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- W1999028098 abstract "Functionalized dextrans (FD) are anionic water-soluble polymers bearing carboxylate, benzylamide and sulfate groups, which exhibit binding capacity to transforming growth factor-β1 (TGF-β1). In this paper, we have investigated the ability of dextran-based hydrogels containing FD, to bind and release recombinant human TGF-β1. Hydrogels were prepared by chemical crosslink native dextran and FD with sodium trimetaphosphate in 1 m NaOH at 50°C. A wide range of hydrogels were prepared as particles ranging of 1–1.6 mm of diameter and characterized with various amounts of FD and with different crosslinker feeding ratios (CFR). Dried particles were soaked with recombinant human transforming growth factor-β1 (rhTGF-β1) to determine their capacity to deliver the growth factor. Results indicated that the in vitro kinetics releases of rhTGF-β1 were related to FD and CFR. Retention capacity of rhTGF-β1 increases with an increase of negative charges of the matrices brought by both phosphate linkages and FD as demonstrated by an additional release of growth factor in high ionic strength solution. Highly crosslinked hydrogels that contained the highest amount of FD (18% (w/w)) retained up to 88% of rhTGF-β1. Bioactivity of released growth factor was confirmed in a cell assay. These functionalized hydrogels may have important uses for the stabilization and the protection of rhTGF-β1 as entrapment systems and could be applied to other proteins of clinical interest." @default.
- W1999028098 created "2016-06-24" @default.
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- W1999028098 date "2005-05-01" @default.
- W1999028098 modified "2023-10-17" @default.
- W1999028098 title "Retention of transforming growth factor β1 using functionalized dextran-based hydrogels" @default.
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- W1999028098 doi "https://doi.org/10.1016/j.biomaterials.2004.06.003" @default.
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