聚乙二醇化殼聚糖納米粒的制備及局部滴眼給藥性能評價
[Abstract]:Objective to prepare a kind of chitosan nanoparticles modified by polyethylene glycol (PEG) and evaluate its local eyedrop performance. Methods the drug-loaded poly (ethylene glycol) chitosan nanoparticles were prepared by ion cross-linking method using Voliconazole as model drug. After characterization, the sustained-release ability of nanoparticles was investigated. Effects on pharmacokinetics of ocular surface and corneal permeability. Results the particle size of polyethylene glycol chitosan nanoparticles was (2335 鹵23) nm,Zeta, the potential was (23.1 鹵0.6) mV, the drug loading was 11.16%, and the entrapment efficiency was 61.35%. The drug release of nanoparticles in vitro was very slow and sustained for 48 hours. Compared with Voliconazole aqueous solution, the area under the concentration-time curve of nanoparticles was significantly increased, the half-life of the drug was prolonged, the clearance rate was decreased, and the average retention time of the drug on the surface of the eye was prolonged (P0.05). Fluorescence-labeled poly (ethylene glycol) chitosan nanoparticles can penetrate the corneal epithelium gradually into the corneal stroma. Conclusion compared with aqueous solution, polyethylene glycol chitosan nanoparticles can effectively reduce the loss of ocular surface drugs and improve the bioavailability of drugs.
【作者單位】: 重慶醫(yī)科大學附屬永川醫(yī)院眼科;重慶醫(yī)科大學附屬永川醫(yī)院:中心實驗室;
【分類號】:R943
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