材料科学
视网膜
生物相容性
视网膜
视网膜色素上皮
聚对苯二甲酸乙二醇酯
生物医学工程
静电纺丝
纤维
视网膜变性
移植
生物物理学
眼科
医学
复合材料
聚合物
光学
外科
生物
物理
冶金
作者
Zengping Liu,Na Yu,Frank G. Holz,Fang Yang,Boris V. Stanzel
出处
期刊:Biomaterials
[Elsevier]
日期:2014-03-01
卷期号:35 (9): 2837-2850
被引量:90
标识
DOI:10.1016/j.biomaterials.2013.12.069
摘要
Tissue engineered retinal pigment epithelial (RPE) transplantation is a promising cell-based therapy for age-related macular degeneration. The aim of this work is to develop a supportive scaffold with a favorable topography to aid functional RPE monolayer maintenance while being tolerated underneath the retina. To this end, films and electrospun substrates with fiber diameters ranging from 200 to 1000 nm were made of polyethylene terephthalate or poly(L-lactide-co-ε-caprolactone), and then tested using human fetal RPE cells in vitro and transplanted subretinally in rabbits. The results indicated that RPE on both 200 nm fiber variants showed the highest cell densities, adherent monolayers achieved deeper pigmentation, and more uniform hexagonal tight junctions. Facile subretinal implantation of flat 200 nm fiber membranes was achieved by electrospinning them onto a porous rigid-elastic carrier. Spectral-domain optical coherence tomography showed a reattached, slightly thinned retina overlying the implants over 2 weeks observation. Histology demonstrated native RPE variably migrated onto the nanofibers, and a reactive gliosis with some photoreceptor degeneration. In conclusion, scaffolds with 200 nm fiber topography enhanced RPE culture, showed subretinal biocompatibility, and should thus be considered for future cell-based therapies in blinding retinal diseases.
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