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- W2058477557 abstract "As stem-cell-based therapies rapidly advance toward clinical applications, there is a need for cheap, easily manufactured, injectable gels that can be tailored to carry stem cells and impart function to such cells. Herein we describe a process for making hydrogels composed of hydroxyphenyl propionic acid (HPA) conjugated, branched poly(ethylene glycol) (PEG) via an enzyme mediated, oxidative cross-linking method. Functionalization of the branched PEG with HPA at varying degrees of substitution was confirmed via attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and 1H NMR. The versatility of this hydrogel system was exemplified through variations in the degree of HPA substitution, polymer concentration, and the concentration of cross-linking reagents (horseradish peroxidase and H2O2), which resulted in a range of mechanical properties and gelation kinetics for these gels. Cross-linking of the PEG–HPA conjugate with a recombinantly produced Fibronectin fragment (Type III domains 7–10) encouraged attachment and spreading of human mesenchymal stem cells (hMSCs) when assessed in both two-dimensional and three-dimensional formats. Interestingly, when encapsulated in both nonfunctionalized and functionalized cross-linked PEG–HPA gels, MSCs showed good viability over all time periods assessed. With tunable gelation kinetics and mechanical properties, these hydrogels provide a flexible in vitro cell culture platform that will likely have significant utility in tissue engineering as an injectable delivery platform for cells to sites of tissue damage." @default.
- W2058477557 created "2016-06-24" @default.
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- W2058477557 date "2013-01-15" @default.
- W2058477557 modified "2023-09-30" @default.
- W2058477557 title "Tailorable Cell Culture Platforms from Enzymatically Cross-Linked Multifunctional Poly(ethylene glycol)-Based Hydrogels" @default.
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- W2058477557 doi "https://doi.org/10.1021/bm301652q" @default.
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