Journal: Fundamental Research
Article Title: Intranasal delivery of rotigotine to the brain for treating Parkinson’s disease
doi: 10.1016/j.fmre.2025.02.004
Figure Lengend Snippet: Synthesis and characterization of Rotigotine-loaded nanoparticles (RT-NPs). (a) Scheme for showing the preparative procedures for RT-NPs. The different mass ratio of rotigotine to PEG- b -PPG- b -PEG (average Mn 12,000) are set as seven groups, with the reaction volume hold constant in each group, the polymer maintaine a consistent concentration at 10 mg/mL in (b) and rotigotine concentration is fixed around 1 mg/mL in (c). (d) The mass ratio, reaction volume, and polymer concentration are consistent with (b) except for the use of polymer with a lower molecular weight (Mn 8400). (e) Entrapment efficiency of RT-NPs in (b)-(d).
Article Snippet: Dichloromethane was purchased from Chinasun Specialty Products Co., Ltd. Poly (ethylene glycol)-block-poly (propylene glycol)-block-poly(ethylene glycol) (PEG- b -PPG- b -PEG) with average molecular weights of 12,000 and 8000 were purchased from Shanghai Energy Chemical Co., Ltd. and Aladdin Co., Ltd. Dimethyl sulfoxide (DMSO) was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Acetonitrile and Trifluoroacetic acid were purchased from Shanghai J&K Scientific Ltd. Rotigotine was purchased from Shanghai yuanye Bio-Technology Co., Ltd. 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) hydrochloride was obtained from Dalian Meilun Biotech Co., Ltd. Phosphate buffer saline (0.01M, pH 7.2–7.4) was purchased from Solarbio Biotech.
Techniques: Polymer, Concentration Assay, Molecular Weight