Dacarbazine (DTIC) loaded or blank methoxy poly (ethylene glycol)-poly (lactide) (MPEG-PLA) nanoparticles (NPs) were prepared by modified w/o/w double emulsion-solvent evaporation method through ultrasonic processor without any additional additives. The hemolytic test and cytotoxicity test of blank MPEG-PLA NPs demonstrated that the obtained drug delivery system is safety. Its particle size distribution, morphology, drug loading, drug release proï¬le and anticancer activity in vitro were studied in detail. The small sized nanoparticles (NPs) with a particle size of 144.2±7.8 nm in diameter and drug encapsulation efficiency of 70.1±2.3% are easy to be dispersed in water and suitable for vascular administration. The drug release pattern was biphasic with a fast release rate followed by a slow one. The in vitro and in vivo study results demonstrated that compared with free DTIC, DTIC loaded MPEG-PLA NPs could induce more apoptosis of cancer cell and showed enhanced antitumor activity. The described DTIC loaded MPEG-PLA nanoparticle in this paper might be a novel potential formulation for metastatic melanoma therapy.
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Baoyue Ding (2011) studied this question.
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