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• W4313281044 endingPage "203" @default.
• W4313281044 startingPage "193" @default.
• W4313281044 abstract "Recently, there has been increased interest in using mannan as an immunomodulatory bioconjugate. Despite notable immunological and functional differences between the reduced (R-Man) and oxidized (O-Man) forms of mannan, little is known about the impact of mannan oxidation state on its in vivo persistence or its potential controlled release from biomaterials that may improve immunotherapeutic or prophylactic efficacy. Here, we investigate the impact of oxidation state on the in vitro and in vivo release of mannan from a biocompatible and immunostimulatory multidomain peptide hydrogel, K2(SL)6K2 (abbreviated as K2), that has been previously used for the controlled release of protein and small molecule payloads. We observed that O-Man released more slowly from K2 hydrogels in vitro than R-Man. In vivo, the clearance of O-Man from K2 hydrogels was slower than O-Man alone. We attributed the slower release rate to the formation of dynamic imine bonds between reactive aldehyde groups on O-Man and the lysine residues on K2. This imine interaction was also observed to improve K2 + O-Man hydrogel strength and shear recovery without significantly influencing secondary structure or peptide nanofiber formation. There were no observed differences in the in vivo release rates of O-Man loaded in K2, R-Man loaded in K2, and R-Man alone. These data suggest that, after subcutaneous injection, R-Man naturally persists longer in vivo than O-Man and minimally interacts with the peptide hydrogel. These results highlight a potentially critical, but previously unreported, difference in the in vivo behavior of O-Man and R-Man and demonstrate that K2 can be used to normalize the release of O-Man to that of R-Man. Further, since K2 itself is an adjuvant, a combination of O-Man and K2 could be used to enhance the immunostimulatory effects of O-Man for applications such as infectious disease vaccines and cancer immunotherapy." @default.
• W4313281044 created "2023-01-06" @default.
• W4313281044 creator A5003379220 @default.
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• W4313281044 date "2022-12-29" @default.
• W4313281044 modified "2023-10-14" @default.
• W4313281044 title "Dynamic Imine Bonding Facilitates Mannan Release from a Nanofibrous Peptide Hydrogel" @default.
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• W4313281044 doi "https://doi.org/10.1021/acs.bioconjchem.2c00461" @default.
• W4313281044 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36580277" @default.
• W4313281044 hasPublicationYear "2022" @default.
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