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薬物の負荷が表面活性物質を含む無形固体分散の溶解行動と安定性に与える影響
Dijia Liu1, Shu Li1, David S Jones1
1Pharmaceutical Engineering Group, School of Pharmacy, Queen's University of Belfast, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom.
International journal of pharmaceutics
|February 13, 2026
まとめ
薬物の負荷は,無形固体の分散安定性と溶解に影響します. テルナー系は,より高い薬物負荷のバイナリー系よりも安定性が低下し,溶解の減少が速い.
科学分野:
- 医薬品技術 医薬品技術について
- マテリアルサイエンス 材料科学
背景:
- アモルフな固体分散 (ASD) は,ルメファントリン (LUM) などの溶解性が低い薬物の溶解性を高めます.
- Soluplus®とKolliphor® RH40は,ASDにおける溶解性の向上と過飽和の維持のために使用されます.
研究 の 目的:
- 薬物の負荷 (DL) が,ルメファントリンの二次 (BASDs) と三次 (TASDs) の無形固体分散の物理的安定性,溶解,および微生物化に及ぼす影響を調査する.
- 異なる薬量でのルメファントリンのASDにおけるSoluplus®とKolliphor® RH40の役割を評価する.
主な方法:
- ホットメルトエクストルーション (HME) で,薬物負荷が10~50%のBASDとTASDを製造する.
- 粉末X線 difraktion (P-XRD) とディファレンシャルスキャニングカロメトリー (DSC) で物理的な安定性を評価する.
- 性能と微生物化の行動分析のための溶解試験とダイナミック光散射 (DLS).
主要な成果:
- ターナー型ASD (TASD) は,バイナリ型ASD (BASD) よりもガラス化移行温度 (Tg) が低く,物理的安定性が低下し,特に薬物負荷 (DL) が高くなった.
- 溶解性能は,BASDとTASDの両方のDLの増加とともに一般的に低下しました. TASDは,低いDL (≤20%) でより良いパフォーマンスを示したが,高いDL (≥30%) で著しく減少した.
- ASDにおけるより高いDLは,溶解中により大きく,より均一でないミセルにつながり,薬剤の放出量が減少したとの相関関係があります. Kolliphor® RH40の添加は,Soluplus®の微小化に干渉する可能性があります.
結論:
- 薬物負荷は,ルメファントリンのASDの物理的安定性と解消に大きな影響を与えます.
- Kolliphor® RH40 を含有する三次体系は,薬物の負荷の増加に対してより敏感であり,性能の低下につながる.
- 重要な薬物負荷の値が存在し,特に高用量薬の場合は,表面活性物質を含むASDの慎重な配方設計を必要とします.
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