JP2012515796A - ラセミのアミノプテリンを含む医薬組成物 - Google Patents
ラセミのアミノプテリンを含む医薬組成物 Download PDFInfo
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- JP2012515796A JP2012515796A JP2011548163A JP2011548163A JP2012515796A JP 2012515796 A JP2012515796 A JP 2012515796A JP 2011548163 A JP2011548163 A JP 2011548163A JP 2011548163 A JP2011548163 A JP 2011548163A JP 2012515796 A JP2012515796 A JP 2012515796A
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- Prior art keywords
- aminopterin
- racemic
- pharmaceutical composition
- pharmaceutically acceptable
- acceptable salt
- Prior art date
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Abstract
Description
本発明は、ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩を含む医薬組成物を提供する。本発明は、さらに、患者において障害を処置する方法であって、治療有効量のラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩を投与することを含む方法を提供する。より具体的には、本発明は、少なくともジヒドロ葉酸還元酵素活性によって調節される障害、例えば癌および炎症性障害を処置する方法であって、処置を必要とする患者に、治療有効量のラセミのアミノプテリンまたはその薬学的に許容される塩を投与することを含む方法を提供する。
エナンチオマーは、ヒトの左手と右手が鏡像であるが重ね合わせられないのと同様に、互いに重ね合わせられない鏡像である2つの立体異性体の1つである。エナンチオマーは、本質的に同一の物理学的性質(平面偏光を同量であるが反対方向に回転させる能力がある以外)、および、化学的性質(キラル環境以外)を有する。等量の光学活性な異性体とそのエナンチオマーの混合物はラセミ体であり、その正味の平面偏光の回転はゼロである。
本発明は、ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩を含む医薬組成物を提供する。好ましくは、ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩は、D−アミノプテリンおよびL−アミノプテリンを含み、ラセミのアミノプテリン中に15%〜85%のD−アミノプテリンが存在する。より好ましくは、ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩中に25%〜75%のD−アミノプテリンが存在する。より好ましくは、ラセミのアミノプテリン中に35%〜65%のD−アミノプテリンが存在する。最も好ましくは、ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩中に45%〜55%のD−アミノプテリンが存在する。好ましくは、本医薬組成物は、経口投与に適合している。より好ましくは、本医薬組成物は、錠剤またはカプセル剤の投与形であり、さらに、薬学的賦形剤を含む。好ましくは、ラセミのアミノプテリンの薬学的に許容される塩は、二ナトリウム塩である。好ましくは、医薬組成物中のラセミのアミノプテリンは、0.01mgから4mgの量で存在する。好ましくは、医薬組成物は、さらに、L−アミノプテリンを含む。
本発明は、ラセミのアミノプテリンおよびその薬学的に許容される塩を含む医薬組成物を提供する。予想外なことに、経口投与されたラセミのアミノプテリンの吸収は、L−異性体について選択的であり、実質的に循環においてD−異性体は検出不可能であることが見出された。L−異性体についての新しく見出された選択性により、D−異性体は薬理学的評価および毒物学的評価、代謝および分配の特性決定、ならびに臨床学的評価において考慮する必要がないため、ラセミ体の多くの追加的試験、開発コストおよび規制の重荷が回避される。このことは、著しい商業的利点を意味する。さらに、予想外なことに、経口投与されたラセミのアミノプテリンからのL−異性体の全身曝露は、純粋なL−異性体の経口投与に対して増大していることが見出された。
(a) 感染、刺激状態(irritation)、内部刺激因子(internal stimulus)または幾つかの他の原因により、活性が遺伝的に変化したかどうかにかかわらず、ジヒドロ葉酸還元酵素活性の不足が障害または1つ以上の生物学的徴候の原因であるもの;
(b) ジヒドロ葉酸還元酵素活性を低下させることによって、疾患もしくは障害、または、疾患または障害の観察可能な徴候(複数の場合を含む)が軽減されるもの。ジヒドロ葉酸還元酵素活性の存在は、必ずしも原因として疾患もしくは障害またはその観察可能な徴候に関連していない;あるいは
