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An Ultra-thin Amniotic Membrane as Carrier in Corneal Epithelium Tissue-Engineering
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An Ultra-thin Amniotic Membrane as Carrier in Corneal Epithelium Tissue-Engineering
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An Ultra-thin Amniotic Membrane as Carrier in Corneal Epithelium Tissue-Engineering
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Journal Article
An Ultra-thin Amniotic Membrane as Carrier in Corneal Epithelium Tissue-Engineering
2016
Overview
Amniotic membranes (AMs) are widely used as a corneal epithelial tissue carrier in reconstruction surgery. However, the engineered tissue transparency is low due to the translucent thick underlying AM stroma. To overcome this drawback, we developed an ultra-thin AM (UAM) by using collagenase IV to strip away from the epithelial denuded AM (DAM) some of the stroma. By thinning the stroma to about 30 μm, its moist and dry forms were rendered acellular, optically clear and its collagen framework became compacted and inerratic. Engineered rabbit corneal epithelial cell (RCEC) sheets generated through expansion of limbal epithelial cells on UAM were more transparent and thicker than those expanded on DAM. Moreover, ΔNp63 and ABCG2 gene expression was greater in tissue engineered cell sheets expanded on UAM than on DAM. Furthermore, 2 weeks after surgery, the cornea grafted with UAM based cell sheets showed higher transparency and more stratified epithelium than the cornea grafted with DAM based cell sheets. Taken together, tissue engineered corneal epithelium generated on UAM has a preferable outcome because the transplanted tissue is more transparent and better resembles the phenotype of the native tissue than that obtained by using DAM for this procedure. UAM preserves compact layer of the amniotic membrane and maybe an ideal substrate for corneal epithelial tissue engineering.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 13/100
/ 13/106
/ 13/51
/ 14/19
/ 14/34
/ 14/5
/ 82/80
/ Animals
/ Cell Differentiation - genetics
/ Collagen
/ Cornea
/ Corneal Diseases - pathology
/ Epithelium, Corneal - pathology
/ Epithelium, Corneal - transplantation
/ Humanities and Social Sciences
/ Mice
/ Rabbits
/ Science
/ Stroma
/ Surgery
/ Thinning
