JP7445644B2 - 化合物の結晶形及び医学におけるその使用 - Google Patents
化合物の結晶形及び医学におけるその使用 Download PDFInfo
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- JP7445644B2 JP7445644B2 JP2021509987A JP2021509987A JP7445644B2 JP 7445644 B2 JP7445644 B2 JP 7445644B2 JP 2021509987 A JP2021509987 A JP 2021509987A JP 2021509987 A JP2021509987 A JP 2021509987A JP 7445644 B2 JP7445644 B2 JP 7445644B2
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Classifications
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- C—CHEMISTRY; METALLURGY
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- C07K7/645—Cyclosporins; Related peptides
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- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/4164—1,3-Diazoles
- A61K31/4178—1,3-Diazoles not condensed 1,3-diazoles and containing further heterocyclic rings, e.g. pilocarpine, nitrofurantoin
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- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/439—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
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- A61K31/7052—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides
- A61K31/7056—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing five-membered rings with nitrogen as a ring hetero atom
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- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
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Description
「含む(comprise)」という用語はオープンな表現であり、本明細書に開示される内容を含むことを意味するが、他の内容を排除しない。
本発明の実施形態を詳細に記載すると共に、実施形態の一例を図面に示す。図面を参照して以下に記載する実施形態は例示的なものであり、本発明を解釈するために使用されることが意図されており、本発明に対する限定として理解することはできない。
表1:溶媒の略称
表2:XRPD試験のパラメータ
表3:TGA及びDSC試験のパラメータ
表4:溶解度試験のためのHPLC法
不活性雰囲気中において、-35℃でリチウムジイソプロピルアミドのテトラヒドロフラン反応混合物に、[4’-ヒドロキシ-N-メエチルロイシン]4-シクロスポリンA(2.4g,2.0mmol)のテトラヒドロフラン溶液をゆっくりと投入し、反応混合物を-35℃で1時間撹拌し、その時点で、内部温度を-35℃未満に維持しながら、N,N-ジメチルシステアミンを投入した。反応物を-35℃で撹拌しながら2時間維持し、その時点で氷酢酸を添加し、反応物を室温に加温した。混合物を第三級ブチルメチルエーテルで希釈し、飽和重炭酸ナトリウム溶液で洗浄し、硫酸ナトリウムで乾燥させた。溶媒を真空下で留去し、残渣を、酢酸エチル/ヘプタンで溶出させ、次にメタノール/酢酸エチルで溶出させるシリカゲルカラムクロマトグラフィーで精製して、式(I)の化合物(SCY-635)を560mg得た。
