�����������ؾۺ��ｺ�����Ʊ��������ܵ��о�

Preparation and Characterization of Heparan Sulfate-Based Copolymer Micelles

??OBJECTIVE To prepare heparan sulfate-vitamin E succinate (HDV) amphipathic copolymers and explore the pharmaceutical properties of doxorubicin (DOX)-loaded HDV copolymer micelles (DOX/HDV). METHODS HDV copolymers were prepared by amide reaction and its structure was confirmed by ¹H-NMR. DOX/HDV micelles were prepared by ultrasonic method. The particle size, morphology, Zeta potential, drug loading, entrapment efficiency, and in vitro drug release and cytotoxicity were evaluated. RESULTS HDV amphipathic copolymers were synthesized successfully. The particle size, PDI value and Zeta potential of drug-loaded micelles were (105.0??7.3) nm, (0.239??0.484) and (-21.4??2.6) mV, respectively. The encapsulation and drug loading rate were (76.22??0.76)% and (9.53?? 0.58)%, respectively. The results of drug release test in vitro showed that DOX was released slowly from the micelles. Cytotoxicity experiments indicated that blank micelles had no apparent toxicity against both tumor cells and normal cells. However, DOX/HDV micelles could inhibit the tumor cells growth obviously. CONCLUSION HDV copolymers can effectively load DOX with properties of drug sustained release and enhanced cytotoxicity against tumor cells in vitro, which indicates that HDV may be a potential candidate for cancer therapy.