Advance in microsphere agents of drug carriers

With the development of preparation technique,microsphere agents not only have the dispersion and protection functions of traditional drug carrier,but also have the effects of slow release,it has a promising future in their application as a recently new type drug carrier.But as an ideal drug carrier,it also has following characteristics:① Targeting;② Controllable capability of drug release;③ Its pharmacology should be stable and easy for drug release;④ Avirulence;⑤ Degradable.There is a gap between applied microsphere agents and its goal,so it has practically clinical implications to speed up research and development of microsphere agents and make drug-loaded system ameliorated.