Vascularization of the Dermal Support Enhances Wound Re-Epithelialization by In Situ Delivery of Epidermal Keratinocytes

被引:0
作者
Lugo, Liana M. [2 ]
Lei, Pedro [1 ]
Andreadis, Stelios T. [1 ,3 ]
机构
[1] SUNY Buffalo, Dept Chem & Biol Engn, Bioengn Lab, Amherst, NY 14260 USA
[2] SUNY Buffalo, Sch Med & Biomed Sci, Dept Surg, Amherst, NY 14260 USA
[3] Ctr Excellence Bioinformat & Life Sci, Buffalo, NY USA
关键词
CULTURED EPITHELIAL AUTOGRAFT; ENGINEERED SKIN SUBSTITUTES; ENDOTHELIAL GROWTH-FACTOR; BASEMENT-MEMBRANE; ARTIFICIAL SKIN; GENE DELIVERY; AUTOLOGOUS KERATINOCYTES; FIBROBLAST-CULTURES; TISSUE REGENERATION; DESIGN PRINCIPLES;
D O I
10.1089/ten.tea.2010.0125
中图分类号
Q813 [细胞工程];
学科分类号
摘要
Despite significant advances in management of severe wounds such as burns and chronic ulcers, autologous split-thickness skin grafts are still the gold standard of care. The main problems with this approach include pain and discomfort associated with harvesting autologous tissue, limited availability of donor sites, and the need for multiple surgeries. Although tissue engineering has great potential to provide alternative approaches for tissue regeneration, several problems have hampered progress in translating technological advances to clinical reality. Specifically, engineering of skin substitutes requires long culture times and delayed vascularization after implantation compromises graft survival. To address these issues we developed a novel two-prong strategy for tissue regeneration in vivo: (1) vascularization of acellular dermal scaffolds by infiltration of angiogenic factors; and (2) generation of stratified epidermis by in situ delivery of epidermal keratinocytes onto the prevascularized dermal support. Using athymic mouse as a model system, we found that incorporation of angiogenic factors within acellular human dermis enhanced the density and diameter of infiltrating host blood vessels. Increased vascularization correlated with enhanced proliferation and stratification of the neoepidermis originating from the fibrin-keratinocyte cell suspension. This strategy promoted tissue regeneration in vivo with no need for engineering skin substitutes; therefore, it may be useful for treatment of major wounds when skin donor sites are scarce and rapid wound coverage is required.
引用
收藏
页码:665 / 675
页数:11
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