JP2023523097A - 性腺刺激ホルモン放出ホルモン受容体アンタゴニスト及びその使用 - Google Patents
性腺刺激ホルモン放出ホルモン受容体アンタゴニスト及びその使用 Download PDFInfo
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Abstract
Description
of Drug design and Discovery)』(テーラーフランシス(Taylor & Francis)、2002年4月)に開示されている関連の内容を参照すればよい。
実施例における化合物G201の具体的調製経路は次の通りであった。
カルシウムフロー検出:
FLIPRカルシウムフロー検出試薬キット(Calcium 4 assay kit)を使用して、組換えヒト性腺刺激ホルモン放出ホルモン受容体(GnRHR)安定細胞株CHO-K1/GNRHR/Gα15の細胞内におけるカルシウムの変化を測定した。GnRHRは、Gタンパク質共役受容体(GPCRs)の一種であり、GPCRsシグナルはGq経路を通じて細胞内のカルシウムを放出させる。そのため、カルシウムイオン感受性蛍光プローブを使用して細胞内のカルシウム放出を検出することで、Gq経路を通じてシグナル伝達を行ったGnRHRの機能変化を検出可能である。実験の手順は次の通りとした。
ラットにおける薬物動態試験:
メスのSDラット12匹を3匹/群で4群に分け、それぞれ、G201及びエラゴリクスナトリウム(Elagolix Sodium)を静脈注射及び胃内投与した(G201は、5%N,N-ジメチルアセトアミド及び5%ポリオキシエチレンヒマシ油ELを含む生理食塩水に溶解し、エラゴリクスナトリウムは生理食塩水にそのまま溶解した)。投与量は、それぞれ25mg/kg及び50mg/kgであった。投与前は一晩絶食とし、投与から4h後に給餌を再開した。なお、試験期間全体を通じて飲水は自由とした。投与前及び投与から5min、15min、30min、1h、2h、4h、6h、8h、24h後に、眼窩後静脈叢から採血した。採血量は約0.2mLとした。全血液サンプルは、1h以内に4000rpmで10min遠心分離にかけて、上層の血漿を分離した。且つ、1h以内に冷蔵庫に置き、分析するまで-20℃で保存した。血漿サンプルは、1:8でメタノールタンパク質沈殿したあと、LC-MS/MS法でG201及びエラゴリクスの血中薬物濃度を検出し、DAS3.2.7ソフトで主要な薬物動態パラメータを算出した。
マウスにおける薬物動態試験:
メスのICRマウス10匹を各群5匹として2群に分け、それぞれ、G201を静脈注射及び強制経口投与した。投与量は10mg/kgであった。そして、投与から、0.083h、0.25h、0.5h、1h、2h、4h、6h、8h後に眼窩後静脈叢から採血した。採血量は約0.1mLとした。血液サンプルは、1h以内に4000rpmで10min遠心分離にかけて、上層の血漿を分離した。且つ、1h以内に冷蔵庫に置いて-80℃で保存し、測定まで待機した。採血前は、被検動物を少なくとも12h絶食させたが、絶水にはしなかった。また、採血過程では絶食・絶水とし、投与から2h後に自由に摂食・摂水させた。LC-MS/MS法でICRマウス体内におけるG201の血中薬物濃度を検出し、DAS3.2.7薬物動態ソフトを用いて、AUC0-t、AUC0-∞、Cmax、t1/2等を含む主要な薬物動態パラメータを算出した。
血漿タンパク結合試験:
予め培養済みのSDラット(雌雄各5匹)又は健康なヒトの血漿を採取し、異なる濃度の被験物質(G201(1μM、10μM、100μM)及びエラゴリクス(10μM))及び対照品(ワルファリンナトリウム(10μM))を含む作業溶液とそれぞれ十分に混合したあと、薬物を含有する血漿サンプル50μLを等体積のブランク緩衝液に加えて未濾過サンプルとした。一方、350μLを限外濾過装置(限外濾過管の内部管)に移し、37℃で遠心分離にかけた(10000g×3分)。そして、遠心分離の終了後、取り出した外部管のサンプル(濾液サンプル)に50μLのブランク血漿を加えた。また、同様に、取り出した内部管のサンプル(濾過余剰サンプル)に等体積のブランク緩衝液を加えた。そして、混合から2分後に、内部標準液を加えた。全てのサンプルは10分間回転させて沈殿タンパク質を遠心分離し、上清液を取得した。そして、LC-MS/MS法で被験物質及び対照品の濃度を測定し、遊離パーセント(遊離パーセント=(濾液サンプルの薬物濃度/未濾過血漿の薬物濃度)×100%)と、結合パーセント(結合パーセント=100%-遊離パーセント)を算出した。また、回収率(%)=(濾液サンプルの薬物濃度×体積+濾過余剰サンプルの薬物濃度×体積)/未濾過血漿の薬物濃度×総体積×100とした。
去勢オスカニクイザルにおける薬効試験:
3頭の3~5歳齢(体重3.8~4.0kg)のオスのカニクイザル(広西桂東霊長類開発実験有限公司より購入)を取得し、一晩絶食させ、麻酔をかけて両側睾丸の切除術を行った。その後、放射免疫測定法により、去勢から3~7週間のカニクイザルの血清黄体形成ホルモン(LH)を測定した結果、オスのカニクイザルは、去勢から3週間後の血清LHが明らかに上昇し(約10倍)、去勢から7週間後にLHレベルがほぼ安定した。
Claims (10)
- 前記異性体は、エナンチオマー、ジアステレオマー、シス-トランス異性体又は立体異性体から選択されることを特徴とする請求項1に記載の化合物。
- 前記加水分解反応は、通常、塩基が存在する条件で実施可能であることを特徴とする請求項3に記載の調製方法。
- 請求項1~2のいずれか1項に記載の化合物又はその薬学的に許容可能な塩、異性体、プロドラッグ、結晶多形又は溶媒和物の、薬物の製造における使用。
- 前記薬物は、性腺刺激ホルモン放出ホルモン受容体アンタゴニストから選択されることを特徴とする請求項5に記載の使用。
- 前記薬物は、性腺ホルモンに関連する疾患を治療するための薬物から選択されることを特徴とする請求項5に記載の使用。
- 前記性腺ホルモンに関連する疾患は、子宮内膜症、閉経、月経不順、子宮筋腫、子宮線維腫、多嚢胞性卵巣症候群、子宮内膜症、子宮平滑筋腫、エリテマトーデス、多毛症、早発思春期、小人症、ざ瘡、脱毛、性腺ホルモン依存性腫瘍、性腺刺激ホルモンを産生する下垂体腺腫、睡眠時無呼吸症候群、過敏性腸症候群、月経前症候群、前立腺肥大症、避妊及び不育症、アルツハイマー病から選択されることを特徴とする請求項7に記載の使用。
- 前記性腺ホルモン依存性腫瘍は、前立腺癌、子宮癌、乳癌、卵巣癌、下垂体性腺刺激細胞腺腫から選択されることを特徴とする請求項8に記載の使用。
- 請求項1~2のいずれか1項に記載の化合物又はその薬学的に許容可能な塩、異性体、プロドラッグ、結晶多形又は溶媒和物を含む薬物組成物。
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PCT/CN2021/094748 WO2021213538A1 (zh) | 2020-04-20 | 2021-05-20 | 促性激素释放激素受体拮抗剂及其用途 |
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