申请人:University Technology Corporation
公开号:US20020032166A1
公开(公告)日:2002-03-14
Provided is a method for preparing a true, homogeneous solution of a pharmaceutical substance dissolved in an organic solvent in which the pharmaceutical substance is not normally soluble. Solubilization is obtained by forming a hydrophobic ion pair complex involving the pharmaceutical substance and an amphiphilic material. The resulting organic solution may be further processed to prepare pharmaceutical powders. A biodegradable polymer may be co-dissolved with the pharmaceutical substance and the amphiphilic material and may be incorporated into a pharmaceutical powder. A preferred method for preparing pharmaceutical powders is to subject the organic solution to gas antisolvent precipitation using a supercritical gas antisolvent such as carbon dioxide. Also provided is a method for making hollow particles having a fiber-like shape which would provide enhanced retention time in the stomach if ingested by a human or animal host. Further provided are novel biocompatible cationic surfactants and uses therefor, including the delivery, in vitro and in vivo, of nucleic acids into cells to transform the cells.
提供了一种制备药物物质在有机溶剂中真正均质溶解的方法,其中药物物质通常不溶于有机溶剂。通过形成涉及药物物质和两性分子材料的疏水离子对复合物来获得溶解度。所得到的有机溶液可以进一步处理以制备药物粉末。生物可降解聚合物可以与药物物质和两性分子材料共溶,并可以并入药物粉末中。制备药物粉末的首选方法是将有机溶液经过超临界气体反溶剂沉淀使用超临界气体反溶剂如二氧化碳。此外,提供了一种制备纤维状空心粒子的方法,如果被人类或动物宿主吞咽,将提供增强的胃滞留时间。还提供了新型生物相容阳离子表面活性剂及其用途,包括将核酸在体外和体内传递到细胞中以转化细胞。