類の受容体である。
本開示は、さらに、GPR92受容体の活性および/または発現を調節する化合物の同定方法を提供する。たとえば、これに限定するものではないが、調節因子は、アゴニストまたはアンタゴニストであり得る。本開示の主題は、上述のGPR92受容体の活性および/または発現を調節する化合物を同定するためのインシリコおよびインビトロ方法を提供する。
本開示の主題は、さらに、GPR92受容体と潜在的に相互作用する可能性のある、および/または、GPR92受容体の活性および/または発現を調節する化合物を同定するためのインシリコ方法を提供する。
本願は、たとえば、ネコ、イヌまたはヒトGPR92のGPR92受容体の活性を調節する化合物であって、該受容体の1または複数のアミノ酸と相互作用する化合物のスクリーニング方法を提供する。いくつかの実施形態において、GPR92受容体の結合部位は、受容体の7膜貫通(7TM)ドメイン内のアミノ酸を含み、本明細書に記載のとおり、インシリコモデリングを用いて受容体の相互作用マップを生成させることにより同定することができる。非限定的な一例において、7TM相互作用マップ中のアミノ酸の存在は、該残基がリガンド結合環境の近辺にあり、該リガンドと相互作用することを意味する。
3.3 インビトロ方法
本開示の主題は、さらに、GPR92受容体の活性および/または発現を調節する化合物を同定するインビトロ方法を提供する。
本実施例は、GPR92の推定調節因子を同定するためのネコおよびイヌGPR92のコンピュータによるモデリングを記述する。
本実施例は、ネコGPR92活性を調節する化合物を同定するためのインビトロアッセイを記述する。
最高パフォーマンスのCHO/natClytin/fGPR92クローンのK1.4を、リガンド薬理学およびアッセイ信頼性のために完全最適化した。得られた結果は、HTS目的に適したfGPR92のための機能的細胞系アッセイを示す。
2つの最良の2°L.Dクローン第2限界希釈クローンであるK1.2と1.4を、アゴニストEC50確認、DMSO効果、シグナル経時安定性、凍結/解凍のために最適化した。K1.4を、最終検定クローンとして選択し、次いで、マルチプレート中で信頼性および再現性を明らかにした(図19)。
14:0LPA用量反応(3μM、1μM、0.3μM、0.1μM、30nM、10nM、3nM、1nM)の0.5%DMSO添加タイロード溶液。
0.5%DMSO添加タイロードバッファ溶液(対照参照)および14:0LPA EC100値(3μM、シグナル参照)の0.5%DMSO添加タイロードバッファ溶液。
16:0LPA用量反応(10μM、3μM、1μM、0.3μM、0.1μM、30nM、10nM、3nM)の0.5%DMSO添加タイロード溶液。
0.5%DMSO添加タイロードバッファ溶液(対照参照)および16:0LPA EC100値(10μM、シグナル参照)の0.5%DMSO添加タイロードバッファ溶液。
ECX=[(X/100−X)1/傾き]*EC50
下記の式にしたがい、ロバストZプライム(rZ’)、最小(対照参照,CR)ウェルシグナルおよび最高(シグナル参照,SR)ウェルシグナルについて、プレート内ばらつきおよびプレート間ばらつきを算出した。
CHO/natClytin細胞を、natClytin発光タンパク質耐性として、5mLの100mMピルビン酸ナトリウム(BioWittaker cat.BE13−115E)、25mLの7.5%炭酸水素ナトリム(BioWittaker cat.BE17−613E)、6.5mLの1M Hepes(BioWittaker cat.BE17−737E)、5mLの100×ペニシリン/ストレプトマイシン(BioWittaker cat. DE17−602E)、50mLのウシ胎児血清(Euroclone cat. No.:ECS 0180L)および0.25mLの10mg/mLピューロマイシン(InvivoGen cat. Ant-pr-1)を添加した培地DMEM F−12(1:1)混合物(BioWittaker cat.BE04−687F/U1)で培養した。
