JP2019048867A - 精製カルジオジェニン異性体及び関連法 - Google Patents
精製カルジオジェニン異性体及び関連法 Download PDFInfo
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- JP2019048867A JP2019048867A JP2018219030A JP2018219030A JP2019048867A JP 2019048867 A JP2019048867 A JP 2019048867A JP 2018219030 A JP2018219030 A JP 2018219030A JP 2018219030 A JP2018219030 A JP 2018219030A JP 2019048867 A JP2019048867 A JP 2019048867A
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Abstract
Description
本出願は、その内容が参照により本明細書に組み込まれる、2010年12月23日に出願された、米国特許仮出願第61/426,929号への優先権を主張するものである。
に関して説明され得る。
に関して説明され得る。
実質的な純度を有する単離されたカルジオジェニン主異性体を得るために、今まで認められなかったカルジオジェニン副異性体を含む不純物を除去するよう、方法が開発された。Chengら(2009)によって教示された抽出手順は、水に対するクロロホルム、酢酸エチル及び最終的にn−ブタノール相分離抽出を利用する。n−ブタノール相が、更なる精製のために保持され、他の有機相は廃棄された。カルジオジェニンのかなりの損失が酢酸エチル抽出で見られたので、本発明者は、毒性リスクを考えて、工業的製造スケールではクロロホルムは使用され得ないことを決定した。
対応する無糖体が、糖部分を分子の多環のコアに連結させるエステル結合の加水分解によって、多環式配糖体である単離されたカルジオジェニン主異性体から変換され得る。このような加水分解は、2つのアプローチのいずれかによって達成され得る:
(a)酸触媒された加水分解であり、これはエステルを効果的に開裂するための鉱酸の希水溶液の使用を含む。得られる生成物は、糖と、カルジオジェニンの遊離カルボン酸形態である。
(b)塩基触媒された加水分解(鹸化)であり、この中で、水酸化ナトリウム又は水酸化カリウムなどの塩基が、エステルを加水分解するために使用される。典型的には、このような加水分解は、水性媒質中で実行されるか、又は水と適切なアルコールとの混合物である溶媒系が使用される。塩基触媒された加水分解から得られる生成物は、カルジオジェニンのカルボン酸基の塩の形態である。この塩は、鉱酸を使用して、遊離酸に容易に変換され得る。
カルジオジェニン主異性体及び対応する無糖体は、インビトロ及びインビボの双方で、心原性分化を誘導又は増強するために使用され得る。この有用性は、カルジオジェニン主異性体又はその無糖体を含む組成物の存在下で培養されたMSCsが、心臓ミオサイトへの実質的に増強された分化を呈するという事実によって立証される。これに加えて、MSCsがカルジオジェニン主異性体又はその無糖体の存在下で心臓ミオサイトと共に共培養される場合、拍動する心臓ミオサイトがMSCsから分化する。
単離されたカルジオジェニン主異性体及び/又はその対応する無糖体は、単独で、又は同様な又は異なる生物学的活性を有する他の化合物と共に投与され得る。例えば、本発明の化合物及び医薬組成物は、併用療法で投与され得、すなわち、単一又は別個の投与形態で同時に投与されるか、又は別個の投与形態で互いに数時間又は数日以内に投与され得る。このような併用療法の例としては、脳卒中、骨格筋再生、創傷治癒、又は心臓疾患の問題を治療するために、カルジオジェニン主異性体及び/又はその対応する無糖体の化合物を、脳卒中、他の薬剤と共に投与することが挙げられる。
1.抽出
図5は、EGJからカルジオジェニン主異性体を生成するプロセスの概略概要を示す。それからEGJメタノール抽出物を調製する全植物を、中国の貴州省から収集した。この植物は、日本、韓国、及び北アメリカの地域の固有種としても知られていて、これらの地域から収集した材料は、本発明に記載の精製プロセスを介して、高純度のカルジオジェニンをもたらすことが可能なEGJの供給源として好適であるカルジオジェニンのレベルを同様に含有することが期待される。
________________________________________
良好な相分離1:あるいは、水性メタノール性懸濁液を、セライトの補助で、洗浄されたケーキで濾過することができる。次に、この水性メタノール性相を0.3〜0.6Lのジクロロメタンで3回抽出し、0.3〜0.6LのTBME部分で5回抽出する。この水性メタノール性相は、塩化ナトリウム飽和溶液に加えられ、最終的にn−ブタノールで抽出される。このプロセスは、DCM抽出中のエマルジョン形成を低減し、激しい発泡を回避しつつ、メタンールを除去しようとする場合に、水性メタノール性相を濃縮する必要性を回避する。
