Development of a precipitation-resistant solution formulation to increase in vivo exposure of a poorly water-soluble compound

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• 作者：Lori Burton^a ; ^{lori.burton@bms.com} ; William Ying^a ; Rajesh Gandhi^a ; Ronald West^b ; Christine Huang^c ; Simon Zhou^b ; ¹ ; Keyur Shah^a ; ² ; Jinling Chen^a ; ³ ; Xiaohang Shen^a ; ⁴
• 关键词：Poorly soluble ; Nonionizable ; Precipitation-resistant ; Nonaqueous ; Oral bioavailability
• 刊名：International Journal of Pharmaceutics
• 出版年：2012
• 期刊代码：24_03785173
• 类别：pha
• 出版时间：20 August, 2012
• 卷：433
• 期：1-2
• 页码：94-101
• 文件大小：439 K

摘要

In vitro and in vivo investigations were conducted to develop a suitable formulation for early toxicology and clinical studies of ((R)-7-(3,4-dichlorophenyl)-5-methyl-4,7-dihydropyrazolo[1,5-a]pyrimidin-6-yl)((S)-2-(4-fluorophenyl)pyrrolidin-1-yl)methanone (Compound A), a nonionizable and poorly water-soluble compound that selectively inhibits the ultrarapid potassium current (IKur) and is intended for the treatment of arrhythmia. Various nonaqueous solution formulations were evaluated, in vitro, for ability to prevent or delay precipitation of Compound A from solution following dilution with water. The plasma exposures of precipitation-resistant solutions, non precipitation-resistant solutions, and aqueous suspensions were then compared in rats, dogs, and/or humans. The data indicated that a solubilized, precipitation-resistant formulation achieved the highest plasma concentrations in all species and also improved dose proportionality, particularly in rats. Development of such formulations may be highly valuable for achieving in vivo blood levels often required for successful toxicological and early clinical evaluation of poorly soluble compounds.