結晶形Aは、Empyrean粉末X線回折(XRPD)によって分析、同定した。XRPD回折スペクトログラムを図1に示した。具体的なデータは表6に示した。特徴的なピークの2θの許容誤差は、±0.2であった。
表6:結晶形AのXRPDデータ
表7:加熱された結晶形AのHPLC純度
1.溶解度試験
結晶形Aの溶解度を、RTにて6種の溶媒中で推定した。約2mgの固体を、それぞれ3mLのガラスバイアルに秤量し、このバイアルに、表8の各溶媒を100μLの増分で、固体が完全に溶解する又は総量が2mLに達するまで添加した。
表8:RTにおける結晶形Aの溶解度の推定
結晶形Aの安定性は、25℃/60%RHで少なくとも24ヶ月間の長期条件下、及び40℃/75%RHで最大6ヶ月の加速条件下で推定した。外観、結晶化度、関連物質、含水量、アッセイなどの試験パラメータのいずれにも、大きな変化は見られなかった。
表9:高温下(60℃)
前記表9の分析から、SCY-635遊離塩基のアモルファス形態の純度は、高温試験における60℃の条件下で低下し続けたが、SCY-635遊離塩基の結晶形Aの純度は変化しなかったことが分かり、このことは、アモルファス形態の安定性が、結晶形態Aの安定性よりも劣っていることを示す。
表10:高光分解下(4500Lux)
前記表10の分析から、SCY-635遊離塩基のアモルファス形態の純度は、高光分解試験における4500Luxの条件下で低下し続けたが、SCY-635遊離塩基の結晶形Aの純度は変化しなかったことが分かり、このことは、アモルファス形態の安定性が、結晶形Aの安定性よりも劣っていることを示す。
(1)ビーグル犬における結晶形Aの薬物動態試験
ビーグル犬(体重:10~12kg、雄、年齢:10~12月齢、各経口群及び静脈内群に3頭ずつ)における化合物の薬物動態試験を以下に示す。
ビーグル犬に、試験化合物を、経口胃管栄養法により2.5mg/kg又は5mg/kgの用量で、又は静脈内注射により1mg/kg又は2mg/kgの用量で投与した。
マウス(体重:20~25g、雄、年齢:45~60日齢、各経口群及び静脈内群に3頭ずつ)における化合物の薬物動態試験を以下に示した。
ICRマウスに、試験化合物を、経口胃管栄養法により10mg/kgの用量で、又は尾部静脈内注射により2mg/kg又は10mg/kgの用量で投与した。眼窩静脈の血液サンプルを、投与後0.083、0.25、0.5、1、2、4、6、8、及び24時間で採取し、EDTA-K2を含む抗凝固管に回収した。試験化合物を、液-液抽出によって血漿サンプルから抽出した。次に、多重反応モニタリング(MRM)を使用して、トリプル四重極タンデム質量分析計で定量分析を行った。薬物動態パラメータは、WinNonLin6.1ソフトウェアによる非コンパートメント法を用いて計算した。
SDラット(体重:200~250g、雄、年齢:2~3月齢、各経口群及び静脈内群に3頭ずつ)における化合物の薬物動態試験を以下に示した。
ラットに、試験結晶Aを、経口胃管栄養法により2.5mg/kg又は5mg/kgの用量で、又は静脈内注射により1mg/kgの用量で投与した。
レプリコンアッセイにおけるSCY-635の抗HCV活性
この研究の目的は、十分に特徴付けられた遺伝子型-1レプリコンにおけるSCY-635(遊離塩基結晶形A)の潜在的な抗HCV活性を評価することとした。細胞培養(Huh7肝細胞癌細胞系統)における再現可能なHCV複製系は、1999年に初めて報告された(Lohmannら、1999)。このアッセイは、非構造タンパク質をコードし、自律複製に必要なシスRNAエレメントを有するバイシストロン性サブゲノムウイルスRNA又はレプリコンを利用する。レプリコンは、HCVの複製、転写、翻訳に必要な全てのヌクレオチド配列を含む自己複製RNA分子であるが、感染性ではない。
SCY-635(遊離塩基結晶形A)は、安定したルシフェラーゼ(LUC)レポーターを含むHCV RNAレプリコンであるヒト肝細胞癌細胞系統ET(lub ubi neo/ET)で試験した。HCV RNAレプリコンETは、ホタルルシフェラーゼ(LUC)、ユビキチン、及びネオマイシンホスホトランスフェラーゼ(NeoR)融合タンパク質の生成を引き起こすHCVの5’末端を(HCV内部リボソーム侵入部位(IRES)及びHCVコアタンパク質の最初の数アミノ酸を含む)を含む。ユビキチンの切断により、LUC及びNeoRタンパク質が放出される。EMCV IRESエレメントは、HCV構造タンパク質NS3-NS5の翻訳を制御する。NS3タンパク質は、HCVポリタンパク質を切断して、HCV複製に必要な成熟したNS3、NS4A、NS4B、NS5A、及びNS5Bタンパク質を放出する。レプリコンの3’末端は、HCVの本来の3’NTRを含む。LUCレポーターの活性は、HCV複製レベルに正比例し、陽性対照の抗ウイルス化合物は、LUCエンドポイントを使用して再現性のある抗ウイルス応答を生じる。