545gの量の乾燥HP−20樹脂(粗生成物#2当たり、およそ15質量等価物の乾燥樹脂)をメタノール中でスラリー化し、カラム(7.5cm×21cm=927mlのカラム容量)に移し、20%メタノール/水に交換した。粗生成物#2を、1〜1.5容量の20%メタノール/水に再懸濁させて、カラムにかけた。これを水中メタノールの増加する濃度(10%段階)で溶出させた。20〜30%メタノール/水の段階については、2Lの2つフラクションを採取し、40〜70%メタノール/水の段階については、1Lの4つのフラクションを採取した。
プール−2固体(5.4g)を、30mlの出発溶離液DCM/メタノール90:10中でスラリー化し、供給物を調製した。DCM/メタノール90:10(v:v)で平衡化した100gのシリカゲル(およそ20質量等価物)上で、分離を実施した。150mlの前溶出液を溶出させた後に、フラクションを50mlのアリコートで、フラクション32まで採取し、次いで溶離液をDC/メタノール85:15に変更して、100mlサイズのフラクションを採取した。フラクション42で、溶離液をDCM/メタノール80:20に変更した。
カルジオジェニンの全体の純度を増加させるために、以下のパラメータを使用して、逆相分離を実施した。
1.29gの混合物中の2つの異性体を分離するために、以下のパラメータを使用して、キラル相分離を実施した。
互いから分離された2つのカルジオジェニン異性体が安定でありかつ互いに変換することがないかどうかを決定するために、負荷試験を実施した。具体的には、2つのカルジオジェニン異性体は、MTBE/IPA=50:50中に、又は40℃で固体として24時間保存されることで(主異性体が溶液中又は固体として、副異性体が溶液中のみで保存)、ストレス負荷された。
単離したカルジオジェニン主異性体を、図19に示すように、過剰のNaOHを使用して、MeOH:H2O 1:1中で鹸化を受けさせた。単離したカルジオジェニン主異性体の得られた無糖体は、HPLCによる少なくとも92%の純度を有する。
MSCsの心原性分化を誘導することの活性に関して試験されたものは、5つの化合物であり、これは単離したカルジオジェニン主異性体(HUYA−1)、単離したカルジオジェニン副異性体(HUYA−2)、カルジオジェニン副異性体の無糖体(HUYA−3)、カルジオジェニン主異性体の無糖体(HUYA−4)、及びChengら、2009の方法に従って調製されたカルジオジェニン組成物(Car)であった。図9〜13のそれぞれで、C18逆相クロマトグラフィープロファイルが、これら化合物に関して示されている。
Claims (16)
- 式
を有する単離した化合物であり、210nmで少なくとも98%(a/a)HPLC純度を有する化合物。 - 前記化合物が、210nmで少なくとも98.97%(a/a)HPLC純度を有する、請求項1に記載の化合物。
- 請求項1に記載の前記化合物と薬学的に許容可能な担体とを含む医薬組成物。
- ダイコンソウ(Geum japonicum)から請求項1に記載の前記化合物を抽出する改善された方法であり、(A)ダイコンソウ(Geum japonicum)のメタノール性/水溶液を沈殿させかつ濾過して不必要な固体を除去することと、(B)ジクロロメタン及びTBMEで、前記メタノール/水溶液を相分離抽出することと、(C)n−ブタノールで抽出することと、の工程を含む方法。
- 請求項1に記載の化合物組成物を、物質充填に対する樹脂の最適質量比(15:1)及びメタノール/水の段階濃度を使用する、低圧Diaion HP−20吸着クロマトグラフィーにかけること、続いて物質充填に対する樹脂の最適質量比(20:1)及びジクロロメタン/メタノールの段階濃度を使用する低圧シリカゲルクロマトグラフィーにかけることを更に含む、請求項4に記載の方法。
- 請求項1に記載の化合物組成物を、濃度勾配プログラムで水性緩衝液及びメタノール移動相を使用する、高圧逆相クロマトグラフィーにかけることを更に含む、請求項5に記載の方法。
- 前記高圧逆相クロマトグラフィーが、Luna(登録商標)C18(2)カラムを使用することを含む、請求項6に記載の方法。
- 請求項1に記載の化合物を単離する方法であって、(A)ダイコンソウ(Geum japonicum)のメタノール抽出物から抽出物を得ることと、(B)前記抽出物をキラル相クロマトグラフィー又は超臨界液体クロマトグラフィーにかけること、の工程を含み、これによって前記化合物が獲得される、方法。
- 前記キラル層クロマトグラフィーが、Chiralak ICカラムを使用することを含む、請求項8に記載の方法。
- (C)前記化合物を結晶化することを更に含む、請求項8に記載の方法。
- 請求項1に記載の化合物を加水分解することによって得られる単離した無糖体。
- 式
を有する単離した無糖体であり、少なくとも92%の純度を有する無糖体。 - 請求項12に記載の前記無糖体と薬学的に許容可能な担体とを有する医薬組成物。
- 請求項3に記載の前記医薬組成物を、これを必要とする患者に投与することを含む、心筋を再生するための方法。
- 請求項13に記載の前記医薬組成物を、これを必要とする患者に投与することを含む、心筋を再生するための方法。
- 間葉幹細胞を請求項1又は12に記載の化合物を含む組成物に接触させることを含む、心原性分化を誘導又は増強するための方法。
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| AU2011349207A1 (en) | 2013-07-11 |
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