(c) ジヒドロ葉酸還元酵素活性が、疾患または障害を生じるかまたはそれに関係する生化学的または細胞のカスケードの一部を妨げるもの。この点において、ジヒドロ葉酸還元酵素活性は、当該カスケードを変化させ、従って疾患、状態または障害を制御する。
医薬組成物
0.25mg(バッチ 157I0907)および1.0mg(バッチ 387I1100およびバッチ 116I0604)の投与量の、エナンチオマーとして純粋なおよびラセミの割線の入った即時放出(IR)錠剤を表1の通りに製造した。
錠剤製剤中のL−およびD−異性体の分析
キラル移動相での定組成逆相HPLC法を用いて、純粋なL−異性体錠剤製剤(バッチ 387I1100およびバッチ 116I0604)のエナンチオマー純度を確認し、ラセミの錠剤製剤(バッチ 157I0907)中のL−およびD−異性体の相対量を測定する。本方法は、下記の工程を含む。
6a:ブランクのベースライン。5μlの希釈液サンプル(10% 水性ジメチルアセトアミド)をクロマトグラフに注入し、クロマトグラムとピーク応答を記録した。得られたピークを、ブランク注入に存在するものとして定義し、その面積を記録した。これらをその後の面積計算値全てから引いた。
錠剤製剤中の全アミノプテリン異性体の定量
逆相HPLC濃度勾配法を用いて、純粋なL−異性体錠剤製剤(バッチ 387I1100およびバッチ 116I0604)およびラセミの錠剤製剤(バッチ 157I0907)のアミノプテリン異性体の全量をアッセイした。本方法は、下記の工程を含んだ。
4a:ベースライン応答。5μl等量の溶媒Aをクロマトグラフに注入し、クロマトグラムと平均ピーク応答を記録した。得られたピークをブランク注入液中に存在しているものと定義し、この面積を記録した。これをその後の面積計算値全てから引いた。
ビーグル犬における薬物動態および吸収
純粋なL−異性体錠剤製剤(バッチ 116I0604)、99mgの微晶性セルロースと混合した1mgのD−異性体、および4錠のラセミの錠剤製剤(バッチ 157I0907)の経口吸収を調べるために、10匹(N=10)のビーグル犬について薬理試験を行った。各製剤は、硬ゼラチンカプセル剤に入れられ、直接胃に入れることによって投与された。各製剤の投与を、7日間の休薬期間によって隔てた。10匹のイヌの平均体重は11.3±1.7(SD)kgであった。
ヒトにおける薬物動態および吸収
中程度から重度の乾癬を有する21才以上の男性および女性の対象について、0.25mgのrac−アミノプテリン錠剤(D−およびL−アミノプテリン, バッチ 157I0907)の経口薬物動態および安全性を1.0mgの対照L−アミノプテリン錠剤(バッチ 387I1100)と比較するために、無作為化単一用量2期間クロスオーバー試験を行った。rac−アミノプテリン錠剤(4×0.25mg錠剤)または対照L−アミノプテリン錠剤(1×1.0mg錠剤)の何れかの1.0mg単回投与を行うために、2つの平行アームで対象を無作為化し(それぞれN=6)、各対象から10時間血液検体を得た。7日後、両方のアームの対象を試験の他のアームとクロスオーバー試験して、他の製剤の1.0mg経口単回投与を行い、再度血液検体を10時間に亘って採取した。
Claims (19)
- ラセミのアミノプテリンまたはその薬学的に許容される塩を含む医薬組成物。
- 医薬組成物が経口投与に適合させたものである、請求項1に記載された医薬組成物。
- ラセミのアミノプテリンの薬学的に許容される塩が二ナトリウム塩である、請求項1に記載された医薬組成物。
- ラセミのアミノプテリンの量が0.01mgから4mgである、請求項1に記載された医薬組成物。
- 錠剤またはカプセル剤の形態である、請求項1に記載された医薬組成物。
- 約10%から約90%(重量%)のL−アミノプテリンまたはその薬学的に許容される塩をさらに含む、請求項1に記載された医薬組成物。
- ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩がD−アミノプテリンおよびL−アミノプテリンを含み、ラセミのアミノプテリン中に15%から85%のD−アミノプテリンが存在している、請求項1に記載された医薬組成物。
- ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩中に、25%から75%のD−アミノプテリンが存在している、請求項7に記載された医薬組成物。
- ラセミのアミノプテリン中に35%から65%のD−アミノプテリンが存在している、請求項8に記載された医薬組成物。
- ラセミのアミノプテリンまたはラセミのアミノプテリンの薬学的に許容される塩中に、45%から55%のD−アミノプテリンが存在している、請求項9に記載された医薬組成物。
- 患者において障害を処置する方法であって、患者に、治療有効量のラセミのアミノプテリンまたはその薬学的に許容される塩を投与することを含む方法。
- 治療有効量のラセミのアミノプテリンが経口投与される、請求項11に記載された方法。
- 該障害が、関節リウマチ、若年性関節リウマチ、乾癬、乾癬性関節炎、関節炎、アトピー性皮膚炎、炎症性腸疾患、気管支肺異形成症およびイヌのアトピー性皮膚炎からなる群から選択される、請求項11に記載された方法。
- 併用治療において第2薬物の使用をさらに含む、請求項11に記載された方法。
- 第2薬物が葉酸である、請求項14に記載された方法。
- 治療有効量のラセミのアミノプテリンが、患者のkg体重当たり0.3mg未満のアミノプテリンである、請求項11に記載された方法。