レプリコンアッセイで試験した場合、SCY-635遊離塩基結晶形Aは、細胞毒性を伴わずに強力な抗HCV活性を示す。これは、con1b由来のバイシストロン性及び全長レプリコンに対して、それぞれ100nM(132ng/mL)及び170nM(225ng/mL)のEC50値を示す。バイシストロン性レプリコン及び全長レプリコンにおけるSCY-635遊離塩基結晶形Aの対応するEC90値は、それぞれ350nM(463ng/mL)及び690nM(912ng/mL)である。H77レプリコン(遺伝子型1a)で試験した場合、SCY-635遊離塩基結晶形Aは、それぞれ150nM(198ng/mL)及び1380nM(1,824ng/mL)のEC50及びEC90の各値を示す。
Claims (11)
- 式(I):
前記結晶Aが、2θ(°)で表される以下の特性粉末X線回折ピーク:8.66±0.2°、9.64±0.2°、10.36±0.2°、11.20±0.2°、及び18.39±0.2°を示すことを特徴とする結晶A。 - 前記結晶Aが、2θ(°)で表される以下の特性粉末X線回折ピーク:6.08±0.2°、8.66±0.2°、9.64±0.2°、10.36±0.2°、11.20±0.2°、13.00±0.2°、14.14±0.2°、14.90±0.2°、18.39±0.2°、20.40±0.2°、及び22.04±0.2°を示す、請求項1に記載の結晶A。
- 前記結晶Aが、2θ(°)で表される以下の特性粉末X線回折ピーク:6.08±0.2°、8.66±0.2°、9.64±0.2°、10.36±0.2°、11.20±0.2°、12.58±0.2°、13.00±0.2°、13.58±0.2°、14.14±0.2°、14.90±0.2°、15.36±0.2°、15.98±0.2°、16.71±0.2°、17.69±0.2°、18.39±0.2°、18.78±0.2°、19.38±0.2°、20.40±0.2°、21.71±0.2°、22.04±0.2°、22.49±0.2°、23.20±0.2°、23.88±0.2°、24.99±0.2°、25.82±0.2°、26.77±0.2°、27.61±0.2°、28.43±0.2°、29.62±0.2°、及び31.36±0.2°を示す、請求項1に記載の結晶A。
- 前記結晶Aが、143.8℃±3℃及び172.6℃±3℃に吸熱ピークを有する示差走査熱量測定サーモグラムを有する、請求項1に記載の結晶A。
- 請求項1から4のいずれかに記載の結晶Aを含む医薬組成物であって、前記医薬組成物が、更に、薬学的に許容される賦形剤又は賦形剤の組合せを含むことを特徴とする医薬組成物。
- 更に、前記結晶A以外の抗HCV薬を含む、請求項5に記載の医薬組成物。
- 前記結晶A以外の抗HCV薬が、レジパスビル/ソホスブビル、ソホスブビル、リバビリン、ペグインターフェロンアルファ-2a、又はダクラタスビルである、請求項6に記載の医薬組成物。
- 患者におけるウイルス感染症によって引き起こされる障害又は疾患を予防、治療、又は軽減するための医薬の製造における、請求項1から4のいずれかに記載の結晶A又は請求項5から7のいずれかに記載の医薬組成物の使用。
- 前記ウイルス感染症が、C型肝炎感染症である、請求項8に記載の使用。
- 患者におけるウイルス感染症によって引き起こされる障害又は疾患の予防、治療、又は軽減における使用のための、請求項1から4のいずれかに記載の結晶A又は請求項5から7のいずれかに記載の医薬組成物。
- 前記ウイルス感染症が、C型肝炎感染症である、請求項10に記載の結晶A又は医薬組成物。
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JP2008514732A (ja) | 2004-10-01 | 2008-05-08 | スシネキス インク | C型肝炎感染の治療及び予防のための3−エーテル及び3−チオエーテル置換シクロスポリン誘導体 |
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US11993664B2 (en) | 2024-05-28 |
WO2020037530A1 (en) | 2020-02-27 |
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