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Li, Shuang; Liu, Jiaxin; Li, Ge; Zhang, Xueyan; Xu, Fei; Fu, Zhijiang; Teng, Lesheng; Li, Youxin; Sun, Fengying
European journal of pharmaceutics and biopharmaceutics, August 2019, 2019-Aug, 2019-08-00, 20190801, Volume: 141Journal Article
Display omitted Parkinson’s disease (PD) is associated with symptoms such as tremor and bradykinesia which, together with a rigorous dosing regimen, can place an untenable burden on patients. These issues underscore the need for triggerable, modulated drug delivery systems. Currently, pramipexole (PRX) is the most widely used non-ergot dopamine agonist for the treatment of PD. In this study, near-infrared light-responsive PRX and hollow gold nanospheres (HGNS)-loaded biodegradable poly (D, L-lactide-co-glycolide) (PLGA) microspheres (PRX/HGNS MS) were fabricated using solid-in-oil-in-water (S/O/W) and water-in-oil-in-water (W/O/W) emulsion-solvent evaporation techniques to achieve modulated drug release. The PRX/HGNS MS were uniform, with an average diameter of approximately 24 µm, favorable PRX and HGNS encapsulation efficiencies (51.71 ± 0.54% and 65.15 ± 2.30%, respectively) and rapid, controllable drug release both in vitro and in vivo. Cytotoxicity tests revealed no significant differences between HGNS and PRX/HGNS MS when compared with a negative control. Pharmacodynamics and immunohistochemistry studies revealed a more rapid recovery of striatum in the group treated with PRX/HGNS MS produced using the S/O/W method. The results clearly demonstrate that light-responsive PRX/HGNS MS produced using the S/O/W method have the potential to address PD patients’ mobility problems in a smart, controllable and remotely triggerable manner.
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