標準増殖条件は、T75フラスコ中3×105細胞固定し、約8−10×106細胞/T75フラスコ(3−4日後)を回収することからなる。代わりに、70−80%コンフルエントな細胞集団を3−4日ごとに1:20−1:30希釈した。384MTPにおける実験のための標準播種条件は、10,000細胞/ウェルで播種し、24時間後に分析した。細胞を穏やかなPBS洗浄により分割し、次いでトリプシン−EDTA溶液とともに37℃で5分培養した。分離された細胞を完全培地で希釈し、BECKMAN COULTER Z1TM 粒子計数機を用いて計数し、所望数の細胞を新たなフラスコに固定するかまたは付着性実験に使用した。
タイロードバッファ/ハウス溶液(130mM NaCl、5mM KCl、2mM CaCl2、1mM MgCl2、5mM NaHCO3、20mM HepesのpH7.4水溶液;滅菌濾過し、加圧滅菌した。)。
実験作業は、ICCDカメラFLIPRTETRA(Molecular Devices社)を用いて行った。分析は、384ウェルポリスチレン検定プレート中で行った。細胞培養フラスコ:75cm2フラスコ CORNING,cat. 430641。試験プレート:384ウェル組織培養処理マイクロプレート(MTP),ブラック/透明底板:MATRIX cat. 4332。化合物プレート:384ウェル:ポリプロピレン検定プレート,V底:MATRIX,cat. 4312.
本開示の主題およびその利点を詳細に説明してきたが、添付の特許請求の範囲によって定義される本発明の主旨および範囲から逸脱することなく、本明細書においてさまざまな変更、置換および改変がなされ得ると理解されよう。さらに、本発明の範囲は、本明細書に記載された具体的な実施形態のプロセス、装置、製造および物質の組成、手段、方法および工程に限定されることを意図するものではない。本開示の主題の説明から当業者は容易に理解するとおり、本明細書に存在するか、または本明細書に開示された実施形態に対応して実質的に同等の機能を果たすかもしくは実質的に同等の結果を達成するものとして後から開発されるプロセス、装置、製造および物質の組成、手段、方法および工程は、本開示の主題にしたがい利用することができる。したがって、添付の特許請求の範囲は、そのようなプロセス、装置、製造、物質の組成、手段、方法またはステップをその範囲内に包含することが意図されている。
Claims (18)
- GPR92受容体の活性を調節する組成物を同定する方法であって、
(a)試験薬をGPR92受容体と接触させる工程、
(b)GPR92受容体の活性を決定する工程、および
(c)GPR92受容体の活性を増加させる試験薬を前記組成物として選択する工程
を含む方法。 - 前記GPR92受容体が、配列番号4のアミノ酸配列を含むネコGPR92受容体および配列番号5のアミノ酸配列を含むイヌGPR92受容体からなる群より選択される、請求項1に記載の方法。
- GPR92受容体の活性を調節する組成物を同定する方法であって、
(a)試験薬をGPR92受容体と接触させる工程、
(b)前記試験薬と、7膜貫通ドメイン(7TM)の1または複数のアミノ酸との相互作用を決定する工程、および
(c)1または複数の前記アミノ酸と相互作用する試験薬を前記組成物として選択する工程
を含む方法。 - 前記GPR92受容体が、配列番号4のアミノ酸配列を含むネコGPR92受容体および配列番号5のアミノ酸配列を含むイヌGPR92受容体からなる群より選択される、請求項3に記載の方法。
- 前記GPR92受容体が、ネコGPR92受容体であり、かつ前記方法が、前記試験薬と、ヘリックス2のArg83;ヘリックス3のGly103、Phe106、Gln107、Met110および/またはCys114;ヘリックス4のThr161および/またはHis165;ヘリックス5のAla200、Gly204および/またはPro208;ヘリックス6のPhe248、Phe252、Tyr255、Asn256および/またはLeu259;ヘリックス7のArg281、Met285および/またはVal288;および/または第2細胞外(EC2)ループのGlu182からなる群より選択される7TMの1または複数のアミノ酸との相互作用を決定する工程を含む、請求項3に記載の方法。
