Abstract
A series of dendrimer G5-pluronic F127 nanofilms (at 1:10, 1:20 and 1:30 mole ratios), loaded with various percent of metronidazole hydrochloride, were prepared by the drug deposition with/without gelatin coating. The nanostructural feature of dendrimer G5-pluronic F127 as a matrix for a sustained drug release was investigated by choosing metronidazole, an antibacterial and antiprotozoal drug as a model drug. The studies on surface morphology, polymer erosion and metronidazole release of the prepared nanofilms revealed unique surface morphology, low film erosion rate and long drug release time. The drug release and the erosion rate of nanofilm were slowed in acidic pH condition and the presence of saliva in medium. The nanofilm of G5-PF127 (1:30 mole ratio) coated with gelatin further prolonged metronidazole release showing G5-PF127 coated with 20% gelatin to be the best suited for a metronidazole release. The nanofilms were stable for up to 9 months at dried condition, while those stored at room temperature with 30% relative humidity were less stable. Our results show that PAMAM dendrimer G5-pluronic F127 nanofilm has a potential to serve as a matrix for the local drug delivery.
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