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• W4310477989 abstract "The aim of this study is to overcome the obstacle of the blood-brain barrier (BBB) in therapeutic drugs of Parkinson's disease (PD), like rhynchophylline (RIN) entry by intranasal administration and to solve the problem of short residence time of drugs in the nasal cavity by the dosage form design of thermosensitive gel. We first conducted a study of the screening of absorption enhancers and 3% hydroxypropyl-β-cyclodextrin (HP-β-CD) was effective to improve the nasal mucosal permeability of RIN. By adjusting the ratio of different components in order to make the gel with adhesion and rapid gelation which were determined to be Poloxamer 407 (P407) 20%, Poloxamer 188 (P188) 1%, polyethylene glycol 6000 (PEG-6000) 1% and HP-β-CD 3%. In addition, the characterization showed that the thermosensitive gel was network cross-linked, rapidly gelation upon entry into the nasal cavity and was stable as semi-solid state with adhesion as well as sustained release properties. Moreover, pharmacokinetic study was performed to evaluate the bioavailability and brain targeting of RIN thermosensitive gel and which were 1.6 times and 2.1 times higher than those of oral administration. We also evaluated the anti-PD effects of RIN thermosensitive gel in-vitro as well as in-vivo. The results showed that RIN thermosensitive gel was effective in repairing the motor function impairment, dysregulated expression levels of oxidative stress factors, and positive neuronal damage within the substantia nigra and dopamine caused by PD. The constructed intranasal drug administration strategy through thermosensitive gel provided a new choice for targeted treatment of PD together with other central nervous system diseases." @default.
• W4310477989 created "2022-12-10" @default.
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• W4310477989 date "2023-02-01" @default.
• W4310477989 modified "2023-10-18" @default.
• W4310477989 title "Intranasally administered thermosensitive gel for brain-targeted delivery of rhynchophylline to treat Parkinson’s disease" @default.
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• W4310477989 doi "https://doi.org/10.1016/j.colsurfb.2022.113065" @default.
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