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- W2017608924 abstract "Crosslinked, chemically modified hyaluronan (HA) hydrogels pre-loaded with two cytokine growth factors, vascular endothelial growth factor (VEGF) and angiopoietin-1 (Ang-1), were employed to elicit new microvessel growth in vivo, in both the presence and absence of heparin (Hp) in the gels. HA hydrogel film samples were surgically implanted in the ear pinnae of mice, and the ears were harvested at 7 or 14 days post-implantation. Analysis of neovascularization showed that each of the treatment groups receiving an implant, except for HA/Hp at day 14, demonstrated significantly more microvessel density than control ears undergoing surgery but receiving no implant (p<0.015). Treatment groups receiving either Ang-1 alone, or aqueous co-delivery of both Ang-1 and VEGF, were statistically unchanged with time. In contrast, film delivery of both growth factors produced continuing increases in vascularization from day 7 to day 14 in the absence of Hp, but decreases in its presence. However, presentation of both VEGF and Ang-1 in crosslinked HA gels containing Hp generated intact microvessel beds with well-defined borders. The HA hydrogels containing Ang-1+VEGF produced the greatest angiogenic response of any treatment group tested at day 14 (NI=7.44 in the absence of Hp and 4.67 in its presence, where NI is a neovascularization index). Even in the presence of Hp, this had 29% greater vessel density than the next largest treatment group receiving HA/Hp+VEGF (NI=3.61, p=0.04). New therapeutic approaches for numerous pathologies could be notably enhanced by the localized, sustained angiogenic response produced by release of both VEGF and Ang-1 from crosslinked HA films." @default.
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- W2017608924 date "2006-12-01" @default.
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- W2017608924 title "Stimulation of in vivo angiogenesis using dual growth factor-loaded crosslinked glycosaminoglycan hydrogels" @default.
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- W2017608924 doi "https://doi.org/10.1016/j.biomaterials.2006.08.029" @default.
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