In the present study,hydroxycamptothecin(HCPT)was taken as the model drug to prepare targeted-oriented hydroxycamptothecin nanoparticles drug system combined polybutylcyanoacrylate and hydroxypropyl-β-cyclodextrin (HCPT-PBCA-NP)by modern targeted drug delivery technique.The characteristics of distribution and pharmacokinetics in vivo were examined at the same time.The accomplishment of this project is a great achievement of nanoparticles drug system and develop a new idea,new method and new technique...