The aim of this research is to reduce the frequency of taking therapeutic drugs. Thus, anti-cancer drug [5-fluorourical (5-FU)] loaded chitosan/polyethylene glycol microparticles were prepared by a phase-inversion technique with tripolyphosphate (TPP) used as a cross-linking agent. The relationships between 5-FU release behavior/encapsulation efficiencies and chitosan concentrations, TPP concentrations, as well as cross-linking time were studied to identify better/superior conditions (3.5 wt% chitosan, 3 wt% TPP, and cross-linking time = 4 h) for preparing 5-FU-loaded microparticles. Furthermore, in order to ascertain the influence of their physical properties on 5-FU release performance, 5-FU-loaded microparticles were evaluated by swelling tests and scanning electron microscopy.
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Lin et al. (2009) studied this question.
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