- 少なくともジヒドロ葉酸還元酵素活性によって調節される障害を処置する方法であって、処置を必要とする患者に、治療有効量のラセミのアミノプテリンまたはその薬学的に許容される塩を投与することを含む方法。
- 治療有効量のラセミのアミノプテリンまたはその薬学的に許容される塩が経口投与される、請求項17に記載された方法。
- 該障害が、白血病、リンパ腫、乳癌、関節リウマチ、若年性関節リウマチ、乾癬、乾癬性関節炎、関節炎、アトピー性皮膚炎、炎症性腸疾患、気管支肺異形成症およびイヌのアトピー性皮膚炎からなる群から選択される、請求項17に記載された方法。
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US7612071B2 (en) * | 2004-03-12 | 2009-11-03 | Syntrix Biosystems, Inc. | Compositions and methods employing aminopterin |
US7312217B2 (en) | 2005-03-11 | 2007-12-25 | Syntrix Biosystems, Inc. | Aminopterin dosage forms and methods for inflammatory disorders |
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JP2002501512A (ja) * | 1997-05-09 | 2002-01-15 | ドイチェス クレブスフォルシュンクスツェントルム スチフトゥング デス エッフェントリヒェン レヒツ | 葉酸アンタゴニストと担体とを含有してなるコンジュゲート |
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US4746659A (en) * | 1985-12-30 | 1988-05-24 | Sri International | Diastereomers of 10-alkyl-10-deazaminopterins and process for preparing the same |
DE3821875C1 (ja) * | 1988-06-29 | 1990-02-15 | Eprova Ag, Forschungsinstitut, Schaffhausen, Ch | |
US5521190A (en) * | 1993-05-27 | 1996-05-28 | Fmc Corporation | Insecticidal pterdines and 8-deazapteridines |
US20050187147A1 (en) | 2003-09-22 | 2005-08-25 | Newman Michael J. | Compositions and methods for increasing drug efficiency |
WO2006049442A1 (en) * | 2004-11-03 | 2006-05-11 | Forhumantech. Co., Ltd. | Pharmaceutical compositions for transdermal delivery |
US7312217B2 (en) * | 2005-03-11 | 2007-12-25 | Syntrix Biosystems, Inc. | Aminopterin dosage forms and methods for inflammatory disorders |
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JPN6014009877; Journal of Medicinal Chemistry Vol.18, No.8, 1975, pp.776-780 * |
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CA2754007C (en) | 2015-11-10 |
AU2010206631A1 (en) | 2011-09-15 |
CN102361558B (zh) | 2015-09-02 |
EP2384119A4 (en) | 2012-07-04 |
KR101746757B1 (ko) | 2017-06-13 |
EP2384119A1 (en) | 2011-11-09 |
JP5707338B2 (ja) | 2015-04-30 |
US20100190798A1 (en) | 2010-07-29 |
AU2010206631B2 (en) | 2016-03-31 |
WO2010085717A1 (en) | 2010-07-29 |
IL214271A0 (en) | 2011-09-27 |
IL214271A (en) | 2016-09-29 |
US8349837B2 (en) | 2013-01-08 |
DK2384119T3 (en) | 2015-10-12 |
CN102361558A (zh) | 2012-02-22 |
KR20120049170A (ko) | 2012-05-16 |
CA2754007A1 (en) | 2010-07-29 |
EP2384119B1 (en) | 2015-08-05 |
NZ594807A (en) | 2014-01-31 |
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