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- W2153002415 abstract "In order to improve the absorption of nanoparticles in the brain following nasal administration, a novel protocol to conjugate biorecognitive ligands—lectins to the surface of poly (ethylene glycol)–poly (lactic acid) (PEG–PLA) nanoparticles was established in the study. Wheat germ agglutinin (WGA), specifically binding to N-acetyl-d-glucosamine and sialic acid, both of which were abundantly observed in the nasal cavity, was selected as a model lectin. The WGA-conjugated nanoparticles were prepared by incorporating maleimide in the PLA–PEG molecular and taking advantage of its thiol group binding reactivity to conjugate with 2-iminothialane thiolated WGA. Coupling of WGA with the PEG–PLA nanoparticles was confirmed by the existence of gold-labeled WGA-NP under TEM. The retention of biorecognitive activity of WGA after the covalent coupling procedure was confirmed by haemagglutination test. The resulting nanoparticles presented negligible nasal ciliatoxicity and the brain uptake of a fluorescent marker—coumarin carried by WGA functionized nanoparticles was about 2 folds in different brain tissues compared with that of coumarin incorporated in the unmodified ones. Thus, the technique offered a novel effective noninvasive system for brain drug delivery, especially for brain protein and gene delivery." @default.
- W2153002415 created "2016-06-24" @default.
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- W2153002415 date "2006-06-01" @default.
- W2153002415 modified "2023-10-11" @default.
- W2153002415 title "Lectin-conjugated PEG–PLA nanoparticles: Preparation and brain delivery after intranasal administration" @default.
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- W2153002415 doi "https://doi.org/10.1016/j.biomaterials.2006.01.038" @default.
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