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- W2124548832 abstract "Excessive proteolytic degradation of fibronectin (FN) has been implicated in impaired tissue repair in chronic wounds. We previously reported two strategies for stabilizing FN against proteolytic degradation; the first conjugated polyethylene glycol (PEG) through cysteine residues and the second conjugated PEG chains of varying molecular weight on lysine residues. PEGylation of FN via lysine residues resulted in increased resistance to proteolysis with increasing PEG size, but an overall decrease in biological activity, as characterized by cell and gelatin binding. Our latest method to stabilize FN against proteolysis masks functional regions in the protein during lysine PEGylation. FN is PEGylated while it is bound to gelatin Sepharose beads with 2, 5, and 10 kDa PEG precursors. This results in partially PEGylated FN that is more stable than native FN and whose proteolytic stability increases with PEG molecular weight. Unlike completely PEGylated FN, partially PEGylated FN has cell adhesion, gelatin binding, and matrix assembly responses that are comparable to native FN. This is new evidence of how PEGylation variables can be used to stabilize FN while retaining its activity. The conjugates developed herein can be used to dissect molecular mechanisms mediated by FN stability and functionality, and address the problem of FN degradation in chronic wounds. © 2014 American Institute of Chemical Engineers Biotechnol. Prog., 31:277–288, 2015" @default.
- W2124548832 created "2016-06-24" @default.
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- W2124548832 date "2014-11-24" @default.
- W2124548832 modified "2023-09-30" @default.
- W2124548832 title "Proteolytically stabilizing fibronectin without compromising cell and gelatin binding activity" @default.
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- W2124548832 doi "https://doi.org/10.1002/btpr.2018" @default.
- W2124548832 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25394993" @default.
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