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• W3114859211 abstract "Neurotrophin-3 growth factor can improve cochlear neuron survival, and localized delivery of this protein to the round window membrane in the middle ear may be able to reverse sensorineural hearing loss. Thus, the goal of this work was to develop an injectable hydrogel delivery system that can allow localized release of neurotrophin-3 in a controlled and sustained manner. We identified a PEG hydrogel formulation that uses thiol-vinyl sulfone Michael addition for crosslinking. This injectable formulation provides elastic hydrogels with higher mechanical rigidity, better bio-adhesion and longer residence time than Poloxamer hydrogels currently being investigated clinically for hearing loss. In vivo, PEG hydrogels induce local immune responses comparable to biocompatible Poloxamer hydrogels, yet they released payloads at a ~5-fold slower rate in the subcutaneous area. Based on this injectable hydrogel formulation, we designed an affinity-based protein release system by modifying PEG hydrogels with affinity peptides specific to neurotrophin-3 proteins. We verified the sustained release of neurotrophin-3 from peptide-conjugated PEG hydrogels resulting from the reversible interaction between peptides and proteins. The rate of affinity-controlled release depends on the polymer concentrations, the affinity of peptides and the peptide-to-protein ratios. Collectively, we developed an injectable hydrogel formulation for localized delivery of neurotrophin-3, which provides affinity-controlled release and longer delivery time compared to Poloxamer hydrogels." @default.
• W3114859211 created "2021-01-05" @default.
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• W3114859211 date "2021-02-01" @default.
• W3114859211 modified "2023-09-30" @default.
• W3114859211 title "An injectable PEG hydrogel controlling neurotrophin-3 release by affinity peptides" @default.
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• W3114859211 doi "https://doi.org/10.1016/j.jconrel.2020.12.045" @default.
• W3114859211 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33378693" @default.
• W3114859211 hasPublicationYear "2021" @default.
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