グラス変換温度よりはるかに低い温度でのアモルフなテルフェナジンの核化とその物理的安定性への影響
Katsutoshi Yamaguchi1, Yuya Ishizuka2, Etsushi Yoshikawa2
1Pharmaceutical Developability, CMC Research, Astellas Pharma Inc., 21Miyukigaoka, Tsukuba, Tsukuba, Ibaraki 3058585, Japan.
Molecular pharmaceutics
|August 26, 2025
まとめ
アモルフなテルフェナジン (TFD) の調査は,−20 °Cでの熱熱が冷結晶化温度を大幅に低下させ,II形態の核形成を促進することを明らかにした. このプレアニリングステップは,より高い温度で後の結晶化を加速します.
科学分野:
- 医薬品科学
- 材料科学
- 物理化学
背景:
- 薬剤の無形固体形態は,溶解性と生物利用性において潜在的な利点を提供します.
- 無形薬の結晶化行動を制御することは,一貫した製品の性能に不可欠です.
- テルフェナジン (TFD) は抗ヒスタミン剤で,固体状態の性質は,その製法に極めて重要です.
研究 の 目的:
- アモルフなテルフェナジン (TFD) の冷結晶化行動に対する低温解熱の効果を調査する.
- TFDの特定の結晶形態の最適な核化温度を特定する.
- アモルフな医薬品における異常な核形成の仕組みを理解する.
主な方法:
- 熱的行動と結晶温度を評価するための差分スキャニングカロメトリー (DSC).
- 粉末X線微分法 (PXRD) で結晶の形を特定する.
- 結晶化運動を分析するためのアイソコンバーションキッシンジャー-アカヒラ-スノース (KAS) モデル.
- 環境条件を含む様々な温度での冷却試験
主要な成果:
- -20 °Cでの無形TFDの解熱は,最も低い冷結晶温度とより高い結晶形式IIをもたらした.
- -20 °Cでのプレアニリングは,100 °Cでの同熱結晶化の開始時間を30%短縮しました.
- KASモデルは,前形核を示唆する低温解熱後に増加した表面的周波数因子を示した.
結論:
- TFD形式IIの核化は,ガラス化温度よりはるかに低い温度で著しく強化されます.
- 低温解熱は,無形な医薬品の結晶化を制御し加速する戦略である.
- 安定した無形薬剤の配列の開発には 異常な核形成の振る舞いを理解することが重要です
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