JP2017500361A - 食道の炎症状態を治療するための最適化された医薬製剤 - Google Patents
食道の炎症状態を治療するための最適化された医薬製剤 Download PDFInfo
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Abstract
Description
驚くべきことに、表1に示す成分および組成で調製した本発明のブデソニド発泡錠が、最大36ヶ月間にわたって物理化学的に安定であり、本発明の発泡錠の使用に関連する品質パラメータ、例えば大きさ、形状、機械的安定性などを達成できることが分かった。
様々な保存条件下でブデソニド1mg含有発泡錠の耐久性試験を行った結果を表2にまとめる。初期値と比較したところ、負荷試験条件下で保存後も耐久性に関して何ら変化は見られなかった。
初期値と比較したところ、とりわけ気候区域IIの条件下での保存後において、耐久性に関して何ら変化は見られなかった。これとは対照的に、本発明の配合からわずかに逸脱した場合(例えばスクラロース0.40mgをアスパルテーム1.0mgに変更した場合)、ブデソニド1mg含有発泡錠は長期安定性を示さないことが表3の結果から分かった。長期安定性が示されなかった前記試験の結果から、興味深いことに、配合を変更したことによって、同期間にわたって長期保存した後のブデソニドの分解量が約7倍増加することが明らかになった。この分解は、1mg未満の用量のブデソニドを用いた場合にさらに顕著であるため、表1に示した成分および組成で調製することによって本発明の発泡錠の物理化学的安定性を達成することが好ましい。口腔内分散性発泡錠1錠当たりのブデソニド含有量が1mg未満である場合、口腔内分散性発泡錠はさらに顕著に不安定なものとなる。
臨床データ
多施設共同4群第II相無作為化プラセボ対照二重盲検試験での活動性好酸球性食道炎の治療において、ブデソニド発泡錠による1mg/日の2回投与または2mg/日の2回投与と、ブデソニド粘性経口懸濁液による2mg/日の2回投与またはプラセボとを比較した。盲検を維持するため「ダブルダミー」法を用いた。この試験は、プラセボよりも本発明のブデソニド製剤が優れていることを示すことを目的として行われた。この試験における複数のプライマリーエンドポイントのうち、第1のプライマリーエンドポイントは組織学的寛解率とし、治療2週間後に、寛解状態にある患者の平均好酸球数(eos)が16個/mm2 hpf(「高倍率視野」すなわち400倍の顕微鏡視野)を下回ることとした。第2のプライマリーエンドポイントとして、本試験の開始時と治療終了時における1mm2 hpf当たりの平均好酸球数の差を測定した。これら2つの効果パラメータは閉検定法により確認試験を行い、3つの有効成分投与群(verum群)とプラセボ群とを比較した。前記エンドポイントの設定を含む本試験のデザインは、前掲のStraumann, 2010による試験と実質的に同一である。
前記した組織学上の効果に加えて、本発明の製剤を用いた2週間の治療によって、統計学的有意かつ臨床的有意義に好酸球性食道炎の改善がもたらされることが内視鏡画像から分かった。この結果を図2に示す。
1錠当たり2mgのブデソニドを含有する本発明の口腔内分散性発泡錠を20〜50歳の患者群に投与した。これらの患者は、2mgのブデソニドを含有する錠剤を1日1錠投与する試験群において処置した。対照群には、有効成分を含まない口腔内分散性発泡錠(プラセボ)を投与した。15日間の治療を通して、本発明の口腔内分散性ブデソニド含有発泡錠が良好な忍容性を示すこと、プラセボ群と比較して本発明の発泡錠を投与した群の組織学的パラメータおよび臨床的パラメータが有意に改善したことが分かった。本発明の口腔内分散性発泡錠は、適用性の点ですべての被験者において良好であると評価された。
さらなる試験において、好酸球性食道炎(EoE)の投薬治療に対する応答を監視および確認するための血清/バイオマーカーの同定を行った。この臨床試験では、局所ステロイド治療(前記参考文献の口腔内分散性発泡錠による治療)を受けたEoE患者が含まれていた。本発明の発泡錠の適合性を検討するため、様々な血清マーカーを試験することによって、これらの血清マーカーの変化と、治療に対する応答および治療の成果とがどの程度相関するのかを調べた。血清試料の材料は、本明細書に記載の臨床試験(実施例4)から得た。
長時間持続する臨床効果の詳細
長時間持続する臨床効果は、さらに試験を行って、治療を行わない追跡期間における嚥下障害スコアを決定することによって示すことができる。「患者報告アウトカム」と呼ばれるこのような手段では、嚥下障害事象の頻度をゼロ(事象なし)〜4(1日当たり数回の事象)で示し、嚥下障害事象の程度をゼロ(嚥下に問題なし)〜5(内視鏡的介入を必要とする長時間継続する完全閉塞)で示す。このスコアを得るためのBUU−2試験の結果では、投与群(1mgまたは2mgのブデソニドを投与した群)において、変化の平均値(%)として測定した治療効果が最終治療時から追跡期間終了時まで継続することが分かる。これら2つの投与群において、変化の平均値はマイナスを示し、すなわち、前記スコアは高い値から低い値へと改善された。プラセボ群においては、前記スコアは25.5%増加し、著しく悪化した。これらの試験結果を図4にまとめる。
Claims (15)
- 0.25〜5mgのブデソニド、水性環境において別の酸と共にガスを放出することができる少なくとも1つの薬理学的に許容可能な酸の塩、および水溶液中のpH値を低下させる弱酸の塩または弱酸を含有し、質量が100〜200mgである口腔内分散性発泡錠。
- 直径が5〜10mmであることを特徴とする、請求項1に記載の口腔内分散性発泡錠。
- 高さが1.5〜3.0mmであることを特徴とする、請求項1または2に記載の口腔内分散性発泡錠。
- 破壊強度が10〜100Nであることを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 摩損度が最大で5%であることを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 前記した、水性環境において別の酸と共にガスを放出することができる薬学的に許容可能な酸の塩が、NaHCO3、Na2CO3、KHCO3、K2CO2、CaCO3、またはこれらの混合物であることを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 前記した、水溶液中のpH値を低下させる薬学的に許容可能な弱酸の塩が、クエン酸二ナトリウム、クエン酸一ナトリウム、またはこれらの混合物であることを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が0.5〜10重量%のポビドンK25を含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が0.1〜1.0重量%のスクラロースを含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が0.01〜0.2重量%のドクサートナトリウムを含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が2.0〜10.0重量%のマンニトールを含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が1.0〜10.0重量%のマクロゴール6000を含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 最終製品である錠剤が0.05〜0.5重量%のステアリン酸マグネシウムを含むことを特徴とする、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 食道の炎症状態の治療に使用するための、先行する請求項のいずれか1項に記載の口腔内分散性発泡錠。
- 前記食道の炎症状態が好酸球性食道炎であることを特徴とする、請求項14に記載の食道の炎症状態の治療に使用するための口腔内分散性発泡錠。
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