The invention provides an amphiphilic graft
copolymer based on
hyaluronic acid, and a preparation method and application of the amphiphilic graft
copolymer. The
copolymer disclosed by the invention comprises
hyaluronic acid (HA) serving as a parent skeleton,
deoxycholic acid (DCA) grafted on the skeleton, a methoxy
polyethylene glycol (mPEG) unit and an N-acetyl-L-
cysteine (NAC) group. The invention also provides the preparation method of the copolymer. According to the method, the copolymer is prepared by modifying HA with mPEG, DCA and NAC. The invention also provides a hemostatic
sponge, adrug carrier and a pharmaceutical composition prepared from the copolymer. The copolymer is good in
biocompatibility, high in water absorption speed and capable of achieving active-and-passive
dual targeting and
redox conversion, and therefore, the copolymer can be used for preparing the hemostatic
sponge capable of realizing rapid water absorption and an anti-
cancer drug release carrier, realizesblood circulation prolonging,
high uptake and rapid
drug release of drugs, effectively increases
drug concentrations in
tumor cells and has good application prospects.