Paclitaxel(PTX)conjugated trimethyl chitosan nanoparticles(TP NPs)were developed through a cleavable linker for oral delivery of PTX.Chitosan with 30 and 200ku was used to synthesize trimethyl chitosan and then prepare TP(30)and TP(200).As the amphiphilic conjugates,TP(30)and TP(200)containing approximately 11% PTX could self-assemble into nanoparticles with average sizes of 166.2and 193.7 nm,respectively.TP NPs presented a sustained release of PTX for 10 days under physiological condition(pH7.4).TP(30)NPs ...