The present invention provides a molecular assembly which is less likely to accumulate in tissue other than cancer tissue, is highly safe for a living body, and can be prepared by a simple and safe method and whose particle size can be easily controlled. The present invention provides a molecular imaging system and a molecular probe useful for the system, and a drug delivery system and a molecular probe useful for the system. The present invention provides a method for preparing molecular assembly, by which the particle size of molecular assembly having a signal group or a drug can be arbitrarily controlled in order to allow the molecular assembly to effectively accumulate in cancer tissue by utilizing EPR effect. A molecular assembly comprising: an amphiphilic block polymer A comprising a hydrophilic block chain and a hydrophobic block chain having 10 or more lactic acid units; a hydrophobic polymer A2 having at least 10 or more lactic acid units; and/or a labeled polymer B comprising at least 10 or more lactic acid units and a labeling group.
本发明提供了一种分子组装体,该组装体不太可能在癌组织以外的组织中积累,对
生物体高度安全,并且可以通过简单且安全的方法制备,并且其粒子大小可以轻松控制。本发明提供了一种分子成像系统和用于该系统的分子探针,以及用于该系统的药物传递系统和分子探针。本发明提供了一种制备分子组装体的方法,该方法可以任意控制具有信号基团或药物的分子组装体的粒子大小,以利用EPR效应使分子组装体有效地积累在癌组织中。所述分子组装体包括:一种两亲性嵌段聚合物A,其包括一个亲
水性嵌段链和一个具有10个或更多
乳酸单元的疏
水性嵌段链;一种疏
水性聚合物A2,其具有至少10个或更多
乳酸单元;和/或一种带标记的聚合物B,其包括至少10个或更多
乳酸单元和一个标记基团。