Abstract
Liposome coated with hyaluronic acid (HA) was fabricated for targeted delivery of Doxorubicin hydrochloride (DOX) to CD44 expressing tumors. DOX was incorporated into liposome (DOX-L) via a transmembrane pH-gradient method, which contributed to high encapsulation efficiency (97%) and drug loading (19%). HA was modified on the surface of DOX-L by simple vortex (HA-DOX-L). The average diameter of optimized DOX-L and H-DOX-L was 109.7 ± 3.1 and 117.2 ± 5.0 nm, respectively, with good uniformity and stability during 6-month storage. SAXS and TEM evidenced the corona of HA on the surface of DOX-L, which convinced the prolonged circulation of DOX. The apoptosis study demonstrated the improved efficacy of HA-DOX-L with the human colon cancer cell line HCT-116 cells in comparison to the conventional reservoirs. This improved efficacy of HA-DOX-L with HCT-116 cells should be related with the interaction between HA and CD44 receptor of HCT-116 cells.
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