As for this invention, biologically activity including the nano- particle which is designed in order to discharge the molecule, as for the said nano- particle, a) at least 40 weight % including with the Quito sun or that derivative and b) 60 weight % shikurodekisutorin or that derivative under, it becomes in regard to the system which becomes, at the same time both components a) and b) without being made to share connecting in interval those it is mixed. Biologically activity under the appropriate living thing environment which follows to that with efficient assembly of the molecule, it can do with those discharges this system.本発明は、生物学的に活性な分子を放出するために設計されたナノ粒子を含んでなる系に関し、該ナノ粒子は、a)少なくとも40重量%のキトサンまたはその誘導体と、b)60重量%未満のシクロデキストリンまたはその誘導体とを含んでなり、かつ両成分a)およびb)はそれらの間において共有結合せずに混合される。この系は、生物学的に活性な分子の効率的会合と、それに続く適切な生物環境下においてのそれらの放出とを行える。