- 前記GPR92受容体が、イヌGPR92受容体であり、かつ前記方法が、前記試験薬と、ヘリックス2のArg76;ヘリックス3のGly96、Phe99、Gln100、Met103およびCys107;ヘリックス4のThr154およびHis158;ヘリックス5のAla193、Gly197およびPro201;ヘリックス6のPhe241、Phe245、Tyr248、Asn249およびLeu252;ヘリックス7のArg274、Met278およびVal281;ならびにEC2ループのGlu175からなる群より選択される7TMの1または複数のアミノ酸との相互作用を決定する工程を含む、請求項3に記載の方法。
- 工程(a)後に、前記GPR92受容体の活性を決定する工程をさらに含む、請求項3から6のいずれかに記載の方法。
- GPR92受容体リガンドを前記GPR92受容体に接触させる工程をさらに含む、請求項3から7のいずれかに記載の方法。
- 前記GPR92受容体の活性を増加させる試験薬を前記組成物として選択する工程(c)をさらに含む、請求項3から8のいずれかに記載の方法。
- 前記相互作用が、部位特異的突然変異誘発、X線結晶解析、X線分光分析、核磁気共鳴(NMR)、架橋結合評価、質量分析、電気泳動、置換分析、およびそれらの組み合わせにより決定される、請求項3から6のいずれかに記載の方法。
- GPR92受容体の活性を調節する組成物を同定する方法であって、
(a)GPR92受容体アゴニストをGPR92受容体と接触させ、該GPR92受容体の活性を決定する工程、
(b)試験薬を前記GPR92受容体と接触させ、該GPR92受容体の活性を決定する工程、および
(c)(b)の活性が(a)の活性より大きい時、前記試験薬を前記組成物として選択する工程
を含む方法。 - 前記GPR92受容体アゴニストが、NAG(N-アラキドノイルグリシン)、 FPP(3、7、11-トリメチル-2、6、10-ドデカトリエン-1-イル ピロホスファート)、 LPA(18:0)(1-ステアロイル-2-ヒドロキシ-sn-グリセロ-3-ホスファート)、CPA(18:1)(1-オレオイル-sn-グリセロ-2、3-環状ホスファート)、LPA(14:0)(1-ミリスチル-2-ヒドロキシ-sn-グリセロ-3-ホスファート)、LPA(16:0)(1-パルミチル-2-ヒドロキシ-sn-グリセロ-3-ホスファート)、LPA (18:1)(1-オレオイル-2-ヒドロキシ-sn-グリセロ-3-ホスファート)、ファルネシルモノホスファート (FMP)、アルキルグリセロホスファート (AGP、アルキルLPAとしても公知)、環状ホスファチジン酸 (CPA); カルバ−CPA(CCPA)、2-カルバ−CPA(2CCPA)、3-カルバ−CPA(3CCPA) 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11に記載の方法。
- 前記GPR92受容体が、配列番号4のアミノ酸配列を含むネコGPR92受容体および配列番号5のアミノ酸配列を含むイヌGPR92受容体からなる群より選択される、請求項11に記載の方法。
- 前記GPR92受容体が、細胞により発現され、かつ前記試験薬が該細胞と接触される、請求項1から13のいずれかに記載の方法。
- 前記細胞がカルシウム結合発光タンパク質を発現する、請求項14に記載の方法。
- 前記カルシウム結合発光タンパク質が、クリチン、エクオリン、オベリン、それらのあらゆる組み換え体もしくは単離体、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15に記載の方法。
- 細胞内カルシウム量が発光検出または蛍光検出により観察される、請求項14に記載の方法。
- 前記蛍光検出が、Fura-2 AM、Fura-2ペンタカリウム、Fura Red AM、Indo-1 AM、Indo-1ペンタカリウム、Fluo-3、Fluo-4、Fluo-8、Calcium Green-1、Calcium 3、Calcium 4、Calcium 5、Rhod-2、それらの誘導体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17に記載の方